Auto merge of #73081 - Dylan-DPC:rollup-1aqk215, r=Dylan-DPC

Rollup of 5 pull requests

Successful merges:

 - #72810 (validate basic sanity for TerminatorKind)
 - #72989 (Revert pr 71840)
 - #72993 (Count the beta prerelease number just from master)
 - #73057 (Clean up E0644 explanation)
 - #73059 (remove outdated comment)

Failed merges:

r? @ghost

63 files changed, 1900 insertions, 1677 deletions

diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index c46c68e4d56..8d8a036caef 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -963,29 +963,15 @@ impl Build {
             return s;
         }
 
-        let beta = output(
-            Command::new("git").arg("ls-remote").arg("origin").arg("beta").current_dir(&self.src),
-        );
-        let beta = beta.trim().split_whitespace().next().unwrap();
-        let master = output(
-            Command::new("git").arg("ls-remote").arg("origin").arg("master").current_dir(&self.src),
-        );
-        let master = master.trim().split_whitespace().next().unwrap();
-
-        // Figure out where the current beta branch started.
-        let base = output(
-            Command::new("git").arg("merge-base").arg(beta).arg(master).current_dir(&self.src),
-        );
-        let base = base.trim();
-
-        // Next figure out how many merge commits happened since we branched off
-        // beta. That's our beta number!
+        // Figure out how many merge commits happened since we branched off master.
+        // That's our beta number!
+        // (Note that we use a `..` range, not the `...` symmetric difference.)
         let count = output(
             Command::new("git")
                 .arg("rev-list")
                 .arg("--count")
                 .arg("--merges")
-                .arg(format!("{}...HEAD", base))
+                .arg("refs/remotes/origin/master..HEAD")
                 .current_dir(&self.src),
         );
         let n = count.trim().parse().unwrap();
diff --git a/src/librustc_error_codes/error_codes/E0644.md b/src/librustc_error_codes/error_codes/E0644.md
index 277643dfb1a..8c68da3b2f3 100644
--- a/src/librustc_error_codes/error_codes/E0644.md
+++ b/src/librustc_error_codes/error_codes/E0644.md
@@ -1,6 +1,6 @@
 A closure or generator was constructed that references its own type.
 
-Erroneous example:
+Erroneous code example:
 
 ```compile_fail,E0644
 fn fix<F>(f: &F)
diff --git a/src/librustc_middle/ty/sty.rs b/src/librustc_middle/ty/sty.rs
index f01b9751c40..5d4c2a54267 100644
--- a/src/librustc_middle/ty/sty.rs
+++ b/src/librustc_middle/ty/sty.rs
@@ -724,10 +724,6 @@ impl<'tcx> Binder<&'tcx List<ExistentialPredicate<'tcx>>> {
 ///
 /// Trait references also appear in object types like `Foo<U>`, but in
 /// that case the `Self` parameter is absent from the substitutions.
-///
-/// Note that a `TraitRef` introduces a level of region binding, to
-/// account for higher-ranked trait bounds like `T: for<'a> Foo<&'a U>`
-/// or higher-ranked object types.
 #[derive(Copy, Clone, PartialEq, Eq, Hash, RustcEncodable, RustcDecodable)]
 #[derive(HashStable, TypeFoldable)]
 pub struct TraitRef<'tcx> {
diff --git a/src/librustc_mir/dataflow/move_paths/builder.rs b/src/librustc_mir/dataflow/move_paths/builder.rs
index da02211d002..4749d746845 100644
--- a/src/librustc_mir/dataflow/move_paths/builder.rs
+++ b/src/librustc_mir/dataflow/move_paths/builder.rs
@@ -362,18 +362,17 @@ impl<'b, 'a, 'tcx> Gatherer<'b, 'a, 'tcx> {
     fn gather_terminator(&mut self, term: &Terminator<'tcx>) {
         match term.kind {
             TerminatorKind::Goto { target: _ }
-            | TerminatorKind::FalseEdges { .. }
-            | TerminatorKind::FalseUnwind { .. }
-            // In some sense returning moves the return place into the current
-            // call's destination, however, since there are no statements after
-            // this that could possibly access the return place, this doesn't
-            // need recording.
-            | TerminatorKind::Return
             | TerminatorKind::Resume
             | TerminatorKind::Abort
             | TerminatorKind::GeneratorDrop
+            | TerminatorKind::FalseEdges { .. }
+            | TerminatorKind::FalseUnwind { .. }
             | TerminatorKind::Unreachable => {}
 
+            TerminatorKind::Return => {
+                self.gather_move(Place::return_place());
+            }
+
             TerminatorKind::Assert { ref cond, .. } => {
                 self.gather_operand(cond);
             }
@@ -417,7 +416,7 @@ impl<'b, 'a, 'tcx> Gatherer<'b, 'a, 'tcx> {
                 ref operands,
                 options: _,
                 line_spans: _,
-                destination: _
+                destination: _,
             } => {
                 for op in operands {
                     match *op {
diff --git a/src/librustc_mir/interpret/terminator.rs b/src/librustc_mir/interpret/terminator.rs
index b048240ca8d..3db16a71bab 100644
--- a/src/librustc_mir/interpret/terminator.rs
+++ b/src/librustc_mir/interpret/terminator.rs
@@ -50,7 +50,13 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                 self.go_to_block(target_block);
             }
 
-            Call { ref func, ref args, destination, ref cleanup, .. } => {
+            Call {
+                ref func,
+                ref args,
+                destination,
+                ref cleanup,
+                from_hir_call: _from_hir_call,
+            } => {
                 let old_stack = self.frame_idx();
                 let old_loc = self.frame().loc;
                 let func = self.eval_operand(func, None)?;
diff --git a/src/librustc_mir/transform/validate.rs b/src/librustc_mir/transform/validate.rs
index a25edd131ba..7d301b2f496 100644
--- a/src/librustc_mir/transform/validate.rs
+++ b/src/librustc_mir/transform/validate.rs
@@ -3,10 +3,13 @@
 use super::{MirPass, MirSource};
 use rustc_middle::mir::visit::Visitor;
 use rustc_middle::{
-    mir::{Body, Location, Operand, Rvalue, Statement, StatementKind},
-    ty::{ParamEnv, TyCtxt},
+    mir::{
+        BasicBlock, Body, Location, Operand, Rvalue, Statement, StatementKind, Terminator,
+        TerminatorKind,
+    },
+    ty::{self, ParamEnv, TyCtxt},
 };
-use rustc_span::{def_id::DefId, Span, DUMMY_SP};
+use rustc_span::def_id::DefId;
 
 pub struct Validator {
     /// Describes at which point in the pipeline this validation is happening.
@@ -30,14 +33,27 @@ struct TypeChecker<'a, 'tcx> {
 }
 
 impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
-    fn fail(&self, span: Span, msg: impl AsRef<str>) {
+    fn fail(&self, location: Location, msg: impl AsRef<str>) {
+        let span = self.body.source_info(location).span;
         // We use `delay_span_bug` as we might see broken MIR when other errors have already
         // occurred.
         self.tcx.sess.diagnostic().delay_span_bug(
             span,
-            &format!("broken MIR in {:?} ({}): {}", self.def_id, self.when, msg.as_ref()),
+            &format!(
+                "broken MIR in {:?} ({}) at {:?}:\n{}",
+                self.def_id,
+                self.when,
+                location,
+                msg.as_ref()
+            ),
         );
     }
+
+    fn check_bb(&self, location: Location, bb: BasicBlock) {
+        if self.body.basic_blocks().get(bb).is_none() {
+            self.fail(location, format!("encountered jump to invalid basic block {:?}", bb))
+        }
+    }
 }
 
 impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
@@ -45,12 +61,10 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
         // `Operand::Copy` is only supposed to be used with `Copy` types.
         if let Operand::Copy(place) = operand {
             let ty = place.ty(&self.body.local_decls, self.tcx).ty;
+            let span = self.body.source_info(location).span;
 
-            if !ty.is_copy_modulo_regions(self.tcx, self.param_env, DUMMY_SP) {
-                self.fail(
-                    DUMMY_SP,
-                    format!("`Operand::Copy` with non-`Copy` type {} at {:?}", ty, location),
-                );
+            if !ty.is_copy_modulo_regions(self.tcx, self.param_env, span) {
+                self.fail(location, format!("`Operand::Copy` with non-`Copy` type {}", ty));
             }
         }
 
@@ -65,11 +79,8 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
                 Rvalue::Use(Operand::Copy(src) | Operand::Move(src)) => {
                     if dest == src {
                         self.fail(
-                            DUMMY_SP,
-                            format!(
-                                "encountered `Assign` statement with overlapping memory at {:?}",
-                                location
-                            ),
+                            location,
+                            "encountered `Assign` statement with overlapping memory",
                         );
                     }
                 }
@@ -77,4 +88,98 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
             }
         }
     }
+
+    fn visit_terminator(&mut self, terminator: &Terminator<'tcx>, location: Location) {
+        match &terminator.kind {
+            TerminatorKind::Goto { target } => {
+                self.check_bb(location, *target);
+            }
+            TerminatorKind::SwitchInt { targets, values, .. } => {
+                if targets.len() != values.len() + 1 {
+                    self.fail(
+                        location,
+                        format!(
+                            "encountered `SwitchInt` terminator with {} values, but {} targets (should be values+1)",
+                            values.len(),
+                            targets.len(),
+                        ),
+                    );
+                }
+                for target in targets {
+                    self.check_bb(location, *target);
+                }
+            }
+            TerminatorKind::Drop { target, unwind, .. } => {
+                self.check_bb(location, *target);
+                if let Some(unwind) = unwind {
+                    self.check_bb(location, *unwind);
+                }
+            }
+            TerminatorKind::DropAndReplace { target, unwind, .. } => {
+                self.check_bb(location, *target);
+                if let Some(unwind) = unwind {
+                    self.check_bb(location, *unwind);
+                }
+            }
+            TerminatorKind::Call { func, destination, cleanup, .. } => {
+                let func_ty = func.ty(&self.body.local_decls, self.tcx);
+                match func_ty.kind {
+                    ty::FnPtr(..) | ty::FnDef(..) => {}
+                    _ => self.fail(
+                        location,
+                        format!("encountered non-callable type {} in `Call` terminator", func_ty),
+                    ),
+                }
+                if let Some((_, target)) = destination {
+                    self.check_bb(location, *target);
+                }
+                if let Some(cleanup) = cleanup {
+                    self.check_bb(location, *cleanup);
+                }
+            }
+            TerminatorKind::Assert { cond, target, cleanup, .. } => {
+                let cond_ty = cond.ty(&self.body.local_decls, self.tcx);
+                if cond_ty != self.tcx.types.bool {
+                    self.fail(
+                        location,
+                        format!(
+                            "encountered non-boolean condition of type {} in `Assert` terminator",
+                            cond_ty
+                        ),
+                    );
+                }
+                self.check_bb(location, *target);
+                if let Some(cleanup) = cleanup {
+                    self.check_bb(location, *cleanup);
+                }
+            }
+            TerminatorKind::Yield { resume, drop, .. } => {
+                self.check_bb(location, *resume);
+                if let Some(drop) = drop {
+                    self.check_bb(location, *drop);
+                }
+            }
+            TerminatorKind::FalseEdges { real_target, imaginary_target } => {
+                self.check_bb(location, *real_target);
+                self.check_bb(location, *imaginary_target);
+            }
+            TerminatorKind::FalseUnwind { real_target, unwind } => {
+                self.check_bb(location, *real_target);
+                if let Some(unwind) = unwind {
+                    self.check_bb(location, *unwind);
+                }
+            }
+            TerminatorKind::InlineAsm { destination, .. } => {
+                if let Some(destination) = destination {
+                    self.check_bb(location, *destination);
+                }
+            }
+            // Nothing to validate for these.
+            TerminatorKind::Resume
+            | TerminatorKind::Abort
+            | TerminatorKind::Return
+            | TerminatorKind::Unreachable
+            | TerminatorKind::GeneratorDrop => {}
+        }
+    }
 }
diff --git a/src/librustc_mir/util/elaborate_drops.rs b/src/librustc_mir/util/elaborate_drops.rs
index ed999c6871b..8f27247bfb4 100644
--- a/src/librustc_mir/util/elaborate_drops.rs
+++ b/src/librustc_mir/util/elaborate_drops.rs
@@ -233,6 +233,8 @@ where
                     .patch_terminator(bb, TerminatorKind::Goto { target: self.succ });
             }
             DropStyle::Static => {
+                let loc = self.terminator_loc(bb);
+                self.elaborator.clear_drop_flag(loc, self.path, DropFlagMode::Deep);
                 self.elaborator.patch().patch_terminator(
                     bb,
                     TerminatorKind::Drop {
@@ -243,7 +245,9 @@ where
                 );
             }
             DropStyle::Conditional => {
-                let drop_bb = self.complete_drop(self.succ, self.unwind);
+                let unwind = self.unwind; // FIXME(#43234)
+                let succ = self.succ;
+                let drop_bb = self.complete_drop(Some(DropFlagMode::Deep), succ, unwind);
                 self.elaborator
                     .patch()
                     .patch_terminator(bb, TerminatorKind::Goto { target: drop_bb });
@@ -315,7 +319,7 @@ where
                 // our own drop flag.
                 path: self.path,
             }
-            .complete_drop(succ, unwind)
+            .complete_drop(None, succ, unwind)
         }
     }
 
@@ -344,7 +348,13 @@ where
         // Clear the "master" drop flag at the end. This is needed
         // because the "master" drop protects the ADT's discriminant,
         // which is invalidated after the ADT is dropped.
-        (self.drop_flag_reset_block(DropFlagMode::Shallow, self.succ, self.unwind), self.unwind)
+        let (succ, unwind) = (self.succ, self.unwind); // FIXME(#43234)
+        (
+            self.drop_flag_reset_block(DropFlagMode::Shallow, succ, unwind),
+            unwind.map(|unwind| {
+                self.drop_flag_reset_block(DropFlagMode::Shallow, unwind, Unwind::InCleanup)
+            }),
+        )
     }
 
     /// Creates a full drop ladder, consisting of 2 connected half-drop-ladders
@@ -878,7 +888,11 @@ where
                     self.open_drop_for_adt(def, substs)
                 }
             }
-            ty::Dynamic(..) => self.complete_drop(self.succ, self.unwind),
+            ty::Dynamic(..) => {
+                let unwind = self.unwind; // FIXME(#43234)
+                let succ = self.succ;
+                self.complete_drop(Some(DropFlagMode::Deep), succ, unwind)
+            }
             ty::Array(ety, size) => {
                 let size = size.try_eval_usize(self.tcx(), self.elaborator.param_env());
                 self.open_drop_for_array(ety, size)
@@ -889,10 +903,20 @@ where
         }
     }
 
-    fn complete_drop(&mut self, succ: BasicBlock, unwind: Unwind) -> BasicBlock {
-        debug!("complete_drop(succ={:?}, unwind={:?})", succ, unwind);
+    fn complete_drop(
+        &mut self,
+        drop_mode: Option<DropFlagMode>,
+        succ: BasicBlock,
+        unwind: Unwind,
+    ) -> BasicBlock {
+        debug!("complete_drop({:?},{:?})", self, drop_mode);
 
         let drop_block = self.drop_block(succ, unwind);
+        let drop_block = if let Some(mode) = drop_mode {
+            self.drop_flag_reset_block(mode, drop_block, unwind)
+        } else {
+            drop_block
+        };
 
         self.drop_flag_test_block(drop_block, succ, unwind)
     }
@@ -907,11 +931,6 @@ where
     ) -> BasicBlock {
         debug!("drop_flag_reset_block({:?},{:?})", self, mode);
 
-        if unwind.is_cleanup() {
-            // The drop flag isn't read again on the unwind path, so don't
-            // bother setting it.
-            return succ;
-        }
         let block = self.new_block(unwind, TerminatorKind::Goto { target: succ });
         let block_start = Location { block, statement_index: 0 };
         self.elaborator.clear_drop_flag(block_start, self.path, mode);
@@ -1028,6 +1047,11 @@ where
         self.elaborator.patch().new_temp(ty, self.source_info.span)
     }
 
+    fn terminator_loc(&mut self, bb: BasicBlock) -> Location {
+        let body = self.elaborator.body();
+        self.elaborator.patch().terminator_loc(body, bb)
+    }
+
     fn constant_usize(&self, val: u16) -> Operand<'tcx> {
         Operand::Constant(box Constant {
             span: self.source_info.span,
diff --git a/src/librustc_mir/util/graphviz.rs b/src/librustc_mir/util/graphviz.rs
index a0a82ce3b9d..50193c4a0db 100644
--- a/src/librustc_mir/util/graphviz.rs
+++ b/src/librustc_mir/util/graphviz.rs
@@ -98,17 +98,12 @@ where
     write!(w, r#"<table border="0" cellborder="1" cellspacing="0">"#)?;
 
     // Basic block number at the top.
-    let (blk, color) = if data.is_cleanup {
-        (format!("{} (cleanup)", block.index()), "lightblue")
-    } else {
-        (format!("{}", block.index()), "gray")
-    };
     write!(
         w,
-        r#"<tr><td bgcolor="{color}" align="center" colspan="{colspan}">{blk}</td></tr>"#,
+        r#"<tr><td {attrs} colspan="{colspan}">{blk}</td></tr>"#,
+        attrs = r#"bgcolor="gray" align="center""#,
         colspan = num_cols,
-        blk = blk,
-        color = color
+        blk = block.index()
     )?;
 
     init(w)?;
diff --git a/src/librustc_mir_build/build/block.rs b/src/librustc_mir_build/build/block.rs
index 4e4f0dc74cb..2be4136ad42 100644
--- a/src/librustc_mir_build/build/block.rs
+++ b/src/librustc_mir_build/build/block.rs
@@ -28,16 +28,14 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         self.in_opt_scope(opt_destruction_scope.map(|de| (de, source_info)), move |this| {
             this.in_scope((region_scope, source_info), LintLevel::Inherited, move |this| {
                 if targeted_by_break {
-                    this.in_breakable_scope(None, destination, span, |this| {
-                        Some(this.ast_block_stmts(
-                            destination,
-                            block,
-                            span,
-                            stmts,
-                            expr,
-                            safety_mode,
-                        ))
-                    })
+                    // This is a `break`-able block
+                    let exit_block = this.cfg.start_new_block();
+                    let block_exit =
+                        this.in_breakable_scope(None, exit_block, destination, |this| {
+                            this.ast_block_stmts(destination, block, span, stmts, expr, safety_mode)
+                        });
+                    this.cfg.goto(unpack!(block_exit), source_info, exit_block);
+                    exit_block.unit()
                 } else {
                     this.ast_block_stmts(destination, block, span, stmts, expr, safety_mode)
                 }
diff --git a/src/librustc_mir_build/build/expr/into.rs b/src/librustc_mir_build/build/expr/into.rs
index d5d1ddc5b7d..e402b2d1596 100644
--- a/src/librustc_mir_build/build/expr/into.rs
+++ b/src/librustc_mir_build/build/expr/into.rs
@@ -135,19 +135,23 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 // body, even when the exact code in the body cannot unwind
 
                 let loop_block = this.cfg.start_new_block();
+                let exit_block = this.cfg.start_new_block();
 
                 // Start the loop.
                 this.cfg.goto(block, source_info, loop_block);
 
-                this.in_breakable_scope(Some(loop_block), destination, expr_span, move |this| {
+                this.in_breakable_scope(Some(loop_block), exit_block, destination, move |this| {
                     // conduct the test, if necessary
                     let body_block = this.cfg.start_new_block();
+                    let diverge_cleanup = this.diverge_cleanup();
                     this.cfg.terminate(
                         loop_block,
                         source_info,
-                        TerminatorKind::FalseUnwind { real_target: body_block, unwind: None },
+                        TerminatorKind::FalseUnwind {
+                            real_target: body_block,
+                            unwind: Some(diverge_cleanup),
+                        },
                     );
-                    this.diverge_from(loop_block);
 
                     // The “return” value of the loop body must always be an unit. We therefore
                     // introduce a unit temporary as the destination for the loop body.
@@ -155,10 +159,8 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                     // Execute the body, branching back to the test.
                     let body_block_end = unpack!(this.into(tmp, body_block, body));
                     this.cfg.goto(body_block_end, source_info, loop_block);
-
-                    // Loops are only exited by `break` expressions.
-                    None
-                })
+                });
+                exit_block.unit()
             }
             ExprKind::Call { ty, fun, args, from_hir_call } => {
                 let intrinsic = match ty.kind {
@@ -200,6 +202,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                         .collect();
 
                     let success = this.cfg.start_new_block();
+                    let cleanup = this.diverge_cleanup();
 
                     this.record_operands_moved(&args);
 
@@ -209,7 +212,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                         TerminatorKind::Call {
                             func: fun,
                             args,
-                            cleanup: None,
+                            cleanup: Some(cleanup),
                             // FIXME(varkor): replace this with an uninhabitedness-based check.
                             // This requires getting access to the current module to call
                             // `tcx.is_ty_uninhabited_from`, which is currently tricky to do.
@@ -221,7 +224,6 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                             from_hir_call,
                         },
                     );
-                    this.diverge_from(block);
                     success.unit()
                 }
             }
@@ -425,12 +427,12 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 let scope = this.local_scope();
                 let value = unpack!(block = this.as_operand(block, scope, value));
                 let resume = this.cfg.start_new_block();
+                let cleanup = this.generator_drop_cleanup();
                 this.cfg.terminate(
                     block,
                     source_info,
-                    TerminatorKind::Yield { value, resume, resume_arg: destination, drop: None },
+                    TerminatorKind::Yield { value, resume, resume_arg: destination, drop: cleanup },
                 );
-                this.generator_drop_cleanup(block);
                 resume.unit()
             }
 
diff --git a/src/librustc_mir_build/build/matches/mod.rs b/src/librustc_mir_build/build/matches/mod.rs
index 147c09d8f3a..3b448b0cf27 100644
--- a/src/librustc_mir_build/build/matches/mod.rs
+++ b/src/librustc_mir_build/build/matches/mod.rs
@@ -225,6 +225,8 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         outer_source_info: SourceInfo,
         fake_borrow_temps: Vec<(Place<'tcx>, Local)>,
     ) -> BlockAnd<()> {
+        let match_scope = self.scopes.topmost();
+
         let arm_end_blocks: Vec<_> = arm_candidates
             .into_iter()
             .map(|(arm, candidate)| {
@@ -245,7 +247,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                     let arm_block = this.bind_pattern(
                         outer_source_info,
                         candidate,
-                        arm.guard.as_ref(),
+                        arm.guard.as_ref().map(|g| (g, match_scope)),
                         &fake_borrow_temps,
                         scrutinee_span,
                         Some(arm.scope),
@@ -282,7 +284,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         &mut self,
         outer_source_info: SourceInfo,
         candidate: Candidate<'_, 'tcx>,
-        guard: Option<&Guard<'tcx>>,
+        guard: Option<(&Guard<'tcx>, region::Scope)>,
         fake_borrow_temps: &Vec<(Place<'tcx>, Local)>,
         scrutinee_span: Span,
         arm_scope: Option<region::Scope>,
@@ -1588,7 +1590,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         &mut self,
         candidate: Candidate<'pat, 'tcx>,
         parent_bindings: &[(Vec<Binding<'tcx>>, Vec<Ascription<'tcx>>)],
-        guard: Option<&Guard<'tcx>>,
+        guard: Option<(&Guard<'tcx>, region::Scope)>,
         fake_borrows: &Vec<(Place<'tcx>, Local)>,
         scrutinee_span: Span,
         schedule_drops: bool,
@@ -1700,7 +1702,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         //      the reference that we create for the arm.
         //    * So we eagerly create the reference for the arm and then take a
         //      reference to that.
-        if let Some(guard) = guard {
+        if let Some((guard, region_scope)) = guard {
             let tcx = self.hir.tcx();
             let bindings = parent_bindings
                 .iter()
@@ -1744,7 +1746,12 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 unreachable
             });
             let outside_scope = self.cfg.start_new_block();
-            self.exit_top_scope(otherwise_post_guard_block, outside_scope, source_info);
+            self.exit_scope(
+                source_info.span,
+                region_scope,
+                otherwise_post_guard_block,
+                outside_scope,
+            );
             self.false_edges(
                 outside_scope,
                 otherwise_block,
diff --git a/src/librustc_mir_build/build/matches/test.rs b/src/librustc_mir_build/build/matches/test.rs
index 1eab5848e09..74398ca8a40 100644
--- a/src/librustc_mir_build/build/matches/test.rs
+++ b/src/librustc_mir_build/build/matches/test.rs
@@ -423,6 +423,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         let bool_ty = self.hir.bool_ty();
         let eq_result = self.temp(bool_ty, source_info.span);
         let eq_block = self.cfg.start_new_block();
+        let cleanup = self.diverge_cleanup();
         self.cfg.terminate(
             block,
             source_info,
@@ -440,11 +441,10 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                 }),
                 args: vec![val, expect],
                 destination: Some((eq_result, eq_block)),
-                cleanup: None,
+                cleanup: Some(cleanup),
                 from_hir_call: false,
             },
         );
-        self.diverge_from(block);
 
         if let [success_block, fail_block] = *make_target_blocks(self) {
             // check the result
diff --git a/src/librustc_mir_build/build/mod.rs b/src/librustc_mir_build/build/mod.rs
index 3d821aa55a1..2efe93d057b 100644
--- a/src/librustc_mir_build/build/mod.rs
+++ b/src/librustc_mir_build/build/mod.rs
@@ -327,6 +327,11 @@ struct Builder<'a, 'tcx> {
 
     var_debug_info: Vec<VarDebugInfo<'tcx>>,
 
+    /// Cached block with the `RESUME` terminator; this is created
+    /// when first set of cleanups are built.
+    cached_resume_block: Option<BasicBlock>,
+    /// Cached block with the `RETURN` terminator.
+    cached_return_block: Option<BasicBlock>,
     /// Cached block with the `UNREACHABLE` terminator.
     cached_unreachable_block: Option<BasicBlock>,
 }
@@ -585,34 +590,50 @@ where
         region::Scope { id: body.value.hir_id.local_id, data: region::ScopeData::CallSite };
     let arg_scope =
         region::Scope { id: body.value.hir_id.local_id, data: region::ScopeData::Arguments };
+    let mut block = START_BLOCK;
     let source_info = builder.source_info(span);
     let call_site_s = (call_site_scope, source_info);
-    unpack!(builder.in_scope(call_site_s, LintLevel::Inherited, |builder| {
-        let arg_scope_s = (arg_scope, source_info);
-        // Attribute epilogue to function's closing brace
-        let fn_end = span.shrink_to_hi();
-        let return_block =
-            unpack!(builder.in_breakable_scope(None, Place::return_place(), fn_end, |builder| {
-                Some(builder.in_scope(arg_scope_s, LintLevel::Inherited, |builder| {
-                    builder.args_and_body(
-                        START_BLOCK,
-                        fn_def_id.to_def_id(),
-                        &arguments,
-                        arg_scope,
-                        &body.value,
-                    )
-                }))
-            }));
-        let source_info = builder.source_info(fn_end);
-        builder.cfg.terminate(return_block, source_info, TerminatorKind::Return);
-        let should_abort = should_abort_on_panic(tcx, fn_def_id, abi);
-        builder.build_drop_trees(should_abort);
-        // Attribute any unreachable codepaths to the function's closing brace
-        if let Some(unreachable_block) = builder.cached_unreachable_block {
-            builder.cfg.terminate(unreachable_block, source_info, TerminatorKind::Unreachable);
-        }
-        return_block.unit()
-    }));
+    unpack!(
+        block = builder.in_scope(call_site_s, LintLevel::Inherited, |builder| {
+            if should_abort_on_panic(tcx, fn_def_id, abi) {
+                builder.schedule_abort();
+            }
+
+            let arg_scope_s = (arg_scope, source_info);
+            // `return_block` is called when we evaluate a `return` expression, so
+            // we just use `START_BLOCK` here.
+            unpack!(
+                block = builder.in_breakable_scope(
+                    None,
+                    START_BLOCK,
+                    Place::return_place(),
+                    |builder| {
+                        builder.in_scope(arg_scope_s, LintLevel::Inherited, |builder| {
+                            builder.args_and_body(
+                                block,
+                                fn_def_id.to_def_id(),
+                                &arguments,
+                                arg_scope,
+                                &body.value,
+                            )
+                        })
+                    },
+                )
+            );
+            // Attribute epilogue to function's closing brace
+            let fn_end = span.shrink_to_hi();
+            let source_info = builder.source_info(fn_end);
+            let return_block = builder.return_block();
+            builder.cfg.goto(block, source_info, return_block);
+            builder.cfg.terminate(return_block, source_info, TerminatorKind::Return);
+            // Attribute any unreachable codepaths to the function's closing brace
+            if let Some(unreachable_block) = builder.cached_unreachable_block {
+                builder.cfg.terminate(unreachable_block, source_info, TerminatorKind::Unreachable);
+            }
+            return_block.unit()
+        })
+    );
+    assert_eq!(block, builder.return_block());
 
     let spread_arg = if abi == Abi::RustCall {
         // RustCall pseudo-ABI untuples the last argument.
@@ -646,7 +667,8 @@ fn construct_const<'a, 'tcx>(
     let source_info = builder.source_info(span);
     builder.cfg.terminate(block, source_info, TerminatorKind::Return);
 
-    builder.build_drop_trees(false);
+    // Constants can't `return` so a return block should not be created.
+    assert_eq!(builder.cached_return_block, None);
 
     // Constants may be match expressions in which case an unreachable block may
     // be created, so terminate it properly.
@@ -713,7 +735,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             fn_span: span,
             arg_count,
             generator_kind,
-            scopes: scope::Scopes::new(),
+            scopes: Default::default(),
             block_context: BlockContext::new(),
             source_scopes: IndexVec::new(),
             source_scope: OUTERMOST_SOURCE_SCOPE,
@@ -726,6 +748,8 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             var_indices: Default::default(),
             unit_temp: None,
             var_debug_info: vec![],
+            cached_resume_block: None,
+            cached_return_block: None,
             cached_unreachable_block: None,
         };
 
@@ -957,6 +981,17 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             }
         }
     }
+
+    fn return_block(&mut self) -> BasicBlock {
+        match self.cached_return_block {
+            Some(rb) => rb,
+            None => {
+                let rb = self.cfg.start_new_block();
+                self.cached_return_block = Some(rb);
+                rb
+            }
+        }
+    }
 }
 
 ///////////////////////////////////////////////////////////////////////////
diff --git a/src/librustc_mir_build/build/scope.rs b/src/librustc_mir_build/build/scope.rs
index 868fb69abe8..4daf567d7d4 100644
--- a/src/librustc_mir_build/build/scope.rs
+++ b/src/librustc_mir_build/build/scope.rs
@@ -6,31 +6,30 @@ contents, and then pop it off. Every scope is named by a
 
 ### SEME Regions
 
-When pushing a new [Scope], we record the current point in the graph (a
+When pushing a new scope, we record the current point in the graph (a
 basic block); this marks the entry to the scope. We then generate more
 stuff in the control-flow graph. Whenever the scope is exited, either
 via a `break` or `return` or just by fallthrough, that marks an exit
 from the scope. Each lexical scope thus corresponds to a single-entry,
 multiple-exit (SEME) region in the control-flow graph.
 
-For now, we record the `region::Scope` to each SEME region for later reference
-(see caveat in next paragraph). This is because destruction scopes are tied to
-them. This may change in the future so that MIR lowering determines its own
-destruction scopes.
+For now, we keep a mapping from each `region::Scope` to its
+corresponding SEME region for later reference (see caveat in next
+paragraph). This is because region scopes are tied to
+them. Eventually, when we shift to non-lexical lifetimes, there should
+be no need to remember this mapping.
 
 ### Not so SEME Regions
 
 In the course of building matches, it sometimes happens that certain code
 (namely guards) gets executed multiple times. This means that the scope lexical
 scope may in fact correspond to multiple, disjoint SEME regions. So in fact our
-mapping is from one scope to a vector of SEME regions. Since the SEME regions
-are disjoint, the mapping is still one-to-one for the set of SEME regions that
-we're currently in.
+mapping is from one scope to a vector of SEME regions.
 
-Also in matches, the scopes assigned to arms are not always even SEME regions!
-Each arm has a single region with one entry for each pattern. We manually
+Also in matches, the scopes assigned to arms are not even SEME regions! Each
+arm has a single region with one entry for each pattern. We manually
 manipulate the scheduled drops in this scope to avoid dropping things multiple
-times.
+times, although drop elaboration would clean this up for value drops.
 
 ### Drops
 
@@ -61,48 +60,38 @@ that for now); any later drops would also drop `y`.
 
 There are numerous "normal" ways to early exit a scope: `break`,
 `continue`, `return` (panics are handled separately). Whenever an
-early exit occurs, the method `break_scope` is called. It is given the
+early exit occurs, the method `exit_scope` is called. It is given the
 current point in execution where the early exit occurs, as well as the
 scope you want to branch to (note that all early exits from to some
-other enclosing scope). `break_scope` will record the set of drops currently
-scheduled in a [DropTree]. Later, before `in_breakable_scope` exits, the drops
-will be added to the CFG.
+other enclosing scope). `exit_scope` will record this exit point and
+also add all drops.
 
-Panics are handled in a similar fashion, except that the drops are added to the
-MIR once the rest of the function has finished being lowered. If a terminator
-can panic, call `diverge_from(block)` with the block containing the terminator
-`block`.
+Panics are handled in a similar fashion, except that a panic always
+returns out to the `DIVERGE_BLOCK`. To trigger a panic, simply call
+`panic(p)` with the current point `p`. Or else you can call
+`diverge_cleanup`, which will produce a block that you can branch to
+which does the appropriate cleanup and then diverges. `panic(p)`
+simply calls `diverge_cleanup()` and adds an edge from `p` to the
+result.
 
-### Breakable scopes
+### Loop scopes
 
 In addition to the normal scope stack, we track a loop scope stack
-that contains only loops and breakable blocks. It tracks where a `break`,
-`continue` or `return` should go to.
+that contains only loops. It tracks where a `break` and `continue`
+should go to.
 
 */
 
 use crate::build::{BlockAnd, BlockAndExtension, BlockFrame, Builder, CFG};
 use crate::hair::{Expr, ExprRef, LintLevel};
-use rustc_data_structures::fx::FxHashMap;
-use rustc_hir as hir;
-use rustc_index::vec::IndexVec;
 use rustc_middle::middle::region;
 use rustc_middle::mir::*;
+use rustc_data_structures::fx::FxHashMap;
+use rustc_hir as hir;
+use rustc_hir::GeneratorKind;
 use rustc_span::{Span, DUMMY_SP};
-
-#[derive(Debug)]
-pub struct Scopes<'tcx> {
-    scopes: Vec<Scope>,
-    /// The current set of breakable scopes. See module comment for more details.
-    breakable_scopes: Vec<BreakableScope<'tcx>>,
-
-    /// Drops that need to be done on unwind paths. See the comment on
-    /// [DropTree] for more details.
-    unwind_drops: DropTree,
-
-    /// Drops that need to be done on paths to the `GeneratorDrop` terminator.
-    generator_drops: DropTree,
-}
+use std::collections::hash_map::Entry;
+use std::mem;
 
 #[derive(Debug)]
 struct Scope {
@@ -123,45 +112,73 @@ struct Scope {
 
     moved_locals: Vec<Local>,
 
-    /// The drop index that will drop everything in and below this scope on an
-    /// unwind path.
-    cached_unwind_block: Option<DropIdx>,
+    /// The cache for drop chain on “normal” exit into a particular BasicBlock.
+    cached_exits: FxHashMap<(BasicBlock, region::Scope), BasicBlock>,
+
+    /// The cache for drop chain on "generator drop" exit.
+    cached_generator_drop: Option<BasicBlock>,
 
-    /// The drop index that will drop everything in and below this scope on a
-    /// generator drop path.
-    cached_generator_drop_block: Option<DropIdx>,
+    /// The cache for drop chain on "unwind" exit.
+    cached_unwind: CachedBlock,
 }
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Debug, Default)]
+crate struct Scopes<'tcx> {
+    scopes: Vec<Scope>,
+    /// The current set of breakable scopes. See module comment for more details.
+    breakable_scopes: Vec<BreakableScope<'tcx>>,
+}
+
+#[derive(Debug)]
 struct DropData {
-    /// The `Span` where drop obligation was incurred (typically where place was
-    /// declared)
-    source_info: SourceInfo,
+    /// span where drop obligation was incurred (typically where place was declared)
+    span: Span,
 
     /// local to drop
     local: Local,
 
     /// Whether this is a value Drop or a StorageDead.
     kind: DropKind,
+
+    /// The cached blocks for unwinds.
+    cached_block: CachedBlock,
+}
+
+#[derive(Debug, Default, Clone, Copy)]
+struct CachedBlock {
+    /// The cached block for the cleanups-on-diverge path. This block
+    /// contains code to run the current drop and all the preceding
+    /// drops (i.e., those having lower index in Drop’s Scope drop
+    /// array)
+    unwind: Option<BasicBlock>,
+
+    /// The cached block for unwinds during cleanups-on-generator-drop path
+    ///
+    /// This is split from the standard unwind path here to prevent drop
+    /// elaboration from creating drop flags that would have to be captured
+    /// by the generator. I'm not sure how important this optimization is,
+    /// but it is here.
+    generator_drop: Option<BasicBlock>,
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[derive(Debug, PartialEq, Eq)]
 pub(crate) enum DropKind {
     Value,
     Storage,
 }
 
-#[derive(Debug)]
+#[derive(Clone, Debug)]
 struct BreakableScope<'tcx> {
     /// Region scope of the loop
     region_scope: region::Scope,
+    /// Where the body of the loop begins. `None` if block
+    continue_block: Option<BasicBlock>,
+    /// Block to branch into when the loop or block terminates (either by being
+    /// `break`-en out from, or by having its condition to become false)
+    break_block: BasicBlock,
     /// The destination of the loop/block expression itself (i.e., where to put
-    /// the result of a `break` or `return` expression)
+    /// the result of a `break` expression)
     break_destination: Place<'tcx>,
-    /// Drops that happen on the `break`/`return` path.
-    break_drops: DropTree,
-    /// Drops that happen on the `continue` path.
-    continue_drops: Option<DropTree>,
 }
 
 /// The target of an expression that breaks out of a scope
@@ -172,33 +189,61 @@ crate enum BreakableTarget {
     Return,
 }
 
-rustc_index::newtype_index! {
-    struct DropIdx { .. }
-}
+impl CachedBlock {
+    fn invalidate(&mut self) {
+        *self = CachedBlock::default();
+    }
 
-const ROOT_NODE: DropIdx = DropIdx::from_u32(0);
+    fn get(&self, generator_drop: bool) -> Option<BasicBlock> {
+        if generator_drop { self.generator_drop } else { self.unwind }
+    }
 
-/// A tree of drops that we have deferred lowering. It's used for:
-///
-/// * Drops on unwind paths
-/// * Drops on generator drop paths (when a suspended generator is dropped)
-/// * Drops on return and loop exit paths
-///
-/// Once no more nodes could be added to the tree, we lower it to MIR in one go
-/// in `build_drop_tree`.
-#[derive(Debug)]
-struct DropTree {
-    /// Drops in the tree.
-    drops: IndexVec<DropIdx, (DropData, DropIdx)>,
-    /// Map for finding the inverse of the `next_drop` relation:
-    ///
-    /// `previous_drops[(drops[i].1, drops[i].0.local, drops[i].0.kind] == i`
-    previous_drops: FxHashMap<(DropIdx, Local, DropKind), DropIdx>,
-    /// Edges into the `DropTree` that need to be added once it's lowered.
-    entry_points: Vec<(DropIdx, BasicBlock)>,
+    fn ref_mut(&mut self, generator_drop: bool) -> &mut Option<BasicBlock> {
+        if generator_drop { &mut self.generator_drop } else { &mut self.unwind }
+    }
 }
 
 impl Scope {
+    /// Invalidates all the cached blocks in the scope.
+    ///
+    /// Should always be run for all inner scopes when a drop is pushed into some scope enclosing a
+    /// larger extent of code.
+    ///
+    /// `storage_only` controls whether to invalidate only drop paths that run `StorageDead`.
+    /// `this_scope_only` controls whether to invalidate only drop paths that refer to the current
+    /// top-of-scope (as opposed to dependent scopes).
+    fn invalidate_cache(
+        &mut self,
+        storage_only: bool,
+        generator_kind: Option<GeneratorKind>,
+        this_scope_only: bool,
+    ) {
+        // FIXME: maybe do shared caching of `cached_exits` etc. to handle functions
+        // with lots of `try!`?
+
+        // cached exits drop storage and refer to the top-of-scope
+        self.cached_exits.clear();
+
+        // the current generator drop and unwind refer to top-of-scope
+        self.cached_generator_drop = None;
+
+        let ignore_unwinds = storage_only && generator_kind.is_none();
+        if !ignore_unwinds {
+            self.cached_unwind.invalidate();
+        }
+
+        if !ignore_unwinds && !this_scope_only {
+            for drop_data in &mut self.drops {
+                drop_data.cached_block.invalidate();
+            }
+        }
+    }
+
+    /// Given a span and this scope's source scope, make a SourceInfo.
+    fn source_info(&self, span: Span) -> SourceInfo {
+        SourceInfo { span, scope: self.source_scope }
+    }
+
     /// Whether there's anything to do for the cleanup path, that is,
     /// when unwinding through this scope. This includes destructors,
     /// but not StorageDead statements, which don't get emitted at all
@@ -216,189 +261,11 @@ impl Scope {
             DropKind::Storage => false,
         })
     }
-
-    fn invalidate_cache(&mut self) {
-        self.cached_unwind_block = None;
-        self.cached_generator_drop_block = None;
-    }
-}
-
-/// A trait that determined how [DropTree::build_mir] creates its blocks and
-/// links to any entry nodes.
-trait DropTreeBuilder<'tcx> {
-    /// Create a new block for the tree. This should call either
-    /// `cfg.start_new_block()` or `cfg.start_new_cleanup_block()`.
-    fn make_block(cfg: &mut CFG<'tcx>) -> BasicBlock;
-
-    /// Links a block outside the drop tree, `from`, to the block `to` inside
-    /// the drop tree.
-    fn add_entry(cfg: &mut CFG<'tcx>, from: BasicBlock, to: BasicBlock);
-}
-
-impl DropTree {
-    fn new() -> Self {
-        // The root node of the tree doesn't represent a drop, but instead
-        // represents the block in the tree that should be jumped to once all
-        // of the required drops have been performed.
-        let fake_source_info = SourceInfo::outermost(DUMMY_SP);
-        let fake_data =
-            DropData { source_info: fake_source_info, local: Local::MAX, kind: DropKind::Storage };
-        let drop_idx = DropIdx::MAX;
-        let drops = IndexVec::from_elem_n((fake_data, drop_idx), 1);
-        Self { drops, entry_points: Vec::new(), previous_drops: FxHashMap::default() }
-    }
-
-    fn add_drop(&mut self, drop: DropData, next: DropIdx) -> DropIdx {
-        let drops = &mut self.drops;
-        *self
-            .previous_drops
-            .entry((next, drop.local, drop.kind))
-            .or_insert_with(|| drops.push((drop, next)))
-    }
-
-    fn add_entry(&mut self, from: BasicBlock, to: DropIdx) {
-        debug_assert!(to < self.drops.next_index());
-        self.entry_points.push((to, from));
-    }
-
-    /// Builds the MIR for a given drop tree.
-    ///
-    /// `blocks` should have the same length as `self.drops`, and may have its
-    /// first value set to some already existing block.
-    fn build_mir<'tcx, T: DropTreeBuilder<'tcx>>(
-        &mut self,
-        cfg: &mut CFG<'tcx>,
-        blocks: &mut IndexVec<DropIdx, Option<BasicBlock>>,
-    ) {
-        debug!("DropTree::build_mir(drops = {:#?})", self);
-        assert_eq!(blocks.len(), self.drops.len());
-
-        self.assign_blocks::<T>(cfg, blocks);
-        self.link_blocks(cfg, blocks)
-    }
-
-    /// Assign blocks for all of the drops in the drop tree that need them.
-    fn assign_blocks<'tcx, T: DropTreeBuilder<'tcx>>(
-        &mut self,
-        cfg: &mut CFG<'tcx>,
-        blocks: &mut IndexVec<DropIdx, Option<BasicBlock>>,
-    ) {
-        // StorageDead statements can share blocks with each other and also with
-        // a Drop terminator. We iterate through the drops to find which drops
-        // need their own block.
-        #[derive(Clone, Copy)]
-        enum Block {
-            // This drop is unreachable
-            None,
-            // This drop is only reachable through the `StorageDead` with the
-            // specified index.
-            Shares(DropIdx),
-            // This drop has more than one way of being reached, or it is
-            // branched to from outside the tree, or its predecessor is a
-            // `Value` drop.
-            Own,
-        }
-
-        let mut needs_block = IndexVec::from_elem(Block::None, &self.drops);
-        if blocks[ROOT_NODE].is_some() {
-            // In some cases (such as drops for `continue`) the root node
-            // already has a block. In this case, make sure that we don't
-            // override it.
-            needs_block[ROOT_NODE] = Block::Own;
-        }
-
-        // Sort so that we only need to check the last value.
-        let entry_points = &mut self.entry_points;
-        entry_points.sort();
-
-        for (drop_idx, drop_data) in self.drops.iter_enumerated().rev() {
-            if entry_points.last().map_or(false, |entry_point| entry_point.0 == drop_idx) {
-                let block = *blocks[drop_idx].get_or_insert_with(|| T::make_block(cfg));
-                needs_block[drop_idx] = Block::Own;
-                while entry_points.last().map_or(false, |entry_point| entry_point.0 == drop_idx) {
-                    let entry_block = entry_points.pop().unwrap().1;
-                    T::add_entry(cfg, entry_block, block);
-                }
-            }
-            match needs_block[drop_idx] {
-                Block::None => continue,
-                Block::Own => {
-                    blocks[drop_idx].get_or_insert_with(|| T::make_block(cfg));
-                }
-                Block::Shares(pred) => {
-                    blocks[drop_idx] = blocks[pred];
-                }
-            }
-            if let DropKind::Value = drop_data.0.kind {
-                needs_block[drop_data.1] = Block::Own;
-            } else {
-                if drop_idx != ROOT_NODE {
-                    match &mut needs_block[drop_data.1] {
-                        pred @ Block::None => *pred = Block::Shares(drop_idx),
-                        pred @ Block::Shares(_) => *pred = Block::Own,
-                        Block::Own => (),
-                    }
-                }
-            }
-        }
-
-        debug!("assign_blocks: blocks = {:#?}", blocks);
-        assert!(entry_points.is_empty());
-    }
-
-    fn link_blocks<'tcx>(
-        &self,
-        cfg: &mut CFG<'tcx>,
-        blocks: &IndexVec<DropIdx, Option<BasicBlock>>,
-    ) {
-        for (drop_idx, drop_data) in self.drops.iter_enumerated().rev() {
-            let block = if let Some(block) = blocks[drop_idx] {
-                block
-            } else {
-                continue;
-            };
-            match drop_data.0.kind {
-                DropKind::Value => {
-                    let terminator = TerminatorKind::Drop {
-                        target: blocks[drop_data.1].unwrap(),
-                        // The caller will handle this if needed.
-                        unwind: None,
-                        location: drop_data.0.local.into(),
-                    };
-                    cfg.terminate(block, drop_data.0.source_info, terminator);
-                }
-                // Root nodes don't correspond to a drop.
-                DropKind::Storage if drop_idx == ROOT_NODE => {}
-                DropKind::Storage => {
-                    let stmt = Statement {
-                        source_info: drop_data.0.source_info,
-                        kind: StatementKind::StorageDead(drop_data.0.local),
-                    };
-                    cfg.push(block, stmt);
-                    let target = blocks[drop_data.1].unwrap();
-                    if target != block {
-                        // Diagnostics don't use this `Span` but debuginfo
-                        // might. Since we don't want breakpoints to be placed
-                        // here, especially when this is on an unwind path, we
-                        // use `DUMMY_SP`.
-                        let source_info = SourceInfo { span: DUMMY_SP, ..drop_data.0.source_info };
-                        let terminator = TerminatorKind::Goto { target };
-                        cfg.terminate(block, source_info, terminator);
-                    }
-                }
-            }
-        }
-    }
 }
 
 impl<'tcx> Scopes<'tcx> {
-    pub(crate) fn new() -> Self {
-        Self {
-            scopes: Vec::new(),
-            breakable_scopes: Vec::new(),
-            unwind_drops: DropTree::new(),
-            generator_drops: DropTree::new(),
-        }
+    fn len(&self) -> usize {
+        self.scopes.len()
     }
 
     fn push_scope(&mut self, region_scope: (region::Scope, SourceInfo), vis_scope: SourceScope) {
@@ -409,29 +276,94 @@ impl<'tcx> Scopes<'tcx> {
             region_scope_span: region_scope.1.span,
             drops: vec![],
             moved_locals: vec![],
-            cached_unwind_block: None,
-            cached_generator_drop_block: None,
+            cached_generator_drop: None,
+            cached_exits: Default::default(),
+            cached_unwind: CachedBlock::default(),
         });
     }
 
-    fn pop_scope(&mut self, region_scope: (region::Scope, SourceInfo)) -> Scope {
+    fn pop_scope(
+        &mut self,
+        region_scope: (region::Scope, SourceInfo),
+    ) -> (Scope, Option<BasicBlock>) {
         let scope = self.scopes.pop().unwrap();
         assert_eq!(scope.region_scope, region_scope.0);
-        scope
+        let unwind_to =
+            self.scopes.last().and_then(|next_scope| next_scope.cached_unwind.get(false));
+        (scope, unwind_to)
+    }
+
+    fn may_panic(&self, scope_count: usize) -> bool {
+        let len = self.len();
+        self.scopes[(len - scope_count)..].iter().any(|s| s.needs_cleanup())
+    }
+
+    /// Finds the breakable scope for a given label. This is used for
+    /// resolving `return`, `break` and `continue`.
+    fn find_breakable_scope(
+        &self,
+        span: Span,
+        target: BreakableTarget,
+    ) -> (BasicBlock, region::Scope, Option<Place<'tcx>>) {
+        let get_scope = |scope: region::Scope| {
+            // find the loop-scope by its `region::Scope`.
+            self.breakable_scopes
+                .iter()
+                .rfind(|breakable_scope| breakable_scope.region_scope == scope)
+                .unwrap_or_else(|| span_bug!(span, "no enclosing breakable scope found"))
+        };
+        match target {
+            BreakableTarget::Return => {
+                let scope = &self.breakable_scopes[0];
+                if scope.break_destination != Place::return_place() {
+                    span_bug!(span, "`return` in item with no return scope");
+                }
+                (scope.break_block, scope.region_scope, Some(scope.break_destination))
+            }
+            BreakableTarget::Break(scope) => {
+                let scope = get_scope(scope);
+                (scope.break_block, scope.region_scope, Some(scope.break_destination))
+            }
+            BreakableTarget::Continue(scope) => {
+                let scope = get_scope(scope);
+                let continue_block = scope
+                    .continue_block
+                    .unwrap_or_else(|| span_bug!(span, "missing `continue` block"));
+                (continue_block, scope.region_scope, None)
+            }
+        }
     }
 
-    fn scope_index(&self, region_scope: region::Scope, span: Span) -> usize {
-        self.scopes
+    fn num_scopes_above(&self, region_scope: region::Scope, span: Span) -> usize {
+        let scope_count = self
+            .scopes
             .iter()
-            .rposition(|scope| scope.region_scope == region_scope)
-            .unwrap_or_else(|| span_bug!(span, "region_scope {:?} does not enclose", region_scope))
+            .rev()
+            .position(|scope| scope.region_scope == region_scope)
+            .unwrap_or_else(|| span_bug!(span, "region_scope {:?} does not enclose", region_scope));
+        let len = self.len();
+        assert!(scope_count < len, "should not use `exit_scope` to pop ALL scopes");
+        scope_count
+    }
+
+    fn iter_mut(&mut self) -> impl DoubleEndedIterator<Item = &mut Scope> + '_ {
+        self.scopes.iter_mut().rev()
+    }
+
+    fn top_scopes(&mut self, count: usize) -> impl DoubleEndedIterator<Item = &mut Scope> + '_ {
+        let len = self.len();
+        self.scopes[len - count..].iter_mut()
     }
 
     /// Returns the topmost active scope, which is known to be alive until
     /// the next scope expression.
-    fn topmost(&self) -> region::Scope {
+    pub(super) fn topmost(&self) -> region::Scope {
         self.scopes.last().expect("topmost_scope: no scopes present").region_scope
     }
+
+    fn source_info(&self, index: usize, span: Span) -> SourceInfo {
+        self.scopes[self.len() - index].source_info(span)
+    }
 }
 
 impl<'a, 'tcx> Builder<'a, 'tcx> {
@@ -439,50 +371,28 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
     // ==========================
     //  Start a breakable scope, which tracks where `continue`, `break` and
     //  `return` should branch to.
-    crate fn in_breakable_scope<F>(
+    crate fn in_breakable_scope<F, R>(
         &mut self,
         loop_block: Option<BasicBlock>,
+        break_block: BasicBlock,
         break_destination: Place<'tcx>,
-        span: Span,
         f: F,
-    ) -> BlockAnd<()>
+    ) -> R
     where
-        F: FnOnce(&mut Builder<'a, 'tcx>) -> Option<BlockAnd<()>>,
+        F: FnOnce(&mut Builder<'a, 'tcx>) -> R,
     {
         let region_scope = self.scopes.topmost();
         let scope = BreakableScope {
             region_scope,
+            continue_block: loop_block,
+            break_block,
             break_destination,
-            break_drops: DropTree::new(),
-            continue_drops: loop_block.map(|_| DropTree::new()),
         };
         self.scopes.breakable_scopes.push(scope);
-        let normal_exit_block = f(self);
+        let res = f(self);
         let breakable_scope = self.scopes.breakable_scopes.pop().unwrap();
         assert!(breakable_scope.region_scope == region_scope);
-        let break_block = self.build_exit_tree(breakable_scope.break_drops, None);
-        breakable_scope.continue_drops.map(|drops| {
-            self.build_exit_tree(drops, loop_block);
-        });
-        match (normal_exit_block, break_block) {
-            (Some(block), None) | (None, Some(block)) => block,
-            (None, None) => self.cfg.start_new_block().unit(),
-            (Some(normal_block), Some(exit_block)) => {
-                let target = self.cfg.start_new_block();
-                let source_info = self.source_info(span);
-                self.cfg.terminate(
-                    unpack!(normal_block),
-                    source_info,
-                    TerminatorKind::Goto { target },
-                );
-                self.cfg.terminate(
-                    unpack!(exit_block),
-                    source_info,
-                    TerminatorKind::Goto { target },
-                );
-                target.unit()
-            }
-        }
+        res
     }
 
     crate fn in_opt_scope<F, R>(
@@ -566,51 +476,46 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         mut block: BasicBlock,
     ) -> BlockAnd<()> {
         debug!("pop_scope({:?}, {:?})", region_scope, block);
+        // If we are emitting a `drop` statement, we need to have the cached
+        // diverge cleanup pads ready in case that drop panics.
+        if self.scopes.may_panic(1) {
+            self.diverge_cleanup();
+        }
+        let (scope, unwind_to) = self.scopes.pop_scope(region_scope);
+        let unwind_to = unwind_to.unwrap_or_else(|| self.resume_block());
 
-        block = self.leave_top_scope(block);
-
-        self.scopes.pop_scope(region_scope);
+        unpack!(
+            block = build_scope_drops(
+                &mut self.cfg,
+                self.generator_kind,
+                &scope,
+                block,
+                unwind_to,
+                self.arg_count,
+                false, // not generator
+                false, // not unwind path
+            )
+        );
 
         block.unit()
     }
 
-    /// Sets up the drops for breaking from `block` to `target`.
     crate fn break_scope(
         &mut self,
         mut block: BasicBlock,
         value: Option<ExprRef<'tcx>>,
-        target: BreakableTarget,
+        scope: BreakableTarget,
         source_info: SourceInfo,
     ) -> BlockAnd<()> {
-        let span = source_info.span;
-
-        let get_scope_index = |scope: region::Scope| {
-            // find the loop-scope by its `region::Scope`.
-            self.scopes
-                .breakable_scopes
-                .iter()
-                .rposition(|breakable_scope| breakable_scope.region_scope == scope)
-                .unwrap_or_else(|| span_bug!(span, "no enclosing breakable scope found"))
-        };
-        let (break_index, destination) = match target {
-            BreakableTarget::Return => {
-                let scope = &self.scopes.breakable_scopes[0];
-                if scope.break_destination != Place::return_place() {
-                    span_bug!(span, "`return` in item with no return scope");
-                }
-                (0, Some(scope.break_destination))
-            }
-            BreakableTarget::Break(scope) => {
-                let break_index = get_scope_index(scope);
-                let scope = &self.scopes.breakable_scopes[break_index];
-                (break_index, Some(scope.break_destination))
-            }
-            BreakableTarget::Continue(scope) => {
-                let break_index = get_scope_index(scope);
-                (break_index, None)
-            }
-        };
-
+        let (mut target_block, region_scope, destination) =
+            self.scopes.find_breakable_scope(source_info.span, scope);
+        if let BreakableTarget::Return = scope {
+            // We call this now, rather than when we start lowering the
+            // function so that the return block doesn't precede the entire
+            // rest of the CFG. Some passes and LLVM prefer blocks to be in
+            // approximately CFG order.
+            target_block = self.return_block();
+        }
         if let Some(destination) = destination {
             if let Some(value) = value {
                 debug!("stmt_expr Break val block_context.push(SubExpr)");
@@ -623,57 +528,131 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         } else {
             assert!(value.is_none(), "`return` and `break` should have a destination");
         }
-
-        let region_scope = self.scopes.breakable_scopes[break_index].region_scope;
-        let scope_index = self.scopes.scope_index(region_scope, span);
-        let drops = if destination.is_some() {
-            &mut self.scopes.breakable_scopes[break_index].break_drops
-        } else {
-            self.scopes.breakable_scopes[break_index].continue_drops.as_mut().unwrap()
-        };
-        let mut drop_idx = ROOT_NODE;
-        for scope in &self.scopes.scopes[scope_index + 1..] {
-            for drop in &scope.drops {
-                drop_idx = drops.add_drop(*drop, drop_idx);
-            }
-        }
-        drops.add_entry(block, drop_idx);
-
-        // `build_drop_tree` doesn't have access to our source_info, so we
-        // create a dummy terminator now. `TerminatorKind::Resume` is used
-        // because MIR type checking will panic if it hasn't been overwritten.
-        self.cfg.terminate(block, source_info, TerminatorKind::Resume);
-
+        self.exit_scope(source_info.span, region_scope, block, target_block);
         self.cfg.start_new_block().unit()
     }
 
-    crate fn exit_top_scope(
+    /// Branch out of `block` to `target`, exiting all scopes up to
+    /// and including `region_scope`. This will insert whatever drops are
+    /// needed. See module comment for details.
+    crate fn exit_scope(
         &mut self,
+        span: Span,
+        region_scope: region::Scope,
         mut block: BasicBlock,
         target: BasicBlock,
-        source_info: SourceInfo,
     ) {
-        block = self.leave_top_scope(block);
-        self.cfg.terminate(block, source_info, TerminatorKind::Goto { target });
-    }
+        debug!(
+            "exit_scope(region_scope={:?}, block={:?}, target={:?})",
+            region_scope, block, target
+        );
+        let scope_count = self.scopes.num_scopes_above(region_scope, span);
 
-    fn leave_top_scope(&mut self, block: BasicBlock) -> BasicBlock {
         // If we are emitting a `drop` statement, we need to have the cached
         // diverge cleanup pads ready in case that drop panics.
-        let needs_cleanup = self.scopes.scopes.last().map_or(false, |scope| scope.needs_cleanup());
-        let is_generator = self.generator_kind.is_some();
-        let unwind_to = if needs_cleanup { self.diverge_cleanup() } else { DropIdx::MAX };
-
-        let scope = self.scopes.scopes.last().expect("leave_top_scope called with no scopes");
-        unpack!(build_scope_drops(
-            &mut self.cfg,
-            &mut self.scopes.unwind_drops,
-            scope,
-            block,
-            unwind_to,
-            is_generator && needs_cleanup,
-            self.arg_count,
-        ))
+        let may_panic = self.scopes.may_panic(scope_count);
+        if may_panic {
+            self.diverge_cleanup();
+        }
+
+        let mut scopes = self.scopes.top_scopes(scope_count + 1).rev();
+        let mut scope = scopes.next().unwrap();
+        for next_scope in scopes {
+            if scope.drops.is_empty() {
+                scope = next_scope;
+                continue;
+            }
+            let source_info = scope.source_info(span);
+            block = match scope.cached_exits.entry((target, region_scope)) {
+                Entry::Occupied(e) => {
+                    self.cfg.goto(block, source_info, *e.get());
+                    return;
+                }
+                Entry::Vacant(v) => {
+                    let b = self.cfg.start_new_block();
+                    self.cfg.goto(block, source_info, b);
+                    v.insert(b);
+                    b
+                }
+            };
+
+            let unwind_to = next_scope.cached_unwind.get(false).unwrap_or_else(|| {
+                debug_assert!(!may_panic, "cached block not present?");
+                START_BLOCK
+            });
+
+            unpack!(
+                block = build_scope_drops(
+                    &mut self.cfg,
+                    self.generator_kind,
+                    scope,
+                    block,
+                    unwind_to,
+                    self.arg_count,
+                    false, // not generator
+                    false, // not unwind path
+                )
+            );
+
+            scope = next_scope;
+        }
+
+        self.cfg.goto(block, self.scopes.source_info(scope_count, span), target);
+    }
+
+    /// Creates a path that performs all required cleanup for dropping a generator.
+    ///
+    /// This path terminates in GeneratorDrop. Returns the start of the path.
+    /// None indicates there’s no cleanup to do at this point.
+    crate fn generator_drop_cleanup(&mut self) -> Option<BasicBlock> {
+        // Fill in the cache for unwinds
+        self.diverge_cleanup_gen(true);
+
+        let src_info = self.scopes.source_info(self.scopes.len(), self.fn_span);
+        let resume_block = self.resume_block();
+        let mut scopes = self.scopes.iter_mut().peekable();
+        let mut block = self.cfg.start_new_block();
+        let result = block;
+
+        while let Some(scope) = scopes.next() {
+            block = if let Some(b) = scope.cached_generator_drop {
+                self.cfg.goto(block, src_info, b);
+                return Some(result);
+            } else {
+                let b = self.cfg.start_new_block();
+                scope.cached_generator_drop = Some(b);
+                self.cfg.goto(block, src_info, b);
+                b
+            };
+
+            let unwind_to = scopes
+                .peek()
+                .as_ref()
+                .map(|scope| {
+                    scope
+                        .cached_unwind
+                        .get(true)
+                        .unwrap_or_else(|| span_bug!(src_info.span, "cached block not present?"))
+                })
+                .unwrap_or(resume_block);
+
+            unpack!(
+                block = build_scope_drops(
+                    &mut self.cfg,
+                    self.generator_kind,
+                    scope,
+                    block,
+                    unwind_to,
+                    self.arg_count,
+                    true, // is generator
+                    true, // is cached path
+                )
+            );
+        }
+
+        self.cfg.terminate(block, src_info, TerminatorKind::GeneratorDrop);
+
+        Some(result)
     }
 
     /// Creates a new source scope, nested in the current one.
@@ -749,6 +728,15 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         }
     }
 
+    // Schedule an abort block - this is used for some ABIs that cannot unwind
+    crate fn schedule_abort(&mut self) -> BasicBlock {
+        let source_info = self.scopes.source_info(self.scopes.len(), self.fn_span);
+        let abortblk = self.cfg.start_new_cleanup_block();
+        self.cfg.terminate(abortblk, source_info, TerminatorKind::Abort);
+        self.cached_resume_block = Some(abortblk);
+        abortblk
+    }
+
     // Scheduling drops
     // ================
     crate fn schedule_drop_storage_and_value(
@@ -761,10 +749,11 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         self.schedule_drop(span, region_scope, local, DropKind::Value);
     }
 
-    /// Indicates that `place` should be dropped on exit from `region_scope`.
+    /// Indicates that `place` should be dropped on exit from
+    /// `region_scope`.
     ///
-    /// When called with `DropKind::Storage`, `place` shouldn't be the return
-    /// place, or a function parameter.
+    /// When called with `DropKind::Storage`, `place` should be a local
+    /// with an index higher than the current `self.arg_count`.
     crate fn schedule_drop(
         &mut self,
         span: Span,
@@ -792,74 +781,70 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
             }
         };
 
-        // When building drops, we try to cache chains of drops to reduce the
-        // number of `DropTree::add_drop` calls. This, however, means that
-        // whenever we add a drop into a scope which already had some entries
-        // in the drop tree built (and thus, cached) for it, we must invalidate
-        // all caches which might branch into the scope which had a drop just
-        // added to it. This is necessary, because otherwise some other code
-        // might use the cache to branch into already built chain of drops,
-        // essentially ignoring the newly added drop.
-        //
-        // For example consider there’s two scopes with a drop in each. These
-        // are built and thus the caches are filled:
-        //
-        // +--------------------------------------------------------+
-        // | +---------------------------------+                    |
-        // | | +--------+     +-------------+  |  +---------------+ |
-        // | | | return | <-+ | drop(outer) | <-+ |  drop(middle) | |
-        // | | +--------+     +-------------+  |  +---------------+ |
-        // | +------------|outer_scope cache|--+                    |
-        // +------------------------------|middle_scope cache|------+
-        //
-        // Now, a new, inner-most scope is added along with a new drop into
-        // both inner-most and outer-most scopes:
-        //
-        // +------------------------------------------------------------+
-        // | +----------------------------------+                       |
-        // | | +--------+      +-------------+  |   +---------------+   | +-------------+
-        // | | | return | <+   | drop(new)   | <-+  |  drop(middle) | <--+| drop(inner) |
-        // | | +--------+  |   | drop(outer) |  |   +---------------+   | +-------------+
-        // | |             +-+ +-------------+  |                       |
-        // | +---|invalid outer_scope cache|----+                       |
-        // +----=----------------|invalid middle_scope cache|-----------+
-        //
-        // If, when adding `drop(new)` we do not invalidate the cached blocks for both
-        // outer_scope and middle_scope, then, when building drops for the inner (right-most)
-        // scope, the old, cached blocks, without `drop(new)` will get used, producing the
-        // wrong results.
-        //
-        // Note that this code iterates scopes from the inner-most to the outer-most,
-        // invalidating caches of each scope visited. This way bare minimum of the
-        // caches gets invalidated. i.e., if a new drop is added into the middle scope, the
-        // cache of outer scope stays intact.
-        //
-        // Since we only cache drops for the unwind path and the generator drop
-        // path, we only need to invalidate the cache for drops that happen on
-        // the unwind or generator drop paths. This means that for
-        // non-generators we don't need to invalidate caches for `DropKind::Storage`.
-        let invalidate_caches = needs_drop || self.generator_kind.is_some();
-        for scope in self.scopes.scopes.iter_mut().rev() {
-            if invalidate_caches {
-                scope.invalidate_cache();
-            }
-
-            if scope.region_scope == region_scope {
+        for scope in self.scopes.iter_mut() {
+            let this_scope = scope.region_scope == region_scope;
+            // When building drops, we try to cache chains of drops in such a way so these drops
+            // could be reused by the drops which would branch into the cached (already built)
+            // blocks.  This, however, means that whenever we add a drop into a scope which already
+            // had some blocks built (and thus, cached) for it, we must invalidate all caches which
+            // might branch into the scope which had a drop just added to it. This is necessary,
+            // because otherwise some other code might use the cache to branch into already built
+            // chain of drops, essentially ignoring the newly added drop.
+            //
+            // For example consider there’s two scopes with a drop in each. These are built and
+            // thus the caches are filled:
+            //
+            // +--------------------------------------------------------+
+            // | +---------------------------------+                    |
+            // | | +--------+     +-------------+  |  +---------------+ |
+            // | | | return | <-+ | drop(outer) | <-+ |  drop(middle) | |
+            // | | +--------+     +-------------+  |  +---------------+ |
+            // | +------------|outer_scope cache|--+                    |
+            // +------------------------------|middle_scope cache|------+
+            //
+            // Now, a new, inner-most scope is added along with a new drop into both inner-most and
+            // outer-most scopes:
+            //
+            // +------------------------------------------------------------+
+            // | +----------------------------------+                       |
+            // | | +--------+      +-------------+  |   +---------------+   | +-------------+
+            // | | | return | <+   | drop(new)   | <-+  |  drop(middle) | <--+| drop(inner) |
+            // | | +--------+  |   | drop(outer) |  |   +---------------+   | +-------------+
+            // | |             +-+ +-------------+  |                       |
+            // | +---|invalid outer_scope cache|----+                       |
+            // +----=----------------|invalid middle_scope cache|-----------+
+            //
+            // If, when adding `drop(new)` we do not invalidate the cached blocks for both
+            // outer_scope and middle_scope, then, when building drops for the inner (right-most)
+            // scope, the old, cached blocks, without `drop(new)` will get used, producing the
+            // wrong results.
+            //
+            // The cache and its invalidation for unwind branch is somewhat special. The cache is
+            // per-drop, rather than per scope, which has a several different implications. Adding
+            // a new drop into a scope will not invalidate cached blocks of the prior drops in the
+            // scope. That is true, because none of the already existing drops will have an edge
+            // into a block with the newly added drop.
+            //
+            // Note that this code iterates scopes from the inner-most to the outer-most,
+            // invalidating caches of each scope visited. This way bare minimum of the
+            // caches gets invalidated. i.e., if a new drop is added into the middle scope, the
+            // cache of outer scope stays intact.
+            scope.invalidate_cache(!needs_drop, self.generator_kind, this_scope);
+            if this_scope {
                 let region_scope_span =
                     region_scope.span(self.hir.tcx(), &self.hir.region_scope_tree);
                 // Attribute scope exit drops to scope's closing brace.
                 let scope_end = self.hir.tcx().sess.source_map().end_point(region_scope_span);
 
                 scope.drops.push(DropData {
-                    source_info: SourceInfo { span: scope_end, scope: scope.source_scope },
+                    span: scope_end,
                     local,
                     kind: drop_kind,
+                    cached_block: CachedBlock::default(),
                 });
-
                 return;
             }
         }
-
         span_bug!(span, "region scope {:?} not in scope to drop {:?}", region_scope, local);
     }
 
@@ -908,9 +893,8 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
 
             Some(local_scope) => self
                 .scopes
-                .scopes
                 .iter_mut()
-                .rfind(|scope| scope.region_scope == local_scope)
+                .find(|scope| scope.region_scope == local_scope)
                 .unwrap_or_else(|| bug!("scope {:?} not found in scope list!", local_scope)),
         };
 
@@ -960,16 +944,13 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                     // Manually drop the condition on both branches.
                     let top_scope = self.scopes.scopes.last_mut().unwrap();
                     let top_drop_data = top_scope.drops.pop().unwrap();
-                    if self.generator_kind.is_some() {
-                        top_scope.invalidate_cache();
-                    }
 
                     match top_drop_data.kind {
                         DropKind::Value { .. } => {
                             bug!("Drop scheduled on top of condition variable")
                         }
                         DropKind::Storage => {
-                            let source_info = top_drop_data.source_info;
+                            let source_info = top_scope.source_info(top_drop_data.span);
                             let local = top_drop_data.local;
                             assert_eq!(local, cond_temp, "Drop scheduled on top of condition");
                             self.cfg.push(
@@ -982,6 +963,8 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                             );
                         }
                     }
+
+                    top_scope.invalidate_cache(true, self.generator_kind, true);
                 } else {
                     bug!("Expected as_local_operand to produce a temporary");
                 }
@@ -991,86 +974,62 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         (true_block, false_block)
     }
 
-    /// Returns the [DropIdx] for the innermost drop if the function unwound at
-    /// this point. The `DropIdx` will be created if it doesn't already exist.
-    fn diverge_cleanup(&mut self) -> DropIdx {
-        let is_generator = self.generator_kind.is_some();
-        let (uncached_scope, mut cached_drop) = self
-            .scopes
-            .scopes
-            .iter()
-            .enumerate()
-            .rev()
-            .find_map(|(scope_idx, scope)| {
-                scope.cached_unwind_block.map(|cached_block| (scope_idx + 1, cached_block))
-            })
-            .unwrap_or((0, ROOT_NODE));
-
-        for scope in &mut self.scopes.scopes[uncached_scope..] {
-            for drop in &scope.drops {
-                if is_generator || drop.kind == DropKind::Value {
-                    cached_drop = self.scopes.unwind_drops.add_drop(*drop, cached_drop);
-                }
-            }
-            scope.cached_unwind_block = Some(cached_drop);
-        }
-
-        cached_drop
-    }
-
-    /// Prepares to create a path that performs all required cleanup for a
-    /// terminator that can unwind at the given basic block.
+    /// Creates a path that performs all required cleanup for unwinding.
     ///
-    /// This path terminates in Resume. The path isn't created until after all
-    /// of the non-unwind paths in this item have been lowered.
-    crate fn diverge_from(&mut self, start: BasicBlock) {
-        debug_assert!(
-            matches!(
-                self.cfg.block_data(start).terminator().kind,
-                TerminatorKind::Assert { .. }
-                | TerminatorKind::Call {..}
-                | TerminatorKind::DropAndReplace { .. }
-                | TerminatorKind::FalseUnwind { .. }
-            ),
-            "diverge_from called on block with terminator that cannot unwind."
-        );
+    /// This path terminates in Resume. Returns the start of the path.
+    /// See module comment for more details.
+    crate fn diverge_cleanup(&mut self) -> BasicBlock {
+        self.diverge_cleanup_gen(false)
+    }
 
-        let next_drop = self.diverge_cleanup();
-        self.scopes.unwind_drops.add_entry(start, next_drop);
+    fn resume_block(&mut self) -> BasicBlock {
+        if let Some(target) = self.cached_resume_block {
+            target
+        } else {
+            let resumeblk = self.cfg.start_new_cleanup_block();
+            self.cfg.terminate(
+                resumeblk,
+                SourceInfo::outermost(self.fn_span),
+                TerminatorKind::Resume,
+            );
+            self.cached_resume_block = Some(resumeblk);
+            resumeblk
+        }
     }
 
-    /// Sets up a path that performs all required cleanup for dropping a
-    /// generator, starting from the given block that ends in
-    /// [TerminatorKind::Yield].
-    ///
-    /// This path terminates in GeneratorDrop.
-    crate fn generator_drop_cleanup(&mut self, yield_block: BasicBlock) {
-        debug_assert!(
-            matches!(
-                self.cfg.block_data(yield_block).terminator().kind,
-                TerminatorKind::Yield { .. }
-            ),
-            "generator_drop_cleanup called on block with non-yield terminator."
-        );
-        let (uncached_scope, mut cached_drop) = self
-            .scopes
-            .scopes
-            .iter()
-            .enumerate()
-            .rev()
-            .find_map(|(scope_idx, scope)| {
-                scope.cached_generator_drop_block.map(|cached_block| (scope_idx + 1, cached_block))
-            })
-            .unwrap_or((0, ROOT_NODE));
-
-        for scope in &mut self.scopes.scopes[uncached_scope..] {
-            for drop in &scope.drops {
-                cached_drop = self.scopes.generator_drops.add_drop(*drop, cached_drop);
-            }
-            scope.cached_generator_drop_block = Some(cached_drop);
+    fn diverge_cleanup_gen(&mut self, generator_drop: bool) -> BasicBlock {
+        // Build up the drops in **reverse** order. The end result will
+        // look like:
+        //
+        //    scopes[n] -> scopes[n-1] -> ... -> scopes[0]
+        //
+        // However, we build this in **reverse order**. That is, we
+        // process scopes[0], then scopes[1], etc, pointing each one at
+        // the result generates from the one before. Along the way, we
+        // store caches. If everything is cached, we'll just walk right
+        // to left reading the cached results but never created anything.
+
+        // Find the last cached block
+        debug!("diverge_cleanup_gen(self.scopes = {:?})", self.scopes);
+        let cached_cleanup = self.scopes.iter_mut().enumerate().find_map(|(idx, ref scope)| {
+            let cached_block = scope.cached_unwind.get(generator_drop)?;
+            Some((cached_block, idx))
+        });
+        let (mut target, first_uncached) =
+            cached_cleanup.unwrap_or_else(|| (self.resume_block(), self.scopes.len()));
+
+        for scope in self.scopes.top_scopes(first_uncached) {
+            target = build_diverge_scope(
+                &mut self.cfg,
+                scope.region_scope_span,
+                scope,
+                target,
+                generator_drop,
+                self.generator_kind,
+            );
         }
 
-        self.scopes.generator_drops.add_entry(yield_block, cached_drop);
+        target
     }
 
     /// Utility function for *non*-scope code to build their own drops
@@ -1083,18 +1042,21 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
     ) -> BlockAnd<()> {
         let source_info = self.source_info(span);
         let next_target = self.cfg.start_new_block();
-
+        let diverge_target = self.diverge_cleanup();
         self.cfg.terminate(
             block,
             source_info,
-            TerminatorKind::DropAndReplace { location, value, target: next_target, unwind: None },
+            TerminatorKind::DropAndReplace {
+                location,
+                value,
+                target: next_target,
+                unwind: Some(diverge_target),
+            },
         );
-        self.diverge_from(block);
-
         next_target.unit()
     }
 
-    /// Creates an `Assert` terminator and return the success block.
+    /// Creates an Assert terminator and return the success block.
     /// If the boolean condition operand is not the expected value,
     /// a runtime panic will be caused with the given message.
     crate fn assert(
@@ -1106,41 +1068,51 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         span: Span,
     ) -> BasicBlock {
         let source_info = self.source_info(span);
+
         let success_block = self.cfg.start_new_block();
+        let cleanup = self.diverge_cleanup();
 
         self.cfg.terminate(
             block,
             source_info,
-            TerminatorKind::Assert { cond, expected, msg, target: success_block, cleanup: None },
+            TerminatorKind::Assert {
+                cond,
+                expected,
+                msg,
+                target: success_block,
+                cleanup: Some(cleanup),
+            },
         );
-        self.diverge_from(block);
 
         success_block
     }
 
+    // `match` arm scopes
+    // ==================
     /// Unschedules any drops in the top scope.
     ///
     /// This is only needed for `match` arm scopes, because they have one
     /// entrance per pattern, but only one exit.
-    crate fn clear_top_scope(&mut self, region_scope: region::Scope) {
+    pub(crate) fn clear_top_scope(&mut self, region_scope: region::Scope) {
         let top_scope = self.scopes.scopes.last_mut().unwrap();
 
         assert_eq!(top_scope.region_scope, region_scope);
 
         top_scope.drops.clear();
-        top_scope.invalidate_cache();
+        top_scope.invalidate_cache(false, self.generator_kind, true);
     }
 }
 
-/// Builds drops for `pop_scope` and `leave_top_scope`.
+/// Builds drops for pop_scope and exit_scope.
 fn build_scope_drops<'tcx>(
     cfg: &mut CFG<'tcx>,
-    unwind_drops: &mut DropTree,
+    generator_kind: Option<GeneratorKind>,
     scope: &Scope,
     mut block: BasicBlock,
-    mut unwind_to: DropIdx,
-    storage_dead_on_unwind: bool,
+    last_unwind_to: BasicBlock,
     arg_count: usize,
+    generator_drop: bool,
+    is_cached_path: bool,
 ) -> BlockAnd<()> {
     debug!("build_scope_drops({:?} -> {:?})", block, scope);
 
@@ -1163,43 +1135,37 @@ fn build_scope_drops<'tcx>(
     // drops for the unwind path should have already been generated by
     // `diverge_cleanup_gen`.
 
-    for drop_data in scope.drops.iter().rev() {
-        let source_info = drop_data.source_info;
+    for drop_idx in (0..scope.drops.len()).rev() {
+        let drop_data = &scope.drops[drop_idx];
+        let source_info = scope.source_info(drop_data.span);
         let local = drop_data.local;
 
         match drop_data.kind {
             DropKind::Value => {
-                // `unwind_to` should drop the value that we're about to
-                // schedule. If dropping this value panics, then we continue
-                // with the *next* value on the unwind path.
-                debug_assert_eq!(unwind_drops.drops[unwind_to].0.local, drop_data.local);
-                debug_assert_eq!(unwind_drops.drops[unwind_to].0.kind, drop_data.kind);
-                unwind_to = unwind_drops.drops[unwind_to].1;
-
                 // If the operand has been moved, and we are not on an unwind
                 // path, then don't generate the drop. (We only take this into
                 // account for non-unwind paths so as not to disturb the
                 // caching mechanism.)
-                if scope.moved_locals.iter().any(|&o| o == local) {
+                if !is_cached_path && scope.moved_locals.iter().any(|&o| o == local) {
                     continue;
                 }
 
-                unwind_drops.add_entry(block, unwind_to);
+                let unwind_to = get_unwind_to(scope, generator_kind, drop_idx, generator_drop)
+                    .unwrap_or(last_unwind_to);
 
                 let next = cfg.start_new_block();
                 cfg.terminate(
                     block,
                     source_info,
-                    TerminatorKind::Drop { location: local.into(), target: next, unwind: None },
+                    TerminatorKind::Drop {
+                        location: local.into(),
+                        target: next,
+                        unwind: Some(unwind_to),
+                    },
                 );
                 block = next;
             }
             DropKind::Storage => {
-                if storage_dead_on_unwind {
-                    debug_assert_eq!(unwind_drops.drops[unwind_to].0.local, drop_data.local);
-                    debug_assert_eq!(unwind_drops.drops[unwind_to].0.kind, drop_data.kind);
-                    unwind_to = unwind_drops.drops[unwind_to].1;
-                }
                 // Only temps and vars need their storage dead.
                 assert!(local.index() > arg_count);
                 cfg.push(block, Statement { source_info, kind: StatementKind::StorageDead(local) });
@@ -1209,189 +1175,139 @@ fn build_scope_drops<'tcx>(
     block.unit()
 }
 
-impl<'a, 'tcx: 'a> Builder<'a, 'tcx> {
-    /// Build a drop tree for a breakable scope.
-    ///
-    /// If `continue_block` is `Some`, then the tree is for `continue` inside a
-    /// loop. Otherwise this is for `break` or `return`.
-    fn build_exit_tree(
-        &mut self,
-        mut drops: DropTree,
-        continue_block: Option<BasicBlock>,
-    ) -> Option<BlockAnd<()>> {
-        let mut blocks = IndexVec::from_elem(None, &drops.drops);
-        blocks[ROOT_NODE] = continue_block;
-
-        drops.build_mir::<ExitScopes>(&mut self.cfg, &mut blocks);
-
-        // Link the exit drop tree to unwind drop tree.
-        if drops.drops.iter().any(|(drop, _)| drop.kind == DropKind::Value) {
-            let unwind_target = self.diverge_cleanup();
-            let mut unwind_indices = IndexVec::from_elem_n(unwind_target, 1);
-            for (drop_idx, drop_data) in drops.drops.iter_enumerated().skip(1) {
-                match drop_data.0.kind {
-                    DropKind::Storage => {
-                        if self.generator_kind.is_some() {
-                            let unwind_drop = self
-                                .scopes
-                                .unwind_drops
-                                .add_drop(drop_data.0, unwind_indices[drop_data.1]);
-                            unwind_indices.push(unwind_drop);
-                        } else {
-                            unwind_indices.push(unwind_indices[drop_data.1]);
-                        }
-                    }
-                    DropKind::Value => {
-                        let unwind_drop = self
-                            .scopes
-                            .unwind_drops
-                            .add_drop(drop_data.0, unwind_indices[drop_data.1]);
-                        self.scopes
-                            .unwind_drops
-                            .add_entry(blocks[drop_idx].unwrap(), unwind_indices[drop_data.1]);
-                        unwind_indices.push(unwind_drop);
-                    }
-                }
+fn get_unwind_to(
+    scope: &Scope,
+    generator_kind: Option<GeneratorKind>,
+    unwind_from: usize,
+    generator_drop: bool,
+) -> Option<BasicBlock> {
+    for drop_idx in (0..unwind_from).rev() {
+        let drop_data = &scope.drops[drop_idx];
+        match (generator_kind, &drop_data.kind) {
+            (Some(_), DropKind::Storage) => {
+                return Some(drop_data.cached_block.get(generator_drop).unwrap_or_else(|| {
+                    span_bug!(drop_data.span, "cached block not present for {:?}", drop_data)
+                }));
             }
-        }
-        blocks[ROOT_NODE].map(BasicBlock::unit)
-    }
-
-    /// Build the unwind and generator drop trees.
-    crate fn build_drop_trees(&mut self, should_abort: bool) {
-        if self.generator_kind.is_some() {
-            self.build_generator_drop_trees(should_abort);
-        } else {
-            Self::build_unwind_tree(
-                &mut self.cfg,
-                &mut self.scopes.unwind_drops,
-                self.fn_span,
-                should_abort,
-                &mut None,
-            );
-        }
-    }
-
-    fn build_generator_drop_trees(&mut self, should_abort: bool) {
-        // Build the drop tree for dropping the generator while it's suspended.
-        let drops = &mut self.scopes.generator_drops;
-        let cfg = &mut self.cfg;
-        let fn_span = self.fn_span;
-        let mut blocks = IndexVec::from_elem(None, &drops.drops);
-        drops.build_mir::<GeneratorDrop>(cfg, &mut blocks);
-        if let Some(root_block) = blocks[ROOT_NODE] {
-            cfg.terminate(
-                root_block,
-                SourceInfo::outermost(fn_span),
-                TerminatorKind::GeneratorDrop,
-            );
-        }
-
-        // Build the drop tree for unwinding in the normal control flow paths.
-        let resume_block = &mut None;
-        let unwind_drops = &mut self.scopes.unwind_drops;
-        Self::build_unwind_tree(cfg, unwind_drops, fn_span, should_abort, resume_block);
-
-        // Build the drop tree for unwinding when dropping a suspended
-        // generator.
-        //
-        // This is a different tree to the standard unwind paths here to
-        // prevent drop elaboration from creating drop flags that would have
-        // to be captured by the generator. I'm not sure how important this
-        // optimization is, but it is here.
-        for (drop_idx, drop_data) in drops.drops.iter_enumerated() {
-            if let DropKind::Value = drop_data.0.kind {
-                debug_assert!(drop_data.1 < drops.drops.next_index());
-                drops.entry_points.push((drop_data.1, blocks[drop_idx].unwrap()));
+            (None, DropKind::Value) => {
+                return Some(drop_data.cached_block.get(generator_drop).unwrap_or_else(|| {
+                    span_bug!(drop_data.span, "cached block not present for {:?}", drop_data)
+                }));
             }
-        }
-        Self::build_unwind_tree(cfg, drops, fn_span, should_abort, resume_block);
-    }
-
-    fn build_unwind_tree(
-        cfg: &mut CFG<'tcx>,
-        drops: &mut DropTree,
-        fn_span: Span,
-        should_abort: bool,
-        resume_block: &mut Option<BasicBlock>,
-    ) {
-        let mut blocks = IndexVec::from_elem(None, &drops.drops);
-        blocks[ROOT_NODE] = *resume_block;
-        drops.build_mir::<Unwind>(cfg, &mut blocks);
-        if let (None, Some(resume)) = (*resume_block, blocks[ROOT_NODE]) {
-            // `TerminatorKind::Abort` is used for `#[unwind(aborts)]`
-            // functions.
-            let terminator =
-                if should_abort { TerminatorKind::Abort } else { TerminatorKind::Resume };
-
-            cfg.terminate(resume, SourceInfo::outermost(fn_span), terminator);
-
-            *resume_block = blocks[ROOT_NODE];
+            _ => (),
         }
     }
+    None
 }
 
-// DropTreeBuilder implementations.
-
-struct ExitScopes;
-
-impl<'tcx> DropTreeBuilder<'tcx> for ExitScopes {
-    fn make_block(cfg: &mut CFG<'tcx>) -> BasicBlock {
-        cfg.start_new_block()
-    }
-    fn add_entry(cfg: &mut CFG<'tcx>, from: BasicBlock, to: BasicBlock) {
-        cfg.block_data_mut(from).terminator_mut().kind = TerminatorKind::Goto { target: to };
+fn build_diverge_scope<'tcx>(
+    cfg: &mut CFG<'tcx>,
+    span: Span,
+    scope: &mut Scope,
+    mut target: BasicBlock,
+    generator_drop: bool,
+    generator_kind: Option<GeneratorKind>,
+) -> BasicBlock {
+    // Build up the drops in **reverse** order. The end result will
+    // look like:
+    //
+    //    [drops[n]] -...-> [drops[0]] -> [target]
+    //
+    // The code in this function reads from right to left. At each
+    // point, we check for cached blocks representing the
+    // remainder. If everything is cached, we'll just walk right to
+    // left reading the cached results but never create anything.
+
+    let source_scope = scope.source_scope;
+    let source_info = |span| SourceInfo { span, scope: source_scope };
+
+    // We keep track of StorageDead statements to prepend to our current block
+    // and store them here, in reverse order.
+    let mut storage_deads = vec![];
+
+    let mut target_built_by_us = false;
+
+    // Build up the drops. Here we iterate the vector in
+    // *forward* order, so that we generate drops[0] first (right to
+    // left in diagram above).
+    debug!("build_diverge_scope({:?})", scope.drops);
+    for (j, drop_data) in scope.drops.iter_mut().enumerate() {
+        debug!("build_diverge_scope drop_data[{}]: {:?}", j, drop_data);
+        // Only full value drops are emitted in the diverging path,
+        // not StorageDead, except in the case of generators.
+        //
+        // Note: This may not actually be what we desire (are we
+        // "freeing" stack storage as we unwind, or merely observing a
+        // frozen stack)? In particular, the intent may have been to
+        // match the behavior of clang, but on inspection eddyb says
+        // this is not what clang does.
+        match drop_data.kind {
+            DropKind::Storage if generator_kind.is_some() => {
+                storage_deads.push(Statement {
+                    source_info: source_info(drop_data.span),
+                    kind: StatementKind::StorageDead(drop_data.local),
+                });
+                if !target_built_by_us {
+                    // We cannot add statements to an existing block, so we create a new
+                    // block for our StorageDead statements.
+                    let block = cfg.start_new_cleanup_block();
+                    let source_info = SourceInfo { span: DUMMY_SP, scope: source_scope };
+                    cfg.goto(block, source_info, target);
+                    target = block;
+                    target_built_by_us = true;
+                }
+                *drop_data.cached_block.ref_mut(generator_drop) = Some(target);
+            }
+            DropKind::Storage => {}
+            DropKind::Value => {
+                let cached_block = drop_data.cached_block.ref_mut(generator_drop);
+                target = if let Some(cached_block) = *cached_block {
+                    storage_deads.clear();
+                    target_built_by_us = false;
+                    cached_block
+                } else {
+                    push_storage_deads(cfg, target, &mut storage_deads);
+                    let block = cfg.start_new_cleanup_block();
+                    cfg.terminate(
+                        block,
+                        source_info(drop_data.span),
+                        TerminatorKind::Drop {
+                            location: drop_data.local.into(),
+                            target,
+                            unwind: None,
+                        },
+                    );
+                    *cached_block = Some(block);
+                    target_built_by_us = true;
+                    block
+                };
+            }
+        };
     }
-}
+    push_storage_deads(cfg, target, &mut storage_deads);
+    *scope.cached_unwind.ref_mut(generator_drop) = Some(target);
 
-struct GeneratorDrop;
+    assert!(storage_deads.is_empty());
+    debug!("build_diverge_scope({:?}, {:?}) = {:?}", scope, span, target);
 
-impl<'tcx> DropTreeBuilder<'tcx> for GeneratorDrop {
-    fn make_block(cfg: &mut CFG<'tcx>) -> BasicBlock {
-        cfg.start_new_block()
-    }
-    fn add_entry(cfg: &mut CFG<'tcx>, from: BasicBlock, to: BasicBlock) {
-        let term = cfg.block_data_mut(from).terminator_mut();
-        if let TerminatorKind::Yield { ref mut drop, .. } = term.kind {
-            *drop = Some(to);
-        } else {
-            span_bug!(
-                term.source_info.span,
-                "cannot enter generator drop tree from {:?}",
-                term.kind
-            )
-        }
-    }
+    target
 }
 
-struct Unwind;
-
-impl<'tcx> DropTreeBuilder<'tcx> for Unwind {
-    fn make_block(cfg: &mut CFG<'tcx>) -> BasicBlock {
-        cfg.start_new_cleanup_block()
-    }
-    fn add_entry(cfg: &mut CFG<'tcx>, from: BasicBlock, to: BasicBlock) {
-        let term = &mut cfg.block_data_mut(from).terminator_mut();
-        match &mut term.kind {
-            TerminatorKind::Drop { unwind, .. }
-            | TerminatorKind::DropAndReplace { unwind, .. }
-            | TerminatorKind::FalseUnwind { unwind, .. }
-            | TerminatorKind::Call { cleanup: unwind, .. }
-            | TerminatorKind::Assert { cleanup: unwind, .. } => {
-                *unwind = Some(to);
-            }
-            TerminatorKind::Goto { .. }
-            | TerminatorKind::SwitchInt { .. }
-            | TerminatorKind::Resume
-            | TerminatorKind::Abort
-            | TerminatorKind::Return
-            | TerminatorKind::Unreachable
-            | TerminatorKind::Yield { .. }
-            | TerminatorKind::GeneratorDrop
-            | TerminatorKind::FalseEdges { .. }
-            | TerminatorKind::InlineAsm { .. } => {
-                span_bug!(term.source_info.span, "cannot unwind from {:?}", term.kind)
-            }
-        }
+fn push_storage_deads<'tcx>(
+    cfg: &mut CFG<'tcx>,
+    target: BasicBlock,
+    storage_deads: &mut Vec<Statement<'tcx>>,
+) {
+    if storage_deads.is_empty() {
+        return;
     }
+    let statements = &mut cfg.block_data_mut(target).statements;
+    storage_deads.reverse();
+    debug!(
+        "push_storage_deads({:?}), storage_deads={:?}, statements={:?}",
+        target, storage_deads, statements
+    );
+    storage_deads.append(statements);
+    mem::swap(statements, storage_deads);
+    assert!(storage_deads.is_empty());
 }
diff --git a/src/test/codegen/drop.rs b/src/test/codegen/drop.rs
index 99a791464ab..0c7f3bb2020 100644
--- a/src/test/codegen/drop.rs
+++ b/src/test/codegen/drop.rs
@@ -23,13 +23,13 @@ pub fn droppy() {
 // FIXME(eddyb) the `void @` forces a match on the instruction, instead of the
 // comment, that's `; call core::intrinsics::drop_in_place::<drop::SomeUniqueName>`
 // for the `v0` mangling, should switch to matching on that once `legacy` is gone.
-// CHECK-NOT: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
-// CHECK: invoke void @{{.*}}drop_in_place{{.*}}SomeUniqueName
-// CHECK: invoke void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK-NOT: invoke void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
+// CHECK-NOT: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
+// CHECK: invoke void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
+// CHECK: invoke void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK: call void @{{.*}}drop_in_place{{.*}}SomeUniqueName
 // CHECK-NOT: {{(call|invoke) void @.*}}drop_in_place{{.*}}SomeUniqueName
 // The next line checks for the } that ends the function definition
diff --git a/src/test/mir-opt/basic_assignment/rustc.main.SimplifyCfg-initial.after.mir b/src/test/mir-opt/basic_assignment/rustc.main.SimplifyCfg-initial.after.mir
index c0a29233271..de423cd907a 100644
--- a/src/test/mir-opt/basic_assignment/rustc.main.SimplifyCfg-initial.after.mir
+++ b/src/test/mir-opt/basic_assignment/rustc.main.SimplifyCfg-initial.after.mir
@@ -47,14 +47,30 @@ fn main() -> () {
         StorageLive(_5);                 // scope 3 at $DIR/basic_assignment.rs:19:9: 19:15
         StorageLive(_6);                 // scope 4 at $DIR/basic_assignment.rs:23:14: 23:20
         _6 = move _4;                    // scope 4 at $DIR/basic_assignment.rs:23:14: 23:20
-        replace(_5 <- move _6) -> [return: bb1, unwind: bb5]; // scope 4 at $DIR/basic_assignment.rs:23:5: 23:11
+        replace(_5 <- move _6) -> [return: bb2, unwind: bb5]; // scope 4 at $DIR/basic_assignment.rs:23:5: 23:11
     }
 
-    bb1: {
-        drop(_6) -> [return: bb2, unwind: bb6]; // scope 4 at $DIR/basic_assignment.rs:23:19: 23:20
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/basic_assignment.rs:10:1: 24:2
     }
 
     bb2: {
+        drop(_6) -> [return: bb6, unwind: bb4]; // scope 4 at $DIR/basic_assignment.rs:23:19: 23:20
+    }
+
+    bb3 (cleanup): {
+        drop(_4) -> bb1;                 // scope 2 at $DIR/basic_assignment.rs:24:1: 24:2
+    }
+
+    bb4 (cleanup): {
+        drop(_5) -> bb3;                 // scope 3 at $DIR/basic_assignment.rs:24:1: 24:2
+    }
+
+    bb5 (cleanup): {
+        drop(_6) -> bb4;                 // scope 4 at $DIR/basic_assignment.rs:23:19: 23:20
+    }
+
+    bb6: {
         StorageDead(_6);                 // scope 4 at $DIR/basic_assignment.rs:23:19: 23:20
         _0 = const ();                   // scope 0 at $DIR/basic_assignment.rs:10:11: 24:2
                                          // ty::Const
@@ -63,34 +79,18 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/basic_assignment.rs:10:11: 24:2
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        drop(_5) -> [return: bb3, unwind: bb7]; // scope 3 at $DIR/basic_assignment.rs:24:1: 24:2
+        drop(_5) -> [return: bb7, unwind: bb3]; // scope 3 at $DIR/basic_assignment.rs:24:1: 24:2
     }
 
-    bb3: {
+    bb7: {
         StorageDead(_5);                 // scope 3 at $DIR/basic_assignment.rs:24:1: 24:2
-        drop(_4) -> [return: bb4, unwind: bb8]; // scope 2 at $DIR/basic_assignment.rs:24:1: 24:2
+        drop(_4) -> [return: bb8, unwind: bb1]; // scope 2 at $DIR/basic_assignment.rs:24:1: 24:2
     }
 
-    bb4: {
+    bb8: {
         StorageDead(_4);                 // scope 2 at $DIR/basic_assignment.rs:24:1: 24:2
         StorageDead(_2);                 // scope 1 at $DIR/basic_assignment.rs:24:1: 24:2
         StorageDead(_1);                 // scope 0 at $DIR/basic_assignment.rs:24:1: 24:2
         return;                          // scope 0 at $DIR/basic_assignment.rs:24:2: 24:2
     }
-
-    bb5 (cleanup): {
-        drop(_6) -> bb6;                 // scope 4 at $DIR/basic_assignment.rs:23:19: 23:20
-    }
-
-    bb6 (cleanup): {
-        drop(_5) -> bb7;                 // scope 3 at $DIR/basic_assignment.rs:24:1: 24:2
-    }
-
-    bb7 (cleanup): {
-        drop(_4) -> bb8;                 // scope 2 at $DIR/basic_assignment.rs:24:1: 24:2
-    }
-
-    bb8 (cleanup): {
-        resume;                          // scope 0 at $DIR/basic_assignment.rs:10:1: 24:2
-    }
 }
diff --git a/src/test/mir-opt/box_expr/rustc.main.ElaborateDrops.before.mir b/src/test/mir-opt/box_expr/rustc.main.ElaborateDrops.before.mir
index 9d5b9be363d..259501c7de9 100644
--- a/src/test/mir-opt/box_expr/rustc.main.ElaborateDrops.before.mir
+++ b/src/test/mir-opt/box_expr/rustc.main.ElaborateDrops.before.mir
@@ -14,7 +14,7 @@ fn main() -> () {
         StorageLive(_1);                 // scope 0 at $DIR/box_expr.rs:7:9: 7:10
         StorageLive(_2);                 // scope 0 at $DIR/box_expr.rs:7:13: 7:25
         _2 = Box(S);                     // scope 0 at $DIR/box_expr.rs:7:13: 7:25
-        (*_2) = const S::new() -> [return: bb1, unwind: bb7]; // scope 0 at $DIR/box_expr.rs:7:17: 7:25
+        (*_2) = const S::new() -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/box_expr.rs:7:17: 7:25
                                          // ty::Const
                                          // + ty: fn() -> S {S::new}
                                          // + val: Value(Scalar(<ZST>))
@@ -23,17 +23,25 @@ fn main() -> () {
                                          // + literal: Const { ty: fn() -> S {S::new}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
-        _1 = move _2;                    // scope 0 at $DIR/box_expr.rs:7:13: 7:25
-        drop(_2) -> bb2;                 // scope 0 at $DIR/box_expr.rs:7:24: 7:25
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/box_expr.rs:6:1: 9:2
     }
 
     bb2: {
+        _1 = move _2;                    // scope 0 at $DIR/box_expr.rs:7:13: 7:25
+        drop(_2) -> bb4;                 // scope 0 at $DIR/box_expr.rs:7:24: 7:25
+    }
+
+    bb3 (cleanup): {
+        drop(_2) -> bb1;                 // scope 0 at $DIR/box_expr.rs:7:24: 7:25
+    }
+
+    bb4: {
         StorageDead(_2);                 // scope 0 at $DIR/box_expr.rs:7:24: 7:25
         StorageLive(_3);                 // scope 1 at $DIR/box_expr.rs:8:5: 8:12
         StorageLive(_4);                 // scope 1 at $DIR/box_expr.rs:8:10: 8:11
         _4 = move _1;                    // scope 1 at $DIR/box_expr.rs:8:10: 8:11
-        _3 = const std::mem::drop::<std::boxed::Box<S>>(move _4) -> [return: bb3, unwind: bb5]; // scope 1 at $DIR/box_expr.rs:8:5: 8:12
+        _3 = const std::mem::drop::<std::boxed::Box<S>>(move _4) -> [return: bb5, unwind: bb7]; // scope 1 at $DIR/box_expr.rs:8:5: 8:12
                                          // ty::Const
                                          // + ty: fn(std::boxed::Box<S>) {std::mem::drop::<std::boxed::Box<S>>}
                                          // + val: Value(Scalar(<ZST>))
@@ -42,7 +50,7 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(std::boxed::Box<S>) {std::mem::drop::<std::boxed::Box<S>>}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb3: {
+    bb5: {
         StorageDead(_4);                 // scope 1 at $DIR/box_expr.rs:8:11: 8:12
         StorageDead(_3);                 // scope 1 at $DIR/box_expr.rs:8:12: 8:13
         _0 = const ();                   // scope 0 at $DIR/box_expr.rs:6:11: 9:2
@@ -52,27 +60,19 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/box_expr.rs:6:11: 9:2
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        drop(_1) -> bb4;                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
-    }
-
-    bb4: {
-        StorageDead(_1);                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
-        return;                          // scope 0 at $DIR/box_expr.rs:9:2: 9:2
-    }
-
-    bb5 (cleanup): {
-        drop(_4) -> bb6;                 // scope 1 at $DIR/box_expr.rs:8:11: 8:12
+        drop(_1) -> bb8;                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
     }
 
     bb6 (cleanup): {
-        drop(_1) -> bb8;                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
+        drop(_1) -> bb1;                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
     }
 
     bb7 (cleanup): {
-        drop(_2) -> bb8;                 // scope 0 at $DIR/box_expr.rs:7:24: 7:25
+        drop(_4) -> bb6;                 // scope 1 at $DIR/box_expr.rs:8:11: 8:12
     }
 
-    bb8 (cleanup): {
-        resume;                          // scope 0 at $DIR/box_expr.rs:6:1: 9:2
+    bb8: {
+        StorageDead(_1);                 // scope 0 at $DIR/box_expr.rs:9:1: 9:2
+        return;                          // scope 0 at $DIR/box_expr.rs:9:2: 9:2
     }
 }
diff --git a/src/test/mir-opt/const-promotion-extern-static/rustc.BAR.PromoteTemps.diff b/src/test/mir-opt/const-promotion-extern-static/rustc.BAR.PromoteTemps.diff
index 8eb8d4c667b..5c192979a86 100644
--- a/src/test/mir-opt/const-promotion-extern-static/rustc.BAR.PromoteTemps.diff
+++ b/src/test/mir-opt/const-promotion-extern-static/rustc.BAR.PromoteTemps.diff
@@ -33,7 +33,7 @@
 +                                          // + literal: Const { ty: &[&i32; 1], val: Unevaluated(DefId(0:6 ~ const_promotion_extern_static[317d]::BAR[0]), [], Some(promoted[0])) }
 +         _2 = &(*_6);                     // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:35
           _1 = move _2 as &[&i32] (Pointer(Unsize)); // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:35
-          _0 = const core::slice::<impl [&i32]>::as_ptr(move _1) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:44
+          _0 = const core::slice::<impl [&i32]>::as_ptr(move _1) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:44
                                            // ty::Const
                                            // + ty: for<'r> fn(&'r [&i32]) -> *const &i32 {core::slice::<impl [&i32]>::as_ptr}
                                            // + val: Value(Scalar(<ZST>))
@@ -42,15 +42,15 @@
                                            // + literal: Const { ty: for<'r> fn(&'r [&i32]) -> *const &i32 {core::slice::<impl [&i32]>::as_ptr}, val: Value(Scalar(<ZST>)) }
       }
   
-      bb1: {
+      bb1 (cleanup): {
+          resume;                          // scope 0 at $DIR/const-promotion-extern-static.rs:9:1: 9:45
+      }
+  
+      bb2: {
 -         StorageDead(_5);                 // scope 0 at $DIR/const-promotion-extern-static.rs:9:43: 9:44
 -         StorageDead(_3);                 // scope 0 at $DIR/const-promotion-extern-static.rs:9:43: 9:44
           return;                          // scope 0 at $DIR/const-promotion-extern-static.rs:9:1: 9:45
       }
-  
-      bb2 (cleanup): {
-          resume;                          // scope 0 at $DIR/const-promotion-extern-static.rs:9:1: 9:45
-      }
 - }
 - 
 - alloc0 (static: Y, size: 4, align: 4) {
diff --git a/src/test/mir-opt/const-promotion-extern-static/rustc.FOO.PromoteTemps.diff b/src/test/mir-opt/const-promotion-extern-static/rustc.FOO.PromoteTemps.diff
index 781aa3c5500..649cea6493e 100644
--- a/src/test/mir-opt/const-promotion-extern-static/rustc.FOO.PromoteTemps.diff
+++ b/src/test/mir-opt/const-promotion-extern-static/rustc.FOO.PromoteTemps.diff
@@ -35,7 +35,7 @@
 +                                          // + literal: Const { ty: &[&i32; 1], val: Unevaluated(DefId(0:7 ~ const_promotion_extern_static[317d]::FOO[0]), [], Some(promoted[0])) }
 +         _2 = &(*_6);                     // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:46
           _1 = move _2 as &[&i32] (Pointer(Unsize)); // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:46
-          _0 = const core::slice::<impl [&i32]>::as_ptr(move _1) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:55
+          _0 = const core::slice::<impl [&i32]>::as_ptr(move _1) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:55
                                            // ty::Const
                                            // + ty: for<'r> fn(&'r [&i32]) -> *const &i32 {core::slice::<impl [&i32]>::as_ptr}
                                            // + val: Value(Scalar(<ZST>))
@@ -44,15 +44,15 @@
                                            // + literal: Const { ty: for<'r> fn(&'r [&i32]) -> *const &i32 {core::slice::<impl [&i32]>::as_ptr}, val: Value(Scalar(<ZST>)) }
       }
   
-      bb1: {
+      bb1 (cleanup): {
+          resume;                          // scope 0 at $DIR/const-promotion-extern-static.rs:13:1: 13:56
+      }
+  
+      bb2: {
 -         StorageDead(_5);                 // scope 0 at $DIR/const-promotion-extern-static.rs:13:54: 13:55
 -         StorageDead(_3);                 // scope 0 at $DIR/const-promotion-extern-static.rs:13:54: 13:55
           return;                          // scope 0 at $DIR/const-promotion-extern-static.rs:13:1: 13:56
       }
-  
-      bb2 (cleanup): {
-          resume;                          // scope 0 at $DIR/const-promotion-extern-static.rs:13:1: 13:56
-      }
   }
 - 
 - alloc2 (extern static: X)
diff --git a/src/test/mir-opt/const_prop/boxes/rustc.main.ConstProp.diff b/src/test/mir-opt/const_prop/boxes/rustc.main.ConstProp.diff
index c9b082ea6e3..16f937f3e7b 100644
--- a/src/test/mir-opt/const_prop/boxes/rustc.main.ConstProp.diff
+++ b/src/test/mir-opt/const_prop/boxes/rustc.main.ConstProp.diff
@@ -35,10 +35,14 @@
                                            // + span: $DIR/boxes.rs:12:25: 12:26
                                            // + literal: Const { ty: i32, val: Value(Scalar(0x00000000)) }
           StorageDead(_2);                 // scope 0 at $DIR/boxes.rs:12:25: 12:26
-          drop(_3) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/boxes.rs:12:26: 12:27
+          drop(_3) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/boxes.rs:12:26: 12:27
       }
   
-      bb1: {
+      bb1 (cleanup): {
+          resume;                          // scope 0 at $DIR/boxes.rs:11:1: 13:2
+      }
+  
+      bb2: {
           StorageDead(_3);                 // scope 0 at $DIR/boxes.rs:12:26: 12:27
           _0 = const ();                   // scope 0 at $DIR/boxes.rs:11:11: 13:2
                                            // ty::Const
@@ -50,9 +54,5 @@
           StorageDead(_1);                 // scope 0 at $DIR/boxes.rs:13:1: 13:2
           return;                          // scope 0 at $DIR/boxes.rs:13:2: 13:2
       }
-  
-      bb2 (cleanup): {
-          resume;                          // scope 0 at $DIR/boxes.rs:11:1: 13:2
-      }
   }
   
diff --git a/src/test/mir-opt/generator-drop-cleanup/rustc.main-{{closure}}.generator_drop.0.mir b/src/test/mir-opt/generator-drop-cleanup/rustc.main-{{closure}}.generator_drop.0.mir
index 6a32a42d85a..3e7083ff62e 100644
--- a/src/test/mir-opt/generator-drop-cleanup/rustc.main-{{closure}}.generator_drop.0.mir
+++ b/src/test/mir-opt/generator-drop-cleanup/rustc.main-{{closure}}.generator_drop.0.mir
@@ -21,31 +21,31 @@ fn main::{{closure}}#0(_1: *mut [generator@$DIR/generator-drop-cleanup.rs:10:15:
 
     bb0: {
         _9 = discriminant((*_1));        // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
-        switchInt(move _9) -> [0u32: bb7, 3u32: bb10, otherwise: bb11]; // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+        switchInt(move _9) -> [0u32: bb7, 3u32: bb11, otherwise: bb12]; // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 
-    bb1: {
-        StorageDead(_5);                 // scope 1 at $DIR/generator-drop-cleanup.rs:12:13: 12:14
-        StorageDead(_4);                 // scope 1 at $DIR/generator-drop-cleanup.rs:12:14: 12:15
-        drop((((*_1) as variant#3).0: std::string::String)) -> [return: bb2, unwind: bb5]; // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 
-    bb2: {
+    bb2 (cleanup): {
         nop;                             // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
         goto -> bb8;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
     }
 
     bb3: {
-        return;                          // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+        StorageDead(_5);                 // scope 1 at $DIR/generator-drop-cleanup.rs:12:13: 12:14
+        StorageDead(_4);                 // scope 1 at $DIR/generator-drop-cleanup.rs:12:14: 12:15
+        drop((((*_1) as variant#3).0: std::string::String)) -> [return: bb4, unwind: bb2]; // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
     }
 
-    bb4 (cleanup): {
-        resume;                          // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+    bb4: {
+        nop;                             // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
+        goto -> bb9;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
     }
 
-    bb5 (cleanup): {
-        nop;                             // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
-        goto -> bb4;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
+    bb5: {
+        return;                          // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 
     bb6: {
@@ -53,24 +53,28 @@ fn main::{{closure}}#0(_1: *mut [generator@$DIR/generator-drop-cleanup.rs:10:15:
     }
 
     bb7: {
-        goto -> bb9;                     // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+        goto -> bb10;                    // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 
-    bb8: {
-        goto -> bb3;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
+    bb8 (cleanup): {
+        goto -> bb1;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
     }
 
     bb9: {
-        goto -> bb6;                     // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+        goto -> bb5;                     // scope 0 at $DIR/generator-drop-cleanup.rs:13:5: 13:6
     }
 
     bb10: {
+        goto -> bb6;                     // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+    }
+
+    bb11: {
         StorageLive(_4);                 // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
         StorageLive(_5);                 // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
-        goto -> bb1;                     // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
+        goto -> bb3;                     // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 
-    bb11: {
+    bb12: {
         return;                          // scope 0 at $DIR/generator-drop-cleanup.rs:10:15: 13:6
     }
 }
diff --git a/src/test/mir-opt/generator-storage-dead-unwind/rustc.main-{{closure}}.StateTransform.before.mir b/src/test/mir-opt/generator-storage-dead-unwind/rustc.main-{{closure}}.StateTransform.before.mir
index e9e977a611b..06645860d84 100644
--- a/src/test/mir-opt/generator-storage-dead-unwind/rustc.main-{{closure}}.StateTransform.before.mir
+++ b/src/test/mir-opt/generator-storage-dead-unwind/rustc.main-{{closure}}.StateTransform.before.mir
@@ -39,16 +39,20 @@ yields ()
         StorageLive(_5);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:9: 25:14
         StorageLive(_6);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:9: 25:14
         _6 = ();                         // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:9: 25:14
-        _5 = yield(move _6) -> [resume: bb1, drop: bb5]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:9: 25:14
+        _5 = yield(move _6) -> [resume: bb2, drop: bb4]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:9: 25:14
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/generator-storage-dead-unwind.rs:22:16: 28:6
+    }
+
+    bb2: {
         StorageDead(_6);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:13: 25:14
         StorageDead(_5);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:14: 25:15
         StorageLive(_7);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:9: 26:16
         StorageLive(_8);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:14: 26:15
         _8 = move _3;                    // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:14: 26:15
-        _7 = const take::<Foo>(move _8) -> [return: bb2, unwind: bb9]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:9: 26:16
+        _7 = const take::<Foo>(move _8) -> [return: bb7, unwind: bb9]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:9: 26:16
                                          // ty::Const
                                          // + ty: fn(Foo) {take::<Foo>}
                                          // + val: Value(Scalar(<ZST>))
@@ -57,80 +61,76 @@ yields ()
                                          // + literal: Const { ty: fn(Foo) {take::<Foo>}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb2: {
-        StorageDead(_8);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:15: 26:16
-        StorageDead(_7);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:16: 26:17
-        StorageLive(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:9: 27:16
-        StorageLive(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:14: 27:15
-        _10 = move _4;                   // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:14: 27:15
-        _9 = const take::<Bar>(move _10) -> [return: bb3, unwind: bb8]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:9: 27:16
-                                         // ty::Const
-                                         // + ty: fn(Bar) {take::<Bar>}
-                                         // + val: Value(Scalar(<ZST>))
-                                         // mir::Constant
-                                         // + span: $DIR/generator-storage-dead-unwind.rs:27:9: 27:13
-                                         // + literal: Const { ty: fn(Bar) {take::<Bar>}, val: Value(Scalar(<ZST>)) }
-    }
-
-    bb3: {
-        StorageDead(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:15: 27:16
-        StorageDead(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:16: 27:17
-        _0 = const ();                   // scope 0 at $DIR/generator-storage-dead-unwind.rs:22:19: 28:6
-                                         // ty::Const
-                                         // + ty: ()
-                                         // + val: Value(Scalar(<ZST>))
-                                         // mir::Constant
-                                         // + span: $DIR/generator-storage-dead-unwind.rs:22:19: 28:6
-                                         // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        StorageDead(_4);                 // scope 1 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+    bb3 (cleanup): {
         StorageDead(_3);                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
-        drop(_1) -> [return: bb4, unwind: bb11]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        drop(_1) -> bb1;                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
     }
 
     bb4: {
-        return;                          // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:6: 28:6
-    }
-
-    bb5: {
         StorageDead(_6);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:13: 25:14
         StorageDead(_5);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:25:14: 25:15
         StorageDead(_4);                 // scope 1 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
-        drop(_3) -> [return: bb6, unwind: bb12]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        drop(_3) -> [return: bb5, unwind: bb3]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
     }
 
-    bb6: {
+    bb5: {
         StorageDead(_3);                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
-        drop(_1) -> [return: bb7, unwind: bb11]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        drop(_1) -> [return: bb6, unwind: bb1]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
     }
 
-    bb7: {
+    bb6: {
         generator_drop;                  // scope 0 at $DIR/generator-storage-dead-unwind.rs:22:16: 28:6
     }
 
+    bb7: {
+        StorageDead(_8);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:15: 26:16
+        StorageDead(_7);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:16: 26:17
+        StorageLive(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:9: 27:16
+        StorageLive(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:14: 27:15
+        _10 = move _4;                   // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:14: 27:15
+        _9 = const take::<Bar>(move _10) -> [return: bb10, unwind: bb11]; // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:9: 27:16
+                                         // ty::Const
+                                         // + ty: fn(Bar) {take::<Bar>}
+                                         // + val: Value(Scalar(<ZST>))
+                                         // mir::Constant
+                                         // + span: $DIR/generator-storage-dead-unwind.rs:27:9: 27:13
+                                         // + literal: Const { ty: fn(Bar) {take::<Bar>}, val: Value(Scalar(<ZST>)) }
+    }
+
     bb8 (cleanup): {
-        StorageDead(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:15: 27:16
-        StorageDead(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:16: 27:17
-        goto -> bb10;                    // scope 2 at $DIR/generator-storage-dead-unwind.rs:1:1: 1:1
+        StorageDead(_4);                 // scope 1 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        StorageDead(_3);                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        drop(_1) -> bb1;                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
     }
 
     bb9 (cleanup): {
         StorageDead(_8);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:15: 26:16
         StorageDead(_7);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:26:16: 26:17
-        goto -> bb10;                    // scope 2 at $DIR/generator-storage-dead-unwind.rs:1:1: 1:1
+        goto -> bb8;                     // scope 2 at $DIR/generator-storage-dead-unwind.rs:1:1: 1:1
     }
 
-    bb10 (cleanup): {
+    bb10: {
+        StorageDead(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:15: 27:16
+        StorageDead(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:16: 27:17
+        _0 = const ();                   // scope 0 at $DIR/generator-storage-dead-unwind.rs:22:19: 28:6
+                                         // ty::Const
+                                         // + ty: ()
+                                         // + val: Value(Scalar(<ZST>))
+                                         // mir::Constant
+                                         // + span: $DIR/generator-storage-dead-unwind.rs:22:19: 28:6
+                                         // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
         StorageDead(_4);                 // scope 1 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
         StorageDead(_3);                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
-        drop(_1) -> bb11;                // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+        drop(_1) -> [return: bb12, unwind: bb1]; // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
     }
 
     bb11 (cleanup): {
-        resume;                          // scope 0 at $DIR/generator-storage-dead-unwind.rs:22:16: 28:6
+        StorageDead(_10);                // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:15: 27:16
+        StorageDead(_9);                 // scope 2 at $DIR/generator-storage-dead-unwind.rs:27:16: 27:17
+        goto -> bb8;                     // scope 2 at $DIR/generator-storage-dead-unwind.rs:1:1: 1:1
     }
 
-    bb12 (cleanup): {
-        StorageDead(_3);                 // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
-        drop(_1) -> bb11;                // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:5: 28:6
+    bb12: {
+        return;                          // scope 0 at $DIR/generator-storage-dead-unwind.rs:28:6: 28:6
     }
 }
diff --git a/src/test/mir-opt/graphviz/rustc.main.mir_map.0.dot b/src/test/mir-opt/graphviz/rustc.main.mir_map.0.dot
index 1a66b53c69b..f5d8b84812a 100644
--- a/src/test/mir-opt/graphviz/rustc.main.mir_map.0.dot
+++ b/src/test/mir-opt/graphviz/rustc.main.mir_map.0.dot
@@ -3,5 +3,8 @@ digraph Mir_0_3 {
     node [fontname="monospace"];
     edge [fontname="monospace"];
     label=<fn main() -&gt; ()<br align="left"/>>;
-    bb0__0_3 [shape="none", label=<<table border="0" cellborder="1" cellspacing="0"><tr><td bgcolor="gray" align="center" colspan="1">0</td></tr><tr><td align="left" balign="left">_0 = const ()<br/></td></tr><tr><td align="left">return</td></tr></table>>];
+    bb0__0_3 [shape="none", label=<<table border="0" cellborder="1" cellspacing="0"><tr><td bgcolor="gray" align="center" colspan="1">0</td></tr><tr><td align="left" balign="left">_0 = const ()<br/></td></tr><tr><td align="left">goto</td></tr></table>>];
+    bb1__0_3 [shape="none", label=<<table border="0" cellborder="1" cellspacing="0"><tr><td bgcolor="gray" align="center" colspan="1">1</td></tr><tr><td align="left">resume</td></tr></table>>];
+    bb2__0_3 [shape="none", label=<<table border="0" cellborder="1" cellspacing="0"><tr><td bgcolor="gray" align="center" colspan="1">2</td></tr><tr><td align="left">return</td></tr></table>>];
+    bb0__0_3 -> bb2__0_3 [label=""];
 }
diff --git a/src/test/mir-opt/inline/inline-into-box-place/32bit/rustc.main.Inline.diff b/src/test/mir-opt/inline/inline-into-box-place/32bit/rustc.main.Inline.diff
index f31d5fae9ed..50913de98b5 100644
--- a/src/test/mir-opt/inline/inline-into-box-place/32bit/rustc.main.Inline.diff
+++ b/src/test/mir-opt/inline/inline-into-box-place/32bit/rustc.main.Inline.diff
@@ -17,7 +17,7 @@
           StorageLive(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:8:9: 8:11
           StorageLive(_2);                 // scope 0 at $DIR/inline-into-box-place.rs:8:29: 8:43
           _2 = Box(std::vec::Vec<u32>);    // scope 0 at $DIR/inline-into-box-place.rs:8:29: 8:43
--         (*_2) = const std::vec::Vec::<u32>::new() -> [return: bb1, unwind: bb4]; // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
+-         (*_2) = const std::vec::Vec::<u32>::new() -> [return: bb2, unwind: bb4]; // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
 +         _4 = &mut (*_2);                 // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
 +         ((*_4).0: alloc::raw_vec::RawVec<u32>) = const alloc::raw_vec::RawVec::<u32> { ptr: std::ptr::Unique::<u32> { pointer: {0x4 as *const u32}, _marker: std::marker::PhantomData::<u32> }, cap: 0usize, alloc: std::alloc::Global }; // scope 2 at $SRC_DIR/liballoc/vec.rs:LL:COL
                                            // ty::Const
@@ -31,7 +31,11 @@
 -                                          // + literal: Const { ty: fn() -> std::vec::Vec<u32> {std::vec::Vec::<u32>::new}, val: Value(Scalar(<ZST>)) }
 -     }
 - 
--     bb1: {
+-     bb1 (cleanup): {
+-         resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
+-     }
+- 
+-     bb2: {
 +                                          // + span: $SRC_DIR/liballoc/vec.rs:LL:COL
 +                                          // + user_ty: UserType(0)
 +                                          // + literal: Const { ty: alloc::raw_vec::RawVec<u32>, val: Value(ByRef { alloc: Allocation { bytes: [4, 0, 0, 0, 0, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [255], len: Size { raw: 8 } }, size: Size { raw: 8 }, align: Align { pow2: 2 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
@@ -51,29 +55,28 @@
                                            // mir::Constant
                                            // + span: $DIR/inline-into-box-place.rs:7:11: 9:2
                                            // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
--         drop(_1) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
-+         drop(_1) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
+-         drop(_1) -> [return: bb3, unwind: bb1]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
++         drop(_1) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
       }
   
--     bb2: {
-+     bb1: {
-          StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
-          return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
+-     bb3: {
+-         StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
+-         return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
++     bb1 (cleanup): {
++         resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
       }
   
--     bb3 (cleanup): {
-+     bb2 (cleanup): {
-          resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
--     }
-- 
 -     bb4 (cleanup): {
--         _3 = const alloc::alloc::box_free::<std::vec::Vec<u32>>(move (_2.0: std::ptr::Unique<std::vec::Vec<u32>>)) -> bb3; // scope 0 at $DIR/inline-into-box-place.rs:8:42: 8:43
+-         _3 = const alloc::alloc::box_free::<std::vec::Vec<u32>>(move (_2.0: std::ptr::Unique<std::vec::Vec<u32>>)) -> bb1; // scope 0 at $DIR/inline-into-box-place.rs:8:42: 8:43
 -                                          // ty::Const
 -                                          // + ty: unsafe fn(std::ptr::Unique<std::vec::Vec<u32>>) {alloc::alloc::box_free::<std::vec::Vec<u32>>}
 -                                          // + val: Value(Scalar(<ZST>))
 -                                          // mir::Constant
 -                                          // + span: $DIR/inline-into-box-place.rs:8:42: 8:43
 -                                          // + literal: Const { ty: unsafe fn(std::ptr::Unique<std::vec::Vec<u32>>) {alloc::alloc::box_free::<std::vec::Vec<u32>>}, val: Value(Scalar(<ZST>)) }
++     bb2: {
++         StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
++         return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
       }
   }
   
diff --git a/src/test/mir-opt/inline/inline-into-box-place/64bit/rustc.main.Inline.diff b/src/test/mir-opt/inline/inline-into-box-place/64bit/rustc.main.Inline.diff
index 324ec2d7c5b..7a1b6460c5b 100644
--- a/src/test/mir-opt/inline/inline-into-box-place/64bit/rustc.main.Inline.diff
+++ b/src/test/mir-opt/inline/inline-into-box-place/64bit/rustc.main.Inline.diff
@@ -17,7 +17,7 @@
           StorageLive(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:8:9: 8:11
           StorageLive(_2);                 // scope 0 at $DIR/inline-into-box-place.rs:8:29: 8:43
           _2 = Box(std::vec::Vec<u32>);    // scope 0 at $DIR/inline-into-box-place.rs:8:29: 8:43
--         (*_2) = const std::vec::Vec::<u32>::new() -> [return: bb1, unwind: bb4]; // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
+-         (*_2) = const std::vec::Vec::<u32>::new() -> [return: bb2, unwind: bb4]; // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
 +         _4 = &mut (*_2);                 // scope 0 at $DIR/inline-into-box-place.rs:8:33: 8:43
 +         ((*_4).0: alloc::raw_vec::RawVec<u32>) = const alloc::raw_vec::RawVec::<u32> { ptr: std::ptr::Unique::<u32> { pointer: {0x4 as *const u32}, _marker: std::marker::PhantomData::<u32> }, cap: 0usize, alloc: std::alloc::Global }; // scope 2 at $SRC_DIR/liballoc/vec.rs:LL:COL
                                            // ty::Const
@@ -31,7 +31,11 @@
 -                                          // + literal: Const { ty: fn() -> std::vec::Vec<u32> {std::vec::Vec::<u32>::new}, val: Value(Scalar(<ZST>)) }
 -     }
 - 
--     bb1: {
+-     bb1 (cleanup): {
+-         resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
+-     }
+- 
+-     bb2: {
 +                                          // + span: $SRC_DIR/liballoc/vec.rs:LL:COL
 +                                          // + user_ty: UserType(0)
 +                                          // + literal: Const { ty: alloc::raw_vec::RawVec<u32>, val: Value(ByRef { alloc: Allocation { bytes: [4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [65535], len: Size { raw: 16 } }, size: Size { raw: 16 }, align: Align { pow2: 3 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
@@ -51,29 +55,28 @@
                                            // mir::Constant
                                            // + span: $DIR/inline-into-box-place.rs:7:11: 9:2
                                            // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
--         drop(_1) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
-+         drop(_1) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
+-         drop(_1) -> [return: bb3, unwind: bb1]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
++         drop(_1) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
       }
   
--     bb2: {
-+     bb1: {
-          StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
-          return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
+-     bb3: {
+-         StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
+-         return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
++     bb1 (cleanup): {
++         resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
       }
   
--     bb3 (cleanup): {
-+     bb2 (cleanup): {
-          resume;                          // scope 0 at $DIR/inline-into-box-place.rs:7:1: 9:2
--     }
-- 
 -     bb4 (cleanup): {
--         _3 = const alloc::alloc::box_free::<std::vec::Vec<u32>>(move (_2.0: std::ptr::Unique<std::vec::Vec<u32>>)) -> bb3; // scope 0 at $DIR/inline-into-box-place.rs:8:42: 8:43
+-         _3 = const alloc::alloc::box_free::<std::vec::Vec<u32>>(move (_2.0: std::ptr::Unique<std::vec::Vec<u32>>)) -> bb1; // scope 0 at $DIR/inline-into-box-place.rs:8:42: 8:43
 -                                          // ty::Const
 -                                          // + ty: unsafe fn(std::ptr::Unique<std::vec::Vec<u32>>) {alloc::alloc::box_free::<std::vec::Vec<u32>>}
 -                                          // + val: Value(Scalar(<ZST>))
 -                                          // mir::Constant
 -                                          // + span: $DIR/inline-into-box-place.rs:8:42: 8:43
 -                                          // + literal: Const { ty: unsafe fn(std::ptr::Unique<std::vec::Vec<u32>>) {alloc::alloc::box_free::<std::vec::Vec<u32>>}, val: Value(Scalar(<ZST>)) }
++     bb2: {
++         StorageDead(_1);                 // scope 0 at $DIR/inline-into-box-place.rs:9:1: 9:2
++         return;                          // scope 0 at $DIR/inline-into-box-place.rs:9:2: 9:2
       }
   }
   
diff --git a/src/test/mir-opt/issue-38669/rustc.main.SimplifyCfg-initial.after.mir b/src/test/mir-opt/issue-38669/rustc.main.SimplifyCfg-initial.after.mir
index 525254b15d4..fa7bd2563ae 100644
--- a/src/test/mir-opt/issue-38669/rustc.main.SimplifyCfg-initial.after.mir
+++ b/src/test/mir-opt/issue-38669/rustc.main.SimplifyCfg-initial.after.mir
@@ -21,26 +21,30 @@ fn main() -> () {
                                          // + span: $DIR/issue-38669.rs:5:28: 5:33
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
         FakeRead(ForLet, _1);            // scope 0 at $DIR/issue-38669.rs:5:9: 5:25
-        goto -> bb1;                     // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
+        goto -> bb2;                     // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
     }
 
-    bb1: {
-        falseUnwind -> [real: bb2, cleanup: bb6]; // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-38669.rs:4:1: 12:2
     }
 
     bb2: {
+        falseUnwind -> [real: bb3, cleanup: bb1]; // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
+    }
+
+    bb3: {
         StorageLive(_3);                 // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
         StorageLive(_4);                 // scope 1 at $DIR/issue-38669.rs:7:12: 7:24
         _4 = _1;                         // scope 1 at $DIR/issue-38669.rs:7:12: 7:24
         FakeRead(ForMatchedPlace, _4);   // scope 1 at $DIR/issue-38669.rs:7:12: 7:24
-        switchInt(_4) -> [false: bb4, otherwise: bb3]; // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
+        switchInt(_4) -> [false: bb5, otherwise: bb4]; // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
     }
 
-    bb3: {
-        falseEdges -> [real: bb5, imaginary: bb4]; // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
+    bb4: {
+        falseEdges -> [real: bb6, imaginary: bb5]; // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
     }
 
-    bb4: {
+    bb5: {
         _3 = const ();                   // scope 1 at $DIR/issue-38669.rs:7:9: 9:10
                                          // ty::Const
                                          // + ty: ()
@@ -64,10 +68,10 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-38669.rs:6:10: 11:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb1;                     // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
+        goto -> bb2;                     // scope 1 at $DIR/issue-38669.rs:6:5: 11:6
     }
 
-    bb5: {
+    bb6: {
         _0 = const ();                   // scope 1 at $DIR/issue-38669.rs:8:13: 8:18
                                          // ty::Const
                                          // + ty: ()
@@ -80,8 +84,4 @@ fn main() -> () {
         StorageDead(_1);                 // scope 0 at $DIR/issue-38669.rs:12:1: 12:2
         return;                          // scope 0 at $DIR/issue-38669.rs:12:2: 12:2
     }
-
-    bb6 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-38669.rs:4:1: 12:2
-    }
 }
diff --git a/src/test/mir-opt/issue-41110/rustc.main.ElaborateDrops.after.mir b/src/test/mir-opt/issue-41110/rustc.main.ElaborateDrops.after.mir
index 3272ca8454e..77763f2d3a0 100644
--- a/src/test/mir-opt/issue-41110/rustc.main.ElaborateDrops.after.mir
+++ b/src/test/mir-opt/issue-41110/rustc.main.ElaborateDrops.after.mir
@@ -32,7 +32,7 @@ fn main() -> () {
         StorageLive(_3);                 // scope 0 at $DIR/issue-41110.rs:8:21: 8:27
         StorageLive(_4);                 // scope 0 at $DIR/issue-41110.rs:8:21: 8:22
         _4 = S;                          // scope 0 at $DIR/issue-41110.rs:8:21: 8:22
-        _3 = const S::id(move _4) -> [return: bb1, unwind: bb4]; // scope 0 at $DIR/issue-41110.rs:8:21: 8:27
+        _3 = const S::id(move _4) -> [return: bb2, unwind: bb4]; // scope 0 at $DIR/issue-41110.rs:8:21: 8:27
                                          // ty::Const
                                          // + ty: fn(S) -> S {S::id}
                                          // + val: Value(Scalar(<ZST>))
@@ -41,7 +41,11 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(S) -> S {S::id}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-41110.rs:7:1: 9:2
+    }
+
+    bb2: {
         StorageDead(_4);                 // scope 0 at $DIR/issue-41110.rs:8:26: 8:27
         _5 = const false;                // scope 0 at $DIR/issue-41110.rs:8:13: 8:28
                                          // ty::Const
@@ -50,7 +54,7 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-41110.rs:8:13: 8:28
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
-        _1 = const S::other(move _2, move _3) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/issue-41110.rs:8:13: 8:28
+        _1 = const S::other(move _2, move _3) -> [return: bb6, unwind: bb5]; // scope 0 at $DIR/issue-41110.rs:8:13: 8:28
                                          // ty::Const
                                          // + ty: fn(S, S) {S::other}
                                          // + val: Value(Scalar(<ZST>))
@@ -59,7 +63,19 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(S, S) {S::other}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb2: {
+    bb3 (cleanup): {
+        goto -> bb9;                     // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+    }
+
+    bb4 (cleanup): {
+        goto -> bb3;                     // scope 0 at $DIR/issue-41110.rs:8:26: 8:27
+    }
+
+    bb5 (cleanup): {
+        goto -> bb3;                     // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+    }
+
+    bb6: {
         StorageDead(_3);                 // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
         _5 = const false;                // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
                                          // ty::Const
@@ -80,27 +96,22 @@ fn main() -> () {
         return;                          // scope 0 at $DIR/issue-41110.rs:9:2: 9:2
     }
 
-    bb3 (cleanup): {
-        goto -> bb5;                     // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
-    }
-
-    bb4 (cleanup): {
-        goto -> bb5;                     // scope 0 at $DIR/issue-41110.rs:8:26: 8:27
-    }
-
-    bb5 (cleanup): {
-        goto -> bb8;                     // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
-    }
-
-    bb6 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-41110.rs:7:1: 9:2
-    }
-
     bb7 (cleanup): {
-        drop(_2) -> bb6;                 // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+        drop(_2) -> bb1;                 // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
     }
 
     bb8 (cleanup): {
-        switchInt(_5) -> [false: bb6, otherwise: bb7]; // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+        _5 = const false;                // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+                                         // ty::Const
+                                         // + ty: bool
+                                         // + val: Value(Scalar(0x00))
+                                         // mir::Constant
+                                         // + span: $DIR/issue-41110.rs:8:27: 8:28
+                                         // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
+        goto -> bb7;                     // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
+    }
+
+    bb9 (cleanup): {
+        switchInt(_5) -> [false: bb1, otherwise: bb8]; // scope 0 at $DIR/issue-41110.rs:8:27: 8:28
     }
 }
diff --git a/src/test/mir-opt/issue-41110/rustc.test.ElaborateDrops.after.mir b/src/test/mir-opt/issue-41110/rustc.test.ElaborateDrops.after.mir
index 99da0398d96..a99846bd15d 100644
--- a/src/test/mir-opt/issue-41110/rustc.test.ElaborateDrops.after.mir
+++ b/src/test/mir-opt/issue-41110/rustc.test.ElaborateDrops.after.mir
@@ -37,7 +37,7 @@ fn test() -> () {
         StorageLive(_3);                 // scope 2 at $DIR/issue-41110.rs:17:5: 17:12
         StorageLive(_4);                 // scope 2 at $DIR/issue-41110.rs:17:10: 17:11
         _4 = move _2;                    // scope 2 at $DIR/issue-41110.rs:17:10: 17:11
-        _3 = const std::mem::drop::<S>(move _4) -> [return: bb1, unwind: bb7]; // scope 2 at $DIR/issue-41110.rs:17:5: 17:12
+        _3 = const std::mem::drop::<S>(move _4) -> [return: bb2, unwind: bb5]; // scope 2 at $DIR/issue-41110.rs:17:5: 17:12
                                          // ty::Const
                                          // + ty: fn(S) {std::mem::drop::<S>}
                                          // + val: Value(Scalar(<ZST>))
@@ -46,7 +46,11 @@ fn test() -> () {
                                          // + literal: Const { ty: fn(S) {std::mem::drop::<S>}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-41110.rs:14:1: 19:2
+    }
+
+    bb2: {
         StorageDead(_4);                 // scope 2 at $DIR/issue-41110.rs:17:11: 17:12
         StorageDead(_3);                 // scope 2 at $DIR/issue-41110.rs:17:12: 17:13
         StorageLive(_5);                 // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
@@ -61,11 +65,27 @@ fn test() -> () {
         goto -> bb12;                    // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
     }
 
-    bb2: {
-        goto -> bb3;                     // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
+    bb3 (cleanup): {
+        goto -> bb15;                    // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+    }
+
+    bb4 (cleanup): {
+        goto -> bb3;                     // scope 1 at $DIR/issue-41110.rs:19:1: 19:2
+    }
+
+    bb5 (cleanup): {
+        goto -> bb4;                     // scope 2 at $DIR/issue-41110.rs:17:11: 17:12
+    }
+
+    bb6: {
+        goto -> bb8;                     // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
+    }
+
+    bb7 (cleanup): {
+        goto -> bb4;                     // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
     }
 
-    bb3: {
+    bb8: {
         StorageDead(_5);                 // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
         _0 = const ();                   // scope 0 at $DIR/issue-41110.rs:14:15: 19:2
                                          // ty::Const
@@ -74,15 +94,15 @@ fn test() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-41110.rs:14:15: 19:2
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        drop(_2) -> [return: bb4, unwind: bb9]; // scope 1 at $DIR/issue-41110.rs:19:1: 19:2
+        drop(_2) -> [return: bb9, unwind: bb3]; // scope 1 at $DIR/issue-41110.rs:19:1: 19:2
     }
 
-    bb4: {
+    bb9: {
         StorageDead(_2);                 // scope 1 at $DIR/issue-41110.rs:19:1: 19:2
-        goto -> bb5;                     // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+        goto -> bb10;                    // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
     }
 
-    bb5: {
+    bb10: {
         _6 = const false;                // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
                                          // ty::Const
                                          // + ty: bool
@@ -94,41 +114,32 @@ fn test() -> () {
         return;                          // scope 0 at $DIR/issue-41110.rs:19:2: 19:2
     }
 
-    bb6 (cleanup): {
-        goto -> bb8;                     // scope 2 at $DIR/issue-41110.rs:18:9: 18:10
-    }
-
-    bb7 (cleanup): {
-        goto -> bb8;                     // scope 2 at $DIR/issue-41110.rs:17:11: 17:12
-    }
-
-    bb8 (cleanup): {
-        goto -> bb9;                     // scope 1 at $DIR/issue-41110.rs:19:1: 19:2
-    }
-
-    bb9 (cleanup): {
-        goto -> bb14;                    // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
-    }
-
-    bb10 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-41110.rs:14:1: 19:2
-    }
-
     bb11 (cleanup): {
         _2 = move _5;                    // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
-        goto -> bb6;                     // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
+        goto -> bb7;                     // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
     }
 
     bb12: {
         _2 = move _5;                    // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
-        goto -> bb2;                     // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
+        goto -> bb6;                     // scope 2 at $DIR/issue-41110.rs:18:5: 18:6
     }
 
     bb13 (cleanup): {
-        drop(_1) -> bb10;                // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+        drop(_1) -> bb1;                 // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
     }
 
     bb14 (cleanup): {
-        switchInt(_6) -> [false: bb10, otherwise: bb13]; // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+        _6 = const false;                // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+                                         // ty::Const
+                                         // + ty: bool
+                                         // + val: Value(Scalar(0x00))
+                                         // mir::Constant
+                                         // + span: $DIR/issue-41110.rs:19:1: 19:2
+                                         // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
+        goto -> bb13;                    // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
+    }
+
+    bb15 (cleanup): {
+        switchInt(_6) -> [false: bb1, otherwise: bb14]; // scope 0 at $DIR/issue-41110.rs:19:1: 19:2
     }
 }
diff --git a/src/test/mir-opt/issue-41697/32bit/rustc.{{impl}}-{{constant}}.SimplifyCfg-qualify-consts.after.mir b/src/test/mir-opt/issue-41697/32bit/rustc.{{impl}}-{{constant}}.SimplifyCfg-qualify-consts.after.mir
index 0588ec9b4ce..d263b2515f1 100644
--- a/src/test/mir-opt/issue-41697/32bit/rustc.{{impl}}-{{constant}}.SimplifyCfg-qualify-consts.after.mir
+++ b/src/test/mir-opt/issue-41697/32bit/rustc.{{impl}}-{{constant}}.SimplifyCfg-qualify-consts.after.mir
@@ -18,15 +18,15 @@
                                          // mir::Constant
                                          // + span: $DIR/issue-41697.rs:18:21: 18:22
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x00000001)) }
-        assert(!move (_1.1: bool), "attempt to add with overflow") -> [success: bb1, unwind: bb2]; // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+        assert(!move (_1.1: bool), "attempt to add with overflow") -> [success: bb2, unwind: bb1]; // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 
-    bb1: {
-        _0 = move (_1.0: usize);         // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
-        return;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 
-    bb2 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+    bb2: {
+        _0 = move (_1.0: usize);         // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+        return;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 }
diff --git a/src/test/mir-opt/issue-41697/64bit/rustc.{{impl}}-{{constant}}.SimplifyCfg-qualify-consts.after.mir b/src/test/mir-opt/issue-41697/64bit/rustc.{{impl}}-{{constant}}.SimplifyCfg-qualify-consts.after.mir
index 4040403ffa0..6c00f49fb75 100644
--- a/src/test/mir-opt/issue-41697/64bit/rustc.{{impl}}-{{constant}}.SimplifyCfg-qualify-consts.after.mir
+++ b/src/test/mir-opt/issue-41697/64bit/rustc.{{impl}}-{{constant}}.SimplifyCfg-qualify-consts.after.mir
@@ -18,15 +18,15 @@
                                          // mir::Constant
                                          // + span: $DIR/issue-41697.rs:18:21: 18:22
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x0000000000000001)) }
-        assert(!move (_1.1: bool), "attempt to add with overflow") -> [success: bb1, unwind: bb2]; // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+        assert(!move (_1.1: bool), "attempt to add with overflow") -> [success: bb2, unwind: bb1]; // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 
-    bb1: {
-        _0 = move (_1.0: usize);         // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
-        return;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 
-    bb2 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+    bb2: {
+        _0 = move (_1.0: usize);         // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
+        return;                          // scope 0 at $DIR/issue-41697.rs:18:19: 18:22
     }
 }
diff --git a/src/test/mir-opt/issue-41888/rustc.main.ElaborateDrops.after.mir b/src/test/mir-opt/issue-41888/rustc.main.ElaborateDrops.after.mir
index b64dd5c3776..ce940273c3e 100644
--- a/src/test/mir-opt/issue-41888/rustc.main.ElaborateDrops.after.mir
+++ b/src/test/mir-opt/issue-41888/rustc.main.ElaborateDrops.after.mir
@@ -44,7 +44,7 @@ fn main() -> () {
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
         StorageLive(_1);                 // scope 0 at $DIR/issue-41888.rs:7:9: 7:10
         StorageLive(_2);                 // scope 1 at $DIR/issue-41888.rs:8:8: 8:14
-        _2 = const cond() -> [return: bb1, unwind: bb11]; // scope 1 at $DIR/issue-41888.rs:8:8: 8:14
+        _2 = const cond() -> [return: bb2, unwind: bb3]; // scope 1 at $DIR/issue-41888.rs:8:8: 8:14
                                          // ty::Const
                                          // + ty: fn() -> bool {cond}
                                          // + val: Value(Scalar(<ZST>))
@@ -53,11 +53,19 @@ fn main() -> () {
                                          // + literal: Const { ty: fn() -> bool {cond}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
-        switchInt(_2) -> [false: bb2, otherwise: bb3]; // scope 1 at $DIR/issue-41888.rs:8:5: 14:6
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-41888.rs:6:1: 15:2
     }
 
     bb2: {
+        switchInt(_2) -> [false: bb4, otherwise: bb5]; // scope 1 at $DIR/issue-41888.rs:8:5: 14:6
+    }
+
+    bb3 (cleanup): {
+        goto -> bb1;                     // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    }
+
+    bb4: {
         _0 = const ();                   // scope 1 at $DIR/issue-41888.rs:8:5: 14:6
                                          // ty::Const
                                          // + ty: ()
@@ -65,10 +73,10 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-41888.rs:8:5: 14:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb8;                     // scope 1 at $DIR/issue-41888.rs:8:5: 14:6
+        goto -> bb11;                    // scope 1 at $DIR/issue-41888.rs:8:5: 14:6
     }
 
-    bb3: {
+    bb5: {
         StorageLive(_3);                 // scope 1 at $DIR/issue-41888.rs:9:13: 9:20
         StorageLive(_4);                 // scope 1 at $DIR/issue-41888.rs:9:18: 9:19
         _4 = K;                          // scope 1 at $DIR/issue-41888.rs:9:18: 9:19
@@ -77,17 +85,21 @@ fn main() -> () {
         goto -> bb14;                    // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
     }
 
-    bb4: {
-        goto -> bb5;                     // scope 1 at $DIR/issue-41888.rs:9:19: 9:20
+    bb6: {
+        goto -> bb8;                     // scope 1 at $DIR/issue-41888.rs:9:19: 9:20
     }
 
-    bb5: {
+    bb7 (cleanup): {
+        goto -> bb3;                     // scope 1 at $DIR/issue-41888.rs:9:19: 9:20
+    }
+
+    bb8: {
         StorageDead(_3);                 // scope 1 at $DIR/issue-41888.rs:9:19: 9:20
         _5 = discriminant(_1);           // scope 1 at $DIR/issue-41888.rs:10:16: 10:24
-        switchInt(move _5) -> [0isize: bb7, otherwise: bb6]; // scope 1 at $DIR/issue-41888.rs:10:16: 10:24
+        switchInt(move _5) -> [0isize: bb10, otherwise: bb9]; // scope 1 at $DIR/issue-41888.rs:10:16: 10:24
     }
 
-    bb6: {
+    bb9: {
         _0 = const ();                   // scope 1 at $DIR/issue-41888.rs:10:9: 13:10
                                          // ty::Const
                                          // + ty: ()
@@ -95,10 +107,10 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-41888.rs:10:9: 13:10
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb8;                     // scope 1 at $DIR/issue-41888.rs:10:9: 13:10
+        goto -> bb11;                    // scope 1 at $DIR/issue-41888.rs:10:9: 13:10
     }
 
-    bb7: {
+    bb10: {
         StorageLive(_6);                 // scope 1 at $DIR/issue-41888.rs:10:21: 10:23
         _9 = const false;                // scope 1 at $DIR/issue-41888.rs:10:21: 10:23
                                          // ty::Const
@@ -116,14 +128,14 @@ fn main() -> () {
                                          // + span: $DIR/issue-41888.rs:10:29: 13:10
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
         StorageDead(_6);                 // scope 1 at $DIR/issue-41888.rs:13:9: 13:10
-        goto -> bb8;                     // scope 1 at $DIR/issue-41888.rs:10:9: 13:10
+        goto -> bb11;                    // scope 1 at $DIR/issue-41888.rs:10:9: 13:10
     }
 
-    bb8: {
-        goto -> bb20;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    bb11: {
+        goto -> bb21;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
-    bb9: {
+    bb12: {
         _7 = const false;                // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
                                          // ty::Const
                                          // + ty: bool
@@ -150,18 +162,6 @@ fn main() -> () {
         return;                          // scope 0 at $DIR/issue-41888.rs:15:2: 15:2
     }
 
-    bb10 (cleanup): {
-        goto -> bb11;                    // scope 1 at $DIR/issue-41888.rs:9:19: 9:20
-    }
-
-    bb11 (cleanup): {
-        goto -> bb12;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
-    }
-
-    bb12 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-41888.rs:6:1: 15:2
-    }
-
     bb13 (cleanup): {
         _7 = const true;                 // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
                                          // ty::Const
@@ -185,7 +185,7 @@ fn main() -> () {
                                          // + span: $DIR/issue-41888.rs:9:9: 9:10
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
         _1 = move _3;                    // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
-        goto -> bb10;                    // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
+        goto -> bb7;                     // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
     }
 
     bb14: {
@@ -211,7 +211,7 @@ fn main() -> () {
                                          // + span: $DIR/issue-41888.rs:9:9: 9:10
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
         _1 = move _3;                    // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
-        goto -> bb4;                     // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
+        goto -> bb6;                     // scope 1 at $DIR/issue-41888.rs:9:9: 9:10
     }
 
     bb15: {
@@ -222,36 +222,47 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-41888.rs:15:1: 15:2
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
-        goto -> bb9;                     // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        goto -> bb12;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
     bb16 (cleanup): {
-        goto -> bb12;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        _7 = const false;                // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+                                         // ty::Const
+                                         // + ty: bool
+                                         // + val: Value(Scalar(0x00))
+                                         // mir::Constant
+                                         // + span: $DIR/issue-41888.rs:15:1: 15:2
+                                         // + literal: Const { ty: bool, val: Value(Scalar(0x00)) }
+        goto -> bb1;                     // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
-    bb17: {
-        drop(_1) -> [return: bb15, unwind: bb12]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    bb17 (cleanup): {
+        goto -> bb16;                    // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
-    bb18 (cleanup): {
-        drop(_1) -> bb12;                // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    bb18: {
+        drop(_1) -> [return: bb15, unwind: bb16]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
-    bb19: {
-        _10 = discriminant(_1);          // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
-        switchInt(move _10) -> [0isize: bb15, otherwise: bb17]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    bb19 (cleanup): {
+        drop(_1) -> bb16;                // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
     bb20: {
-        switchInt(_7) -> [false: bb15, otherwise: bb19]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        _10 = discriminant(_1);          // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        switchInt(move _10) -> [0isize: bb15, otherwise: bb18]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
-    bb21 (cleanup): {
-        _11 = discriminant(_1);          // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
-        switchInt(move _11) -> [0isize: bb16, otherwise: bb18]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    bb21: {
+        switchInt(_7) -> [false: bb15, otherwise: bb20]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 
     bb22 (cleanup): {
-        switchInt(_7) -> [false: bb12, otherwise: bb21]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        _11 = discriminant(_1);          // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+        switchInt(move _11) -> [0isize: bb17, otherwise: bb19]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
+    }
+
+    bb23 (cleanup): {
+        switchInt(_7) -> [false: bb16, otherwise: bb22]; // scope 0 at $DIR/issue-41888.rs:15:1: 15:2
     }
 }
diff --git a/src/test/mir-opt/issue-49232/rustc.main.mir_map.0.mir b/src/test/mir-opt/issue-49232/rustc.main.mir_map.0.mir
index 75c1ca5af92..abf33cce133 100644
--- a/src/test/mir-opt/issue-49232/rustc.main.mir_map.0.mir
+++ b/src/test/mir-opt/issue-49232/rustc.main.mir_map.0.mir
@@ -17,10 +17,14 @@ fn main() -> () {
     }
 
     bb1: {
-        falseUnwind -> [real: bb2, cleanup: bb11]; // scope 0 at $DIR/issue-49232.rs:6:5: 14:6
+        falseUnwind -> [real: bb3, cleanup: bb4]; // scope 0 at $DIR/issue-49232.rs:6:5: 14:6
     }
 
     bb2: {
+        goto -> bb14;                    // scope 0 at $DIR/issue-49232.rs:15:2: 15:2
+    }
+
+    bb3: {
         StorageLive(_2);                 // scope 0 at $DIR/issue-49232.rs:7:13: 7:19
         StorageLive(_3);                 // scope 0 at $DIR/issue-49232.rs:8:19: 8:23
         _3 = const true;                 // scope 0 at $DIR/issue-49232.rs:8:19: 8:23
@@ -31,14 +35,18 @@ fn main() -> () {
                                          // + span: $DIR/issue-49232.rs:8:19: 8:23
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
         FakeRead(ForMatchedPlace, _3);   // scope 0 at $DIR/issue-49232.rs:8:19: 8:23
-        switchInt(_3) -> [false: bb3, otherwise: bb4]; // scope 0 at $DIR/issue-49232.rs:9:17: 9:22
+        switchInt(_3) -> [false: bb5, otherwise: bb6]; // scope 0 at $DIR/issue-49232.rs:9:17: 9:22
     }
 
-    bb3: {
-        falseEdges -> [real: bb5, imaginary: bb4]; // scope 0 at $DIR/issue-49232.rs:9:17: 9:22
+    bb4 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-49232.rs:5:1: 15:2
+    }
+
+    bb5: {
+        falseEdges -> [real: bb7, imaginary: bb6]; // scope 0 at $DIR/issue-49232.rs:9:17: 9:22
     }
 
-    bb4: {
+    bb6: {
         _0 = const ();                   // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
                                          // ty::Const
                                          // + ty: ()
@@ -46,10 +54,10 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-49232.rs:10:25: 10:30
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb10;                    // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
+        goto -> bb8;                     // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
     }
 
-    bb5: {
+    bb7: {
         _2 = const 4i32;                 // scope 0 at $DIR/issue-49232.rs:9:26: 9:27
                                          // ty::Const
                                          // + ty: i32
@@ -57,10 +65,20 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/issue-49232.rs:9:26: 9:27
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000004)) }
-        goto -> bb8;                     // scope 0 at $DIR/issue-49232.rs:8:13: 11:14
+        goto -> bb12;                    // scope 0 at $DIR/issue-49232.rs:8:13: 11:14
     }
 
-    bb6: {
+    bb8: {
+        StorageDead(_3);                 // scope 0 at $DIR/issue-49232.rs:12:10: 12:11
+        goto -> bb9;                     // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
+    }
+
+    bb9: {
+        StorageDead(_2);                 // scope 0 at $DIR/issue-49232.rs:14:5: 14:6
+        goto -> bb2;                     // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
+    }
+
+    bb10: {
         _4 = const ();                   // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
                                          // ty::Const
                                          // + ty: ()
@@ -71,17 +89,17 @@ fn main() -> () {
         unreachable;                     // scope 0 at $DIR/issue-49232.rs:10:25: 10:30
     }
 
-    bb7: {
-        goto -> bb8;                     // scope 0 at $DIR/issue-49232.rs:8:13: 11:14
+    bb11: {
+        goto -> bb12;                    // scope 0 at $DIR/issue-49232.rs:8:13: 11:14
     }
 
-    bb8: {
+    bb12: {
         FakeRead(ForLet, _2);            // scope 0 at $DIR/issue-49232.rs:7:13: 7:19
         StorageDead(_3);                 // scope 0 at $DIR/issue-49232.rs:12:10: 12:11
         StorageLive(_5);                 // scope 1 at $DIR/issue-49232.rs:13:9: 13:22
         StorageLive(_6);                 // scope 1 at $DIR/issue-49232.rs:13:14: 13:21
         _6 = &_2;                        // scope 1 at $DIR/issue-49232.rs:13:14: 13:21
-        _5 = const std::mem::drop::<&i32>(move _6) -> [return: bb9, unwind: bb11]; // scope 1 at $DIR/issue-49232.rs:13:9: 13:22
+        _5 = const std::mem::drop::<&i32>(move _6) -> [return: bb13, unwind: bb4]; // scope 1 at $DIR/issue-49232.rs:13:9: 13:22
                                          // ty::Const
                                          // + ty: fn(&i32) {std::mem::drop::<&i32>}
                                          // + val: Value(Scalar(<ZST>))
@@ -90,7 +108,7 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(&i32) {std::mem::drop::<&i32>}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb9: {
+    bb13: {
         StorageDead(_6);                 // scope 1 at $DIR/issue-49232.rs:13:21: 13:22
         StorageDead(_5);                 // scope 1 at $DIR/issue-49232.rs:13:22: 13:23
         _1 = const ();                   // scope 0 at $DIR/issue-49232.rs:6:10: 14:6
@@ -104,13 +122,7 @@ fn main() -> () {
         goto -> bb1;                     // scope 0 at $DIR/issue-49232.rs:6:5: 14:6
     }
 
-    bb10: {
-        StorageDead(_3);                 // scope 0 at $DIR/issue-49232.rs:12:10: 12:11
-        StorageDead(_2);                 // scope 0 at $DIR/issue-49232.rs:14:5: 14:6
+    bb14: {
         return;                          // scope 0 at $DIR/issue-49232.rs:15:2: 15:2
     }
-
-    bb11 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-49232.rs:5:1: 15:2
-    }
 }
diff --git a/src/test/mir-opt/issue-62289/rustc.test.ElaborateDrops.before.mir b/src/test/mir-opt/issue-62289/rustc.test.ElaborateDrops.before.mir
index f59d157d297..0b8b03961f2 100644
--- a/src/test/mir-opt/issue-62289/rustc.test.ElaborateDrops.before.mir
+++ b/src/test/mir-opt/issue-62289/rustc.test.ElaborateDrops.before.mir
@@ -30,7 +30,7 @@ fn test() -> std::option::Option<std::boxed::Box<u32>> {
         StorageLive(_3);                 // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
         StorageLive(_4);                 // scope 0 at $DIR/issue-62289.rs:9:15: 9:19
         _4 = std::option::Option::<u32>::None; // scope 0 at $DIR/issue-62289.rs:9:15: 9:19
-        _3 = const <std::option::Option<u32> as std::ops::Try>::into_result(move _4) -> [return: bb1, unwind: bb12]; // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
+        _3 = const <std::option::Option<u32> as std::ops::Try>::into_result(move _4) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
                                          // ty::Const
                                          // + ty: fn(std::option::Option<u32>) -> std::result::Result<<std::option::Option<u32> as std::ops::Try>::Ok, <std::option::Option<u32> as std::ops::Try>::Error> {<std::option::Option<u32> as std::ops::Try>::into_result}
                                          // + val: Value(Scalar(<ZST>))
@@ -39,32 +39,40 @@ fn test() -> std::option::Option<std::boxed::Box<u32>> {
                                          // + literal: Const { ty: fn(std::option::Option<u32>) -> std::result::Result<<std::option::Option<u32> as std::ops::Try>::Ok, <std::option::Option<u32> as std::ops::Try>::Error> {<std::option::Option<u32> as std::ops::Try>::into_result}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/issue-62289.rs:8:1: 10:2
+    }
+
+    bb2: {
         StorageDead(_4);                 // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
         _5 = discriminant(_3);           // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
-        switchInt(move _5) -> [0isize: bb2, 1isize: bb4, otherwise: bb3]; // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
+        switchInt(move _5) -> [0isize: bb4, 1isize: bb6, otherwise: bb5]; // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
     }
 
-    bb2: {
+    bb3 (cleanup): {
+        drop(_2) -> bb1;                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
+    }
+
+    bb4: {
         StorageLive(_10);                // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
         _10 = ((_3 as Ok).0: u32);       // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
         (*_2) = _10;                     // scope 4 at $DIR/issue-62289.rs:9:15: 9:20
         StorageDead(_10);                // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
         _1 = move _2;                    // scope 0 at $DIR/issue-62289.rs:9:10: 9:21
-        drop(_2) -> [return: bb7, unwind: bb11]; // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
+        drop(_2) -> [return: bb12, unwind: bb11]; // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
     }
 
-    bb3: {
+    bb5: {
         unreachable;                     // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
     }
 
-    bb4: {
+    bb6: {
         StorageLive(_6);                 // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
         _6 = ((_3 as Err).0: std::option::NoneError); // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
         StorageLive(_8);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
         StorageLive(_9);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
         _9 = _6;                         // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
-        _8 = const <std::option::NoneError as std::convert::From<std::option::NoneError>>::from(move _9) -> [return: bb5, unwind: bb12]; // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
+        _8 = const <std::option::NoneError as std::convert::From<std::option::NoneError>>::from(move _9) -> [return: bb8, unwind: bb3]; // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
                                          // ty::Const
                                          // + ty: fn(std::option::NoneError) -> std::option::NoneError {<std::option::NoneError as std::convert::From<std::option::NoneError>>::from}
                                          // + val: Value(Scalar(<ZST>))
@@ -73,9 +81,13 @@ fn test() -> std::option::Option<std::boxed::Box<u32>> {
                                          // + literal: Const { ty: fn(std::option::NoneError) -> std::option::NoneError {<std::option::NoneError as std::convert::From<std::option::NoneError>>::from}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb5: {
+    bb7: {
+        return;                          // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
+    }
+
+    bb8: {
         StorageDead(_9);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
-        _0 = const <std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::from_error(move _8) -> [return: bb6, unwind: bb12]; // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
+        _0 = const <std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::from_error(move _8) -> [return: bb9, unwind: bb3]; // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
                                          // ty::Const
                                          // + ty: fn(<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::Error) -> std::option::Option<std::boxed::Box<u32>> {<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::from_error}
                                          // + val: Value(Scalar(<ZST>))
@@ -84,44 +96,32 @@ fn test() -> std::option::Option<std::boxed::Box<u32>> {
                                          // + literal: Const { ty: fn(<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::Error) -> std::option::Option<std::boxed::Box<u32>> {<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::from_error}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb6: {
+    bb9: {
         StorageDead(_8);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
         StorageDead(_6);                 // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
-        drop(_2) -> bb9;                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
-    }
-
-    bb7: {
-        StorageDead(_2);                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
-        _0 = std::option::Option::<std::boxed::Box<u32>>::Some(move _1); // scope 0 at $DIR/issue-62289.rs:9:5: 9:22
-        drop(_1) -> bb8;                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
+        drop(_2) -> bb10;                // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
     }
 
-    bb8: {
-        StorageDead(_1);                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
-        StorageDead(_3);                 // scope 0 at $DIR/issue-62289.rs:10:1: 10:2
-        goto -> bb10;                    // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
-    }
-
-    bb9: {
+    bb10: {
         StorageDead(_2);                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
         StorageDead(_1);                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
         StorageDead(_3);                 // scope 0 at $DIR/issue-62289.rs:10:1: 10:2
-        goto -> bb10;                    // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
-    }
-
-    bb10: {
-        return;                          // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
+        goto -> bb7;                     // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
     }
 
     bb11 (cleanup): {
-        drop(_1) -> bb13;                // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
+        drop(_1) -> bb1;                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
     }
 
-    bb12 (cleanup): {
-        drop(_2) -> bb13;                // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
+    bb12: {
+        StorageDead(_2);                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
+        _0 = std::option::Option::<std::boxed::Box<u32>>::Some(move _1); // scope 0 at $DIR/issue-62289.rs:9:5: 9:22
+        drop(_1) -> bb13;                // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
     }
 
-    bb13 (cleanup): {
-        resume;                          // scope 0 at $DIR/issue-62289.rs:8:1: 10:2
+    bb13: {
+        StorageDead(_1);                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
+        StorageDead(_3);                 // scope 0 at $DIR/issue-62289.rs:10:1: 10:2
+        goto -> bb7;                     // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
     }
 }
diff --git a/src/test/mir-opt/loop_test/rustc.main.SimplifyCfg-qualify-consts.after.mir b/src/test/mir-opt/loop_test/rustc.main.SimplifyCfg-qualify-consts.after.mir
index 33c59bd3f14..38e04a6399f 100644
--- a/src/test/mir-opt/loop_test/rustc.main.SimplifyCfg-qualify-consts.after.mir
+++ b/src/test/mir-opt/loop_test/rustc.main.SimplifyCfg-qualify-consts.after.mir
@@ -23,14 +23,18 @@ fn main() -> () {
                                          // + span: $DIR/loop_test.rs:10:8: 10:12
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
         FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/loop_test.rs:10:8: 10:12
-        switchInt(_2) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/loop_test.rs:10:5: 12:6
+        switchInt(_2) -> [false: bb3, otherwise: bb2]; // scope 0 at $DIR/loop_test.rs:10:5: 12:6
     }
 
-    bb1: {
-        falseEdges -> [real: bb3, imaginary: bb2]; // scope 0 at $DIR/loop_test.rs:10:5: 12:6
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/loop_test.rs:6:1: 17:2
     }
 
     bb2: {
+        falseEdges -> [real: bb4, imaginary: bb3]; // scope 0 at $DIR/loop_test.rs:10:5: 12:6
+    }
+
+    bb3: {
         _1 = const ();                   // scope 0 at $DIR/loop_test.rs:10:5: 12:6
                                          // ty::Const
                                          // + ty: ()
@@ -41,10 +45,10 @@ fn main() -> () {
         StorageDead(_2);                 // scope 0 at $DIR/loop_test.rs:12:5: 12:6
         StorageDead(_1);                 // scope 0 at $DIR/loop_test.rs:12:5: 12:6
         StorageLive(_4);                 // scope 0 at $DIR/loop_test.rs:13:5: 16:6
-        goto -> bb4;                     // scope 0 at $DIR/loop_test.rs:13:5: 16:6
+        goto -> bb5;                     // scope 0 at $DIR/loop_test.rs:13:5: 16:6
     }
 
-    bb3: {
+    bb4: {
         _0 = const ();                   // scope 0 at $DIR/loop_test.rs:11:9: 11:15
                                          // ty::Const
                                          // + ty: ()
@@ -57,11 +61,11 @@ fn main() -> () {
         return;                          // scope 0 at $DIR/loop_test.rs:17:2: 17:2
     }
 
-    bb4: {
-        falseUnwind -> [real: bb5, cleanup: bb6]; // scope 0 at $DIR/loop_test.rs:13:5: 16:6
+    bb5: {
+        falseUnwind -> [real: bb6, cleanup: bb1]; // scope 0 at $DIR/loop_test.rs:13:5: 16:6
     }
 
-    bb5: {
+    bb6: {
         StorageLive(_6);                 // scope 0 at $DIR/loop_test.rs:14:13: 14:14
         _6 = const 1i32;                 // scope 0 at $DIR/loop_test.rs:14:17: 14:18
                                          // ty::Const
@@ -72,10 +76,6 @@ fn main() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
         FakeRead(ForLet, _6);            // scope 0 at $DIR/loop_test.rs:14:13: 14:14
         StorageDead(_6);                 // scope 0 at $DIR/loop_test.rs:16:5: 16:6
-        goto -> bb4;                     // scope 0 at $DIR/loop_test.rs:1:1: 1:1
-    }
-
-    bb6 (cleanup): {
-        resume;                          // scope 0 at $DIR/loop_test.rs:6:1: 17:2
+        goto -> bb5;                     // scope 0 at $DIR/loop_test.rs:15:9: 15:17
     }
 }
diff --git a/src/test/mir-opt/match-arm-scopes/rustc.complicated_match.ElaborateDrops.after.mir b/src/test/mir-opt/match-arm-scopes/rustc.complicated_match.ElaborateDrops.after.mir
index bca19398ce7..856248e90d4 100644
--- a/src/test/mir-opt/match-arm-scopes/rustc.complicated_match.ElaborateDrops.after.mir
+++ b/src/test/mir-opt/match-arm-scopes/rustc.complicated_match.ElaborateDrops.after.mir
@@ -30,26 +30,30 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
     }
 
     bb0: {
-        switchInt((_2.0: bool)) -> [false: bb5, otherwise: bb1]; // scope 0 at $DIR/match-arm-scopes.rs:16:10: 16:15
+        switchInt((_2.0: bool)) -> [false: bb6, otherwise: bb2]; // scope 0 at $DIR/match-arm-scopes.rs:16:10: 16:15
     }
 
-    bb1: {
-        switchInt((_2.1: bool)) -> [false: bb10, otherwise: bb2]; // scope 0 at $DIR/match-arm-scopes.rs:16:29: 16:34
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/match-arm-scopes.rs:14:1: 19:2
     }
 
     bb2: {
-        switchInt((_2.0: bool)) -> [false: bb3, otherwise: bb17]; // scope 0 at $DIR/match-arm-scopes.rs:17:10: 17:14
+        switchInt((_2.1: bool)) -> [false: bb14, otherwise: bb3]; // scope 0 at $DIR/match-arm-scopes.rs:16:29: 16:34
     }
 
     bb3: {
+        switchInt((_2.0: bool)) -> [false: bb4, otherwise: bb21]; // scope 0 at $DIR/match-arm-scopes.rs:17:10: 17:14
+    }
+
+    bb4: {
         StorageLive(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:32: 17:33
         _15 = (_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:17:32: 17:33
         StorageLive(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:35: 17:36
         _16 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:17:35: 17:36
-        goto -> bb16;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb20;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb4: {
+    bb5: {
         _0 = const 1i32;                 // scope 1 at $DIR/match-arm-scopes.rs:16:77: 16:78
                                          // ty::Const
                                          // + ty: i32
@@ -57,10 +61,10 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // mir::Constant
                                          // + span: $DIR/match-arm-scopes.rs:16:77: 16:78
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
-        drop(_7) -> [return: bb15, unwind: bb22]; // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        drop(_7) -> [return: bb19, unwind: bb10]; // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
     }
 
-    bb5: {
+    bb6: {
         StorageLive(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         _6 = &(_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         StorageLive(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
@@ -68,16 +72,16 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         StorageLive(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
         StorageLive(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         _10 = _1;                        // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
-        switchInt(_10) -> [false: bb6, otherwise: bb7]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(_10) -> [false: bb7, otherwise: bb8]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb6: {
+    bb7: {
         _9 = (*_6);                      // scope 0 at $DIR/match-arm-scopes.rs:16:70: 16:71
         StorageDead(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
-        switchInt(move _9) -> [false: bb9, otherwise: bb8]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(move _9) -> [false: bb13, otherwise: bb12]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb7: {
+    bb8: {
         _0 = const 3i32;                 // scope 0 at $DIR/match-arm-scopes.rs:16:59: 16:60
                                          // ty::Const
                                          // + ty: i32
@@ -87,26 +91,40 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
         StorageDead(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb20;                    // scope 0 at $DIR/match-arm-scopes.rs:1:1: 1:1
+        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        goto -> bb11;                    // scope 0 at $DIR/match-arm-scopes.rs:16:52: 16:60
     }
 
-    bb8: {
+    bb9: {
+        return;                          // scope 0 at $DIR/match-arm-scopes.rs:19:2: 19:2
+    }
+
+    bb10 (cleanup): {
+        goto -> bb25;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    }
+
+    bb11: {
+        drop(_2) -> [return: bb9, unwind: bb1]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    }
+
+    bb12: {
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageLive(_5);                 // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         _5 = (_2.1: bool);               // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         StorageLive(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
         _7 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
-        goto -> bb4;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb5;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb9: {
+    bb13: {
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb1;                     // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        goto -> bb2;                     // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb10: {
+    bb14: {
         StorageLive(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         _6 = &(_2.0: bool);              // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         StorageLive(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
@@ -114,16 +132,16 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         StorageLive(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
         StorageLive(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         _13 = _1;                        // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
-        switchInt(_13) -> [false: bb11, otherwise: bb12]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(_13) -> [false: bb15, otherwise: bb16]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb11: {
+    bb15: {
         _12 = (*_6);                     // scope 0 at $DIR/match-arm-scopes.rs:16:70: 16:71
         StorageDead(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
-        switchInt(move _12) -> [false: bb14, otherwise: bb13]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(move _12) -> [false: bb18, otherwise: bb17]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb12: {
+    bb16: {
         _0 = const 3i32;                 // scope 0 at $DIR/match-arm-scopes.rs:16:59: 16:60
                                          // ty::Const
                                          // + ty: i32
@@ -133,34 +151,36 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
         StorageDead(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb20;                    // scope 0 at $DIR/match-arm-scopes.rs:1:1: 1:1
+        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        goto -> bb11;                    // scope 0 at $DIR/match-arm-scopes.rs:16:52: 16:60
     }
 
-    bb13: {
+    bb17: {
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageLive(_5);                 // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         _5 = (_2.0: bool);               // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         StorageLive(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
         _7 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
-        goto -> bb4;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb5;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb14: {
+    bb18: {
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb2;                     // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        goto -> bb3;                     // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb15: {
+    bb19: {
         StorageDead(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_5);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb19;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb23;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb16: {
+    bb20: {
         _0 = const 2i32;                 // scope 2 at $DIR/match-arm-scopes.rs:17:41: 17:42
                                          // ty::Const
                                          // + ty: i32
@@ -168,58 +188,48 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // mir::Constant
                                          // + span: $DIR/match-arm-scopes.rs:17:41: 17:42
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
-        drop(_16) -> [return: bb18, unwind: bb22]; // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
+        drop(_16) -> [return: bb22, unwind: bb10]; // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
     }
 
-    bb17: {
+    bb21: {
         StorageLive(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:16: 17:17
         _15 = (_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:17:16: 17:17
         StorageLive(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:19: 17:20
         _16 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:17:19: 17:20
-        goto -> bb16;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb20;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb18: {
+    bb22: {
         StorageDead(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
         StorageDead(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
-        goto -> bb19;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb23;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb19: {
-        goto -> bb26;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb23: {
+        goto -> bb29;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb20: {
-        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        drop(_2) -> [return: bb21, unwind: bb23]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb24 (cleanup): {
+        goto -> bb1;                     // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb21: {
-        return;                          // scope 0 at $DIR/match-arm-scopes.rs:19:2: 19:2
-    }
-
-    bb22 (cleanup): {
-        goto -> bb27;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
-    }
-
-    bb23 (cleanup): {
-        resume;                          // scope 0 at $DIR/match-arm-scopes.rs:14:1: 19:2
+    bb25 (cleanup): {
+        goto -> bb24;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb24: {
-        goto -> bb21;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb26: {
+        goto -> bb9;                     // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb25 (cleanup): {
-        goto -> bb23;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb27 (cleanup): {
+        goto -> bb1;                     // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb26: {
-        goto -> bb24;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb28 (cleanup): {
+        goto -> bb27;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 
-    bb27 (cleanup): {
-        goto -> bb23;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    bb29: {
+        goto -> bb26;                    // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 }
diff --git a/src/test/mir-opt/match-arm-scopes/rustc.complicated_match.SimplifyCfg-initial.after.mir b/src/test/mir-opt/match-arm-scopes/rustc.complicated_match.SimplifyCfg-initial.after.mir
index 952aa0e804a..63974bda260 100644
--- a/src/test/mir-opt/match-arm-scopes/rustc.complicated_match.SimplifyCfg-initial.after.mir
+++ b/src/test/mir-opt/match-arm-scopes/rustc.complicated_match.SimplifyCfg-initial.after.mir
@@ -31,38 +31,42 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
 
     bb0: {
         FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/match-arm-scopes.rs:15:11: 15:16
-        switchInt((_2.0: bool)) -> [false: bb1, otherwise: bb2]; // scope 0 at $DIR/match-arm-scopes.rs:16:10: 16:15
+        switchInt((_2.0: bool)) -> [false: bb2, otherwise: bb3]; // scope 0 at $DIR/match-arm-scopes.rs:16:10: 16:15
     }
 
-    bb1: {
-        falseEdges -> [real: bb8, imaginary: bb3]; // scope 0 at $DIR/match-arm-scopes.rs:16:9: 16:22
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/match-arm-scopes.rs:14:1: 19:2
     }
 
     bb2: {
-        switchInt((_2.1: bool)) -> [false: bb3, otherwise: bb4]; // scope 0 at $DIR/match-arm-scopes.rs:16:29: 16:34
+        falseEdges -> [real: bb9, imaginary: bb4]; // scope 0 at $DIR/match-arm-scopes.rs:16:9: 16:22
     }
 
     bb3: {
-        falseEdges -> [real: bb14, imaginary: bb5]; // scope 0 at $DIR/match-arm-scopes.rs:16:25: 16:38
+        switchInt((_2.1: bool)) -> [false: bb4, otherwise: bb5]; // scope 0 at $DIR/match-arm-scopes.rs:16:29: 16:34
     }
 
     bb4: {
-        switchInt((_2.0: bool)) -> [false: bb6, otherwise: bb5]; // scope 0 at $DIR/match-arm-scopes.rs:17:10: 17:14
+        falseEdges -> [real: bb18, imaginary: bb6]; // scope 0 at $DIR/match-arm-scopes.rs:16:25: 16:38
     }
 
     bb5: {
-        falseEdges -> [real: bb22, imaginary: bb6]; // scope 0 at $DIR/match-arm-scopes.rs:17:9: 17:21
+        switchInt((_2.0: bool)) -> [false: bb7, otherwise: bb6]; // scope 0 at $DIR/match-arm-scopes.rs:17:10: 17:14
     }
 
     bb6: {
+        falseEdges -> [real: bb26, imaginary: bb7]; // scope 0 at $DIR/match-arm-scopes.rs:17:9: 17:21
+    }
+
+    bb7: {
         StorageLive(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:32: 17:33
         _15 = (_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:17:32: 17:33
         StorageLive(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:35: 17:36
         _16 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:17:35: 17:36
-        goto -> bb21;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb25;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb7: {
+    bb8: {
         _0 = const 1i32;                 // scope 1 at $DIR/match-arm-scopes.rs:16:77: 16:78
                                          // ty::Const
                                          // + ty: i32
@@ -70,10 +74,10 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // mir::Constant
                                          // + span: $DIR/match-arm-scopes.rs:16:77: 16:78
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
-        drop(_7) -> [return: bb20, unwind: bb27]; // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        drop(_7) -> [return: bb24, unwind: bb14]; // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
     }
 
-    bb8: {
+    bb9: {
         StorageLive(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         _6 = &(_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         StorageLive(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
@@ -84,20 +88,20 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         StorageLive(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         _10 = _1;                        // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         FakeRead(ForMatchedPlace, _10);  // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
-        switchInt(_10) -> [false: bb10, otherwise: bb9]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(_10) -> [false: bb11, otherwise: bb10]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb9: {
-        falseEdges -> [real: bb11, imaginary: bb10]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+    bb10: {
+        falseEdges -> [real: bb12, imaginary: bb11]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb10: {
+    bb11: {
         _9 = (*_6);                      // scope 0 at $DIR/match-arm-scopes.rs:16:70: 16:71
         StorageDead(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
-        switchInt(move _9) -> [false: bb13, otherwise: bb12]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(move _9) -> [false: bb17, otherwise: bb16]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb11: {
+    bb12: {
         _0 = const 3i32;                 // scope 0 at $DIR/match-arm-scopes.rs:16:59: 16:60
                                          // ty::Const
                                          // + ty: i32
@@ -107,10 +111,24 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
         StorageDead(_10);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb25;                    // scope 0 at $DIR/match-arm-scopes.rs:1:1: 1:1
+        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        goto -> bb15;                    // scope 0 at $DIR/match-arm-scopes.rs:16:52: 16:60
     }
 
-    bb12: {
+    bb13: {
+        return;                          // scope 0 at $DIR/match-arm-scopes.rs:19:2: 19:2
+    }
+
+    bb14 (cleanup): {
+        drop(_2) -> bb1;                 // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    }
+
+    bb15: {
+        drop(_2) -> [return: bb13, unwind: bb1]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+    }
+
+    bb16: {
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         FakeRead(ForMatchGuard, _3);     // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         FakeRead(ForMatchGuard, _4);     // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
@@ -120,17 +138,17 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         _5 = (_2.1: bool);               // scope 0 at $DIR/match-arm-scopes.rs:16:17: 16:18
         StorageLive(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
         _7 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:16:20: 16:21
-        goto -> bb7;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb8;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb13: {
+    bb17: {
         StorageDead(_9);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        falseEdges -> [real: bb2, imaginary: bb3]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        falseEdges -> [real: bb3, imaginary: bb4]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb14: {
+    bb18: {
         StorageLive(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         _6 = &(_2.0: bool);              // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         StorageLive(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
@@ -141,20 +159,20 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         StorageLive(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         _13 = _1;                        // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
         FakeRead(ForMatchedPlace, _13);  // scope 0 at $DIR/match-arm-scopes.rs:16:45: 16:49
-        switchInt(_13) -> [false: bb16, otherwise: bb15]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(_13) -> [false: bb20, otherwise: bb19]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb15: {
-        falseEdges -> [real: bb17, imaginary: bb16]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+    bb19: {
+        falseEdges -> [real: bb21, imaginary: bb20]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb16: {
+    bb20: {
         _12 = (*_6);                     // scope 0 at $DIR/match-arm-scopes.rs:16:70: 16:71
         StorageDead(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
-        switchInt(move _12) -> [false: bb19, otherwise: bb18]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        switchInt(move _12) -> [false: bb23, otherwise: bb22]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb17: {
+    bb21: {
         _0 = const 3i32;                 // scope 0 at $DIR/match-arm-scopes.rs:16:59: 16:60
                                          // ty::Const
                                          // + ty: i32
@@ -164,10 +182,12 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
         StorageDead(_13);                // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb25;                    // scope 0 at $DIR/match-arm-scopes.rs:1:1: 1:1
+        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
+        goto -> bb15;                    // scope 0 at $DIR/match-arm-scopes.rs:16:52: 16:60
     }
 
-    bb18: {
+    bb22: {
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         FakeRead(ForMatchGuard, _3);     // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
         FakeRead(ForMatchGuard, _4);     // scope 0 at $DIR/match-arm-scopes.rs:16:72: 16:73
@@ -177,25 +197,25 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
         _5 = (_2.0: bool);               // scope 0 at $DIR/match-arm-scopes.rs:16:26: 16:27
         StorageLive(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
         _7 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:16:36: 16:37
-        goto -> bb7;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb8;                     // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb19: {
+    bb23: {
         StorageDead(_12);                // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        falseEdges -> [real: bb4, imaginary: bb5]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
+        falseEdges -> [real: bb5, imaginary: bb6]; // scope 0 at $DIR/match-arm-scopes.rs:16:42: 16:73
     }
 
-    bb20: {
+    bb24: {
         StorageDead(_7);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_5);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
         StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        goto -> bb24;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb28;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb21: {
+    bb25: {
         _0 = const 2i32;                 // scope 2 at $DIR/match-arm-scopes.rs:17:41: 17:42
                                          // ty::Const
                                          // + ty: i32
@@ -203,42 +223,24 @@ fn complicated_match(_1: bool, _2: (bool, bool, std::string::String)) -> i32 {
                                          // mir::Constant
                                          // + span: $DIR/match-arm-scopes.rs:17:41: 17:42
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
-        drop(_16) -> [return: bb23, unwind: bb27]; // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
+        drop(_16) -> [return: bb27, unwind: bb14]; // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
     }
 
-    bb22: {
+    bb26: {
         StorageLive(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:16: 17:17
         _15 = (_2.1: bool);              // scope 0 at $DIR/match-arm-scopes.rs:17:16: 17:17
         StorageLive(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:19: 17:20
         _16 = move (_2.2: std::string::String); // scope 0 at $DIR/match-arm-scopes.rs:17:19: 17:20
-        goto -> bb21;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
+        goto -> bb25;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb23: {
+    bb27: {
         StorageDead(_16);                // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
         StorageDead(_15);                // scope 0 at $DIR/match-arm-scopes.rs:17:42: 17:43
-        goto -> bb24;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
-    }
-
-    bb24: {
-        drop(_2) -> [return: bb26, unwind: bb28]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
-    }
-
-    bb25: {
-        StorageDead(_8);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        StorageDead(_6);                 // scope 0 at $DIR/match-arm-scopes.rs:16:78: 16:79
-        drop(_2) -> [return: bb26, unwind: bb28]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
-    }
-
-    bb26: {
-        return;                          // scope 0 at $DIR/match-arm-scopes.rs:19:2: 19:2
-    }
-
-    bb27 (cleanup): {
-        drop(_2) -> bb28;                // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
+        goto -> bb28;                    // scope 0 at $DIR/match-arm-scopes.rs:15:5: 18:6
     }
 
-    bb28 (cleanup): {
-        resume;                          // scope 0 at $DIR/match-arm-scopes.rs:14:1: 19:2
+    bb28: {
+        drop(_2) -> [return: bb13, unwind: bb1]; // scope 0 at $DIR/match-arm-scopes.rs:19:1: 19:2
     }
 }
diff --git a/src/test/mir-opt/match_false_edges/rustc.full_tested_match.PromoteTemps.after.mir b/src/test/mir-opt/match_false_edges/rustc.full_tested_match.PromoteTemps.after.mir
index ddb0e1b75fa..db888bc4b87 100644
--- a/src/test/mir-opt/match_false_edges/rustc.full_tested_match.PromoteTemps.after.mir
+++ b/src/test/mir-opt/match_false_edges/rustc.full_tested_match.PromoteTemps.after.mir
@@ -35,10 +35,14 @@ fn full_tested_match() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x0000002a)) }
         FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/match_false_edges.rs:15:19: 15:27
         _3 = discriminant(_2);           // scope 0 at $DIR/match_false_edges.rs:16:9: 16:16
-        switchInt(move _3) -> [0isize: bb1, 1isize: bb2, otherwise: bb4]; // scope 0 at $DIR/match_false_edges.rs:16:9: 16:16
+        switchInt(move _3) -> [0isize: bb2, 1isize: bb3, otherwise: bb5]; // scope 0 at $DIR/match_false_edges.rs:16:9: 16:16
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/match_false_edges.rs:14:1: 20:2
+    }
+
+    bb2: {
         _1 = (const 3i32, const 3i32);   // scope 0 at $DIR/match_false_edges.rs:18:17: 18:23
                                          // ty::Const
                                          // + ty: i32
@@ -52,22 +56,22 @@ fn full_tested_match() -> () {
                                          // mir::Constant
                                          // + span: $DIR/match_false_edges.rs:18:21: 18:22
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
-    }
-
-    bb2: {
-        falseEdges -> [real: bb5, imaginary: bb3]; // scope 0 at $DIR/match_false_edges.rs:16:9: 16:16
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
     }
 
     bb3: {
-        falseEdges -> [real: bb9, imaginary: bb1]; // scope 0 at $DIR/match_false_edges.rs:17:9: 17:16
+        falseEdges -> [real: bb6, imaginary: bb4]; // scope 0 at $DIR/match_false_edges.rs:16:9: 16:16
     }
 
     bb4: {
-        unreachable;                     // scope 0 at $DIR/match_false_edges.rs:15:19: 15:27
+        falseEdges -> [real: bb10, imaginary: bb2]; // scope 0 at $DIR/match_false_edges.rs:17:9: 17:16
     }
 
     bb5: {
+        unreachable;                     // scope 0 at $DIR/match_false_edges.rs:15:19: 15:27
+    }
+
+    bb6: {
         StorageLive(_6);                 // scope 0 at $DIR/match_false_edges.rs:16:14: 16:15
         _11 = const full_tested_match::promoted[0]; // scope 0 at $DIR/match_false_edges.rs:16:14: 16:15
                                          // ty::Const
@@ -79,7 +83,7 @@ fn full_tested_match() -> () {
         _6 = &(((*_11) as Some).0: i32); // scope 0 at $DIR/match_false_edges.rs:16:14: 16:15
         _4 = &shallow _2;                // scope 0 at $DIR/match_false_edges.rs:15:19: 15:27
         StorageLive(_7);                 // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
-        _7 = const guard() -> [return: bb6, unwind: bb11]; // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
+        _7 = const guard() -> [return: bb7, unwind: bb1]; // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
                                          // ty::Const
                                          // + ty: fn() -> bool {guard}
                                          // + val: Value(Scalar(<ZST>))
@@ -88,11 +92,11 @@ fn full_tested_match() -> () {
                                          // + literal: Const { ty: fn() -> bool {guard}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb6: {
-        switchInt(move _7) -> [false: bb8, otherwise: bb7]; // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
+    bb7: {
+        switchInt(move _7) -> [false: bb9, otherwise: bb8]; // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
     }
 
-    bb7: {
+    bb8: {
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:16:37: 16:38
         FakeRead(ForMatchGuard, _4);     // scope 0 at $DIR/match_false_edges.rs:16:26: 16:27
         FakeRead(ForGuardBinding, _6);   // scope 0 at $DIR/match_false_edges.rs:16:26: 16:27
@@ -110,16 +114,16 @@ fn full_tested_match() -> () {
         StorageDead(_8);                 // scope 2 at $DIR/match_false_edges.rs:16:36: 16:37
         StorageDead(_5);                 // scope 0 at $DIR/match_false_edges.rs:16:37: 16:38
         StorageDead(_6);                 // scope 0 at $DIR/match_false_edges.rs:16:37: 16:38
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
     }
 
-    bb8: {
+    bb9: {
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:16:37: 16:38
         StorageDead(_6);                 // scope 0 at $DIR/match_false_edges.rs:16:37: 16:38
-        goto -> bb3;                     // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
+        goto -> bb4;                     // scope 0 at $DIR/match_false_edges.rs:16:20: 16:27
     }
 
-    bb9: {
+    bb10: {
         StorageLive(_9);                 // scope 0 at $DIR/match_false_edges.rs:17:14: 17:15
         _9 = ((_2 as Some).0: i32);      // scope 0 at $DIR/match_false_edges.rs:17:14: 17:15
         StorageLive(_10);                // scope 3 at $DIR/match_false_edges.rs:17:24: 17:25
@@ -133,10 +137,10 @@ fn full_tested_match() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
         StorageDead(_10);                // scope 3 at $DIR/match_false_edges.rs:17:25: 17:26
         StorageDead(_9);                 // scope 0 at $DIR/match_false_edges.rs:17:26: 17:27
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:15:13: 19:6
     }
 
-    bb10: {
+    bb11: {
         StorageDead(_2);                 // scope 0 at $DIR/match_false_edges.rs:19:6: 19:7
         StorageDead(_1);                 // scope 0 at $DIR/match_false_edges.rs:19:6: 19:7
         _0 = const ();                   // scope 0 at $DIR/match_false_edges.rs:14:28: 20:2
@@ -148,8 +152,4 @@ fn full_tested_match() -> () {
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
         return;                          // scope 0 at $DIR/match_false_edges.rs:20:2: 20:2
     }
-
-    bb11 (cleanup): {
-        resume;                          // scope 0 at $DIR/match_false_edges.rs:14:1: 20:2
-    }
 }
diff --git a/src/test/mir-opt/match_false_edges/rustc.full_tested_match2.PromoteTemps.before.mir b/src/test/mir-opt/match_false_edges/rustc.full_tested_match2.PromoteTemps.before.mir
index 41687006ca3..96aa9e828d7 100644
--- a/src/test/mir-opt/match_false_edges/rustc.full_tested_match2.PromoteTemps.before.mir
+++ b/src/test/mir-opt/match_false_edges/rustc.full_tested_match2.PromoteTemps.before.mir
@@ -34,18 +34,22 @@ fn full_tested_match2() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x0000002a)) }
         FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/match_false_edges.rs:26:19: 26:27
         _3 = discriminant(_2);           // scope 0 at $DIR/match_false_edges.rs:27:9: 27:16
-        switchInt(move _3) -> [0isize: bb1, 1isize: bb2, otherwise: bb4]; // scope 0 at $DIR/match_false_edges.rs:27:9: 27:16
+        switchInt(move _3) -> [0isize: bb2, 1isize: bb3, otherwise: bb5]; // scope 0 at $DIR/match_false_edges.rs:27:9: 27:16
     }
 
-    bb1: {
-        falseEdges -> [real: bb9, imaginary: bb3]; // scope 0 at $DIR/match_false_edges.rs:28:9: 28:13
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/match_false_edges.rs:25:1: 31:2
     }
 
     bb2: {
-        falseEdges -> [real: bb5, imaginary: bb1]; // scope 0 at $DIR/match_false_edges.rs:27:9: 27:16
+        falseEdges -> [real: bb10, imaginary: bb4]; // scope 0 at $DIR/match_false_edges.rs:28:9: 28:13
     }
 
     bb3: {
+        falseEdges -> [real: bb6, imaginary: bb2]; // scope 0 at $DIR/match_false_edges.rs:27:9: 27:16
+    }
+
+    bb4: {
         StorageLive(_9);                 // scope 0 at $DIR/match_false_edges.rs:29:14: 29:15
         _9 = ((_2 as Some).0: i32);      // scope 0 at $DIR/match_false_edges.rs:29:14: 29:15
         StorageLive(_10);                // scope 3 at $DIR/match_false_edges.rs:29:24: 29:25
@@ -59,19 +63,19 @@ fn full_tested_match2() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
         StorageDead(_10);                // scope 3 at $DIR/match_false_edges.rs:29:25: 29:26
         StorageDead(_9);                 // scope 0 at $DIR/match_false_edges.rs:29:26: 29:27
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
     }
 
-    bb4: {
+    bb5: {
         unreachable;                     // scope 0 at $DIR/match_false_edges.rs:26:19: 26:27
     }
 
-    bb5: {
+    bb6: {
         StorageLive(_6);                 // scope 0 at $DIR/match_false_edges.rs:27:14: 27:15
         _6 = &((_2 as Some).0: i32);     // scope 0 at $DIR/match_false_edges.rs:27:14: 27:15
         _4 = &shallow _2;                // scope 0 at $DIR/match_false_edges.rs:26:19: 26:27
         StorageLive(_7);                 // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
-        _7 = const guard() -> [return: bb6, unwind: bb11]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
+        _7 = const guard() -> [return: bb7, unwind: bb1]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
                                          // ty::Const
                                          // + ty: fn() -> bool {guard}
                                          // + val: Value(Scalar(<ZST>))
@@ -80,11 +84,11 @@ fn full_tested_match2() -> () {
                                          // + literal: Const { ty: fn() -> bool {guard}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb6: {
-        switchInt(move _7) -> [false: bb8, otherwise: bb7]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
+    bb7: {
+        switchInt(move _7) -> [false: bb9, otherwise: bb8]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
     }
 
-    bb7: {
+    bb8: {
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:27:37: 27:38
         FakeRead(ForMatchGuard, _4);     // scope 0 at $DIR/match_false_edges.rs:27:26: 27:27
         FakeRead(ForGuardBinding, _6);   // scope 0 at $DIR/match_false_edges.rs:27:26: 27:27
@@ -102,16 +106,16 @@ fn full_tested_match2() -> () {
         StorageDead(_8);                 // scope 2 at $DIR/match_false_edges.rs:27:36: 27:37
         StorageDead(_5);                 // scope 0 at $DIR/match_false_edges.rs:27:37: 27:38
         StorageDead(_6);                 // scope 0 at $DIR/match_false_edges.rs:27:37: 27:38
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
     }
 
-    bb8: {
+    bb9: {
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:27:37: 27:38
         StorageDead(_6);                 // scope 0 at $DIR/match_false_edges.rs:27:37: 27:38
-        falseEdges -> [real: bb3, imaginary: bb1]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
+        falseEdges -> [real: bb4, imaginary: bb2]; // scope 0 at $DIR/match_false_edges.rs:27:20: 27:27
     }
 
-    bb9: {
+    bb10: {
         _1 = (const 3i32, const 3i32);   // scope 0 at $DIR/match_false_edges.rs:28:17: 28:23
                                          // ty::Const
                                          // + ty: i32
@@ -125,10 +129,10 @@ fn full_tested_match2() -> () {
                                          // mir::Constant
                                          // + span: $DIR/match_false_edges.rs:28:21: 28:22
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
-        goto -> bb10;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
+        goto -> bb11;                    // scope 0 at $DIR/match_false_edges.rs:26:13: 30:6
     }
 
-    bb10: {
+    bb11: {
         StorageDead(_2);                 // scope 0 at $DIR/match_false_edges.rs:30:6: 30:7
         StorageDead(_1);                 // scope 0 at $DIR/match_false_edges.rs:30:6: 30:7
         _0 = const ();                   // scope 0 at $DIR/match_false_edges.rs:25:29: 31:2
@@ -140,8 +144,4 @@ fn full_tested_match2() -> () {
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
         return;                          // scope 0 at $DIR/match_false_edges.rs:31:2: 31:2
     }
-
-    bb11 (cleanup): {
-        resume;                          // scope 0 at $DIR/match_false_edges.rs:25:1: 31:2
-    }
 }
diff --git a/src/test/mir-opt/match_false_edges/rustc.main.PromoteTemps.before.mir b/src/test/mir-opt/match_false_edges/rustc.main.PromoteTemps.before.mir
index 208e8e698ab..63a7c4bc43d 100644
--- a/src/test/mir-opt/match_false_edges/rustc.main.PromoteTemps.before.mir
+++ b/src/test/mir-opt/match_false_edges/rustc.main.PromoteTemps.before.mir
@@ -45,18 +45,22 @@ fn main() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
         FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/match_false_edges.rs:35:19: 35:26
         _4 = discriminant(_2);           // scope 0 at $DIR/match_false_edges.rs:36:9: 36:17
-        switchInt(move _4) -> [1isize: bb2, otherwise: bb1]; // scope 0 at $DIR/match_false_edges.rs:36:9: 36:17
+        switchInt(move _4) -> [1isize: bb3, otherwise: bb2]; // scope 0 at $DIR/match_false_edges.rs:36:9: 36:17
     }
 
-    bb1: {
-        falseEdges -> [real: bb9, imaginary: bb4]; // scope 0 at $DIR/match_false_edges.rs:37:9: 37:11
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/match_false_edges.rs:34:1: 41:2
     }
 
     bb2: {
-        falseEdges -> [real: bb5, imaginary: bb1]; // scope 0 at $DIR/match_false_edges.rs:36:9: 36:17
+        falseEdges -> [real: bb10, imaginary: bb5]; // scope 0 at $DIR/match_false_edges.rs:37:9: 37:11
     }
 
     bb3: {
+        falseEdges -> [real: bb6, imaginary: bb2]; // scope 0 at $DIR/match_false_edges.rs:36:9: 36:17
+    }
+
+    bb4: {
         StorageLive(_14);                // scope 0 at $DIR/match_false_edges.rs:39:9: 39:11
         _14 = _2;                        // scope 0 at $DIR/match_false_edges.rs:39:9: 39:11
         _1 = const 4i32;                 // scope 5 at $DIR/match_false_edges.rs:39:15: 39:16
@@ -67,19 +71,19 @@ fn main() -> () {
                                          // + span: $DIR/match_false_edges.rs:39:15: 39:16
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000004)) }
         StorageDead(_14);                // scope 0 at $DIR/match_false_edges.rs:39:16: 39:17
-        goto -> bb14;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
+        goto -> bb15;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
     }
 
-    bb4: {
-        falseEdges -> [real: bb10, imaginary: bb3]; // scope 0 at $DIR/match_false_edges.rs:38:9: 38:16
+    bb5: {
+        falseEdges -> [real: bb11, imaginary: bb4]; // scope 0 at $DIR/match_false_edges.rs:38:9: 38:16
     }
 
-    bb5: {
+    bb6: {
         StorageLive(_7);                 // scope 0 at $DIR/match_false_edges.rs:36:14: 36:16
         _7 = &((_2 as Some).0: i32);     // scope 0 at $DIR/match_false_edges.rs:36:14: 36:16
         _5 = &shallow _2;                // scope 0 at $DIR/match_false_edges.rs:35:19: 35:26
         StorageLive(_8);                 // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
-        _8 = const guard() -> [return: bb6, unwind: bb15]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
+        _8 = const guard() -> [return: bb7, unwind: bb1]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
                                          // ty::Const
                                          // + ty: fn() -> bool {guard}
                                          // + val: Value(Scalar(<ZST>))
@@ -88,11 +92,11 @@ fn main() -> () {
                                          // + literal: Const { ty: fn() -> bool {guard}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb6: {
-        switchInt(move _8) -> [false: bb8, otherwise: bb7]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
+    bb7: {
+        switchInt(move _8) -> [false: bb9, otherwise: bb8]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
     }
 
-    bb7: {
+    bb8: {
         StorageDead(_8);                 // scope 0 at $DIR/match_false_edges.rs:36:33: 36:34
         FakeRead(ForMatchGuard, _5);     // scope 0 at $DIR/match_false_edges.rs:36:27: 36:28
         FakeRead(ForGuardBinding, _7);   // scope 0 at $DIR/match_false_edges.rs:36:27: 36:28
@@ -107,16 +111,16 @@ fn main() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
         StorageDead(_6);                 // scope 0 at $DIR/match_false_edges.rs:36:33: 36:34
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:36:33: 36:34
-        goto -> bb14;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
+        goto -> bb15;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
     }
 
-    bb8: {
+    bb9: {
         StorageDead(_8);                 // scope 0 at $DIR/match_false_edges.rs:36:33: 36:34
         StorageDead(_7);                 // scope 0 at $DIR/match_false_edges.rs:36:33: 36:34
-        falseEdges -> [real: bb1, imaginary: bb1]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
+        falseEdges -> [real: bb2, imaginary: bb2]; // scope 0 at $DIR/match_false_edges.rs:36:21: 36:28
     }
 
-    bb9: {
+    bb10: {
         StorageLive(_9);                 // scope 0 at $DIR/match_false_edges.rs:37:9: 37:11
         _9 = _2;                         // scope 0 at $DIR/match_false_edges.rs:37:9: 37:11
         _1 = const 2i32;                 // scope 3 at $DIR/match_false_edges.rs:37:15: 37:16
@@ -127,17 +131,17 @@ fn main() -> () {
                                          // + span: $DIR/match_false_edges.rs:37:15: 37:16
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
         StorageDead(_9);                 // scope 0 at $DIR/match_false_edges.rs:37:16: 37:17
-        goto -> bb14;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
+        goto -> bb15;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
     }
 
-    bb10: {
+    bb11: {
         StorageLive(_11);                // scope 0 at $DIR/match_false_edges.rs:38:14: 38:15
         _11 = &((_2 as Some).0: i32);    // scope 0 at $DIR/match_false_edges.rs:38:14: 38:15
         _5 = &shallow _2;                // scope 0 at $DIR/match_false_edges.rs:35:19: 35:26
         StorageLive(_12);                // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
         StorageLive(_13);                // scope 0 at $DIR/match_false_edges.rs:38:27: 38:28
         _13 = (*_11);                    // scope 0 at $DIR/match_false_edges.rs:38:27: 38:28
-        _12 = const guard2(move _13) -> [return: bb11, unwind: bb15]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
+        _12 = const guard2(move _13) -> [return: bb12, unwind: bb1]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
                                          // ty::Const
                                          // + ty: fn(i32) -> bool {guard2}
                                          // + val: Value(Scalar(<ZST>))
@@ -146,12 +150,12 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(i32) -> bool {guard2}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb11: {
+    bb12: {
         StorageDead(_13);                // scope 0 at $DIR/match_false_edges.rs:38:28: 38:29
-        switchInt(move _12) -> [false: bb13, otherwise: bb12]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
+        switchInt(move _12) -> [false: bb14, otherwise: bb13]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
     }
 
-    bb12: {
+    bb13: {
         StorageDead(_12);                // scope 0 at $DIR/match_false_edges.rs:38:34: 38:35
         FakeRead(ForMatchGuard, _5);     // scope 0 at $DIR/match_false_edges.rs:38:28: 38:29
         FakeRead(ForGuardBinding, _11);  // scope 0 at $DIR/match_false_edges.rs:38:28: 38:29
@@ -166,16 +170,16 @@ fn main() -> () {
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000003)) }
         StorageDead(_10);                // scope 0 at $DIR/match_false_edges.rs:38:34: 38:35
         StorageDead(_11);                // scope 0 at $DIR/match_false_edges.rs:38:34: 38:35
-        goto -> bb14;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
+        goto -> bb15;                    // scope 0 at $DIR/match_false_edges.rs:35:13: 40:6
     }
 
-    bb13: {
+    bb14: {
         StorageDead(_12);                // scope 0 at $DIR/match_false_edges.rs:38:34: 38:35
         StorageDead(_11);                // scope 0 at $DIR/match_false_edges.rs:38:34: 38:35
-        falseEdges -> [real: bb3, imaginary: bb3]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
+        falseEdges -> [real: bb4, imaginary: bb4]; // scope 0 at $DIR/match_false_edges.rs:38:20: 38:29
     }
 
-    bb14: {
+    bb15: {
         StorageDead(_2);                 // scope 0 at $DIR/match_false_edges.rs:40:6: 40:7
         StorageDead(_1);                 // scope 0 at $DIR/match_false_edges.rs:40:6: 40:7
         _0 = const ();                   // scope 0 at $DIR/match_false_edges.rs:34:11: 41:2
@@ -187,8 +191,4 @@ fn main() -> () {
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
         return;                          // scope 0 at $DIR/match_false_edges.rs:41:2: 41:2
     }
-
-    bb15 (cleanup): {
-        resume;                          // scope 0 at $DIR/match_false_edges.rs:34:1: 41:2
-    }
 }
diff --git a/src/test/mir-opt/nll/region-subtyping-basic/32bit/rustc.main.nll.0.mir b/src/test/mir-opt/nll/region-subtyping-basic/32bit/rustc.main.nll.0.mir
index d6a3017d865..3e0867d9b09 100644
--- a/src/test/mir-opt/nll/region-subtyping-basic/32bit/rustc.main.nll.0.mir
+++ b/src/test/mir-opt/nll/region-subtyping-basic/32bit/rustc.main.nll.0.mir
@@ -5,21 +5,21 @@
 | '_#1r | Local | ['_#1r]
 |
 | Inferred Region Values
-| '_#0r | U0 | {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0], '_#0r, '_#1r}
-| '_#1r | U0 | {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0], '_#1r}
+| '_#0r | U0 | {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5], '_#0r, '_#1r}
+| '_#1r | U0 | {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5], '_#1r}
 | '_#2r | U0 | {}
-| '_#3r | U0 | {bb1[0..=8], bb2[0], bb4[0..=2]}
-| '_#4r | U0 | {bb1[1..=8], bb2[0], bb4[0..=2]}
-| '_#5r | U0 | {bb1[4..=8], bb2[0], bb4[0..=2]}
+| '_#3r | U0 | {bb2[0..=8], bb3[0], bb5[0..=2]}
+| '_#4r | U0 | {bb2[1..=8], bb3[0], bb5[0..=2]}
+| '_#5r | U0 | {bb2[4..=8], bb3[0], bb5[0..=2]}
 |
 | Inference Constraints
-| '_#0r live at {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0]}
-| '_#1r live at {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0]}
-| '_#3r live at {bb1[0]}
-| '_#4r live at {bb1[1..=3]}
-| '_#5r live at {bb1[4..=8], bb2[0], bb4[0..=2]}
-| '_#3r: '_#4r due to Assignment at Single(bb1[0])
-| '_#4r: '_#5r due to Assignment at Single(bb1[3])
+| '_#0r live at {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5]}
+| '_#1r live at {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5]}
+| '_#3r live at {bb2[0]}
+| '_#4r live at {bb2[1..=3]}
+| '_#5r live at {bb2[4..=8], bb3[0], bb5[0..=2]}
+| '_#3r: '_#4r due to Assignment at Single(bb2[0])
+| '_#4r: '_#5r due to Assignment at Single(bb2[3])
 |
 fn main() -> () {
     let mut _0: ();                      // return place in scope 0 at $DIR/region-subtyping-basic.rs:16:11: 16:11
@@ -76,34 +76,38 @@ fn main() -> () {
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x00000000)) }
         _4 = Len(_1);                    // bb0[6]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
         _5 = Lt(_3, _4);                 // bb0[7]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
-        assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> [success: bb1, unwind: bb8]; // bb0[8]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
+        assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> [success: bb2, unwind: bb1]; // bb0[8]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
     }
 
-    bb1: {
-        _2 = &'_#3r _1[_3];              // bb1[0]: scope 1 at $DIR/region-subtyping-basic.rs:18:13: 18:18
-        FakeRead(ForLet, _2);            // bb1[1]: scope 1 at $DIR/region-subtyping-basic.rs:18:9: 18:10
-        StorageLive(_6);                 // bb1[2]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
-        _6 = _2;                         // bb1[3]: scope 2 at $DIR/region-subtyping-basic.rs:19:13: 19:14
-        FakeRead(ForLet, _6);            // bb1[4]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
-        StorageLive(_7);                 // bb1[5]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
-        _7 = const Const(Value(Scalar(0x01)): bool); // bb1[6]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+    bb1 (cleanup): {
+        resume;                          // bb1[0]: scope 0 at $DIR/region-subtyping-basic.rs:16:1: 25:2
+    }
+
+    bb2: {
+        _2 = &'_#3r _1[_3];              // bb2[0]: scope 1 at $DIR/region-subtyping-basic.rs:18:13: 18:18
+        FakeRead(ForLet, _2);            // bb2[1]: scope 1 at $DIR/region-subtyping-basic.rs:18:9: 18:10
+        StorageLive(_6);                 // bb2[2]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
+        _6 = _2;                         // bb2[3]: scope 2 at $DIR/region-subtyping-basic.rs:19:13: 19:14
+        FakeRead(ForLet, _6);            // bb2[4]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
+        StorageLive(_7);                 // bb2[5]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+        _7 = const Const(Value(Scalar(0x01)): bool); // bb2[6]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
                                          // ty::Const
                                          // + ty: bool
                                          // + val: Value(Scalar(0x01))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:20:8: 20:12
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
-        FakeRead(ForMatchedPlace, _7);   // bb1[7]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
-        switchInt(_7) -> [Const(Value(Scalar(0x00)): bool): bb3, otherwise: bb2]; // bb1[8]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+        FakeRead(ForMatchedPlace, _7);   // bb2[7]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+        switchInt(_7) -> [Const(Value(Scalar(0x00)): bool): bb4, otherwise: bb3]; // bb2[8]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb2: {
-        falseEdges -> [real: bb4, imaginary: bb3]; // bb2[0]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+    bb3: {
+        falseEdges -> [real: bb5, imaginary: bb4]; // bb3[0]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb3: {
-        StorageLive(_10);                // bb3[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
-        _10 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(const Const(Value(Scalar(0x00000016)): usize)) -> [return: bb6, unwind: bb8]; // bb3[1]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
+    bb4: {
+        StorageLive(_10);                // bb4[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
+        _10 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(const Const(Value(Scalar(0x00000016)): usize)) -> [return: bb7, unwind: bb1]; // bb4[1]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
                                          // ty::Const
                                          // + ty: fn(usize) -> bool {use_x}
                                          // + val: Value(Scalar(<ZST>))
@@ -118,11 +122,11 @@ fn main() -> () {
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x00000016)) }
     }
 
-    bb4: {
-        StorageLive(_8);                 // bb4[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
-        StorageLive(_9);                 // bb4[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
-        _9 = (*_6);                      // bb4[2]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
-        _8 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(move _9) -> [return: bb5, unwind: bb8]; // bb4[3]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
+    bb5: {
+        StorageLive(_8);                 // bb5[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
+        StorageLive(_9);                 // bb5[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
+        _9 = (*_6);                      // bb5[2]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
+        _8 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(move _9) -> [return: bb6, unwind: bb1]; // bb5[3]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
                                          // ty::Const
                                          // + ty: fn(usize) -> bool {use_x}
                                          // + val: Value(Scalar(<ZST>))
@@ -131,41 +135,37 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(usize) -> bool {use_x}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb5: {
-        StorageDead(_9);                 // bb5[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:17: 21:18
-        StorageDead(_8);                 // bb5[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:18: 21:19
-        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb5[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:13: 22:6
+    bb6: {
+        StorageDead(_9);                 // bb6[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:17: 21:18
+        StorageDead(_8);                 // bb6[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:18: 21:19
+        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb6[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:13: 22:6
                                          // ty::Const
                                          // + ty: ()
                                          // + val: Value(Scalar(<ZST>))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:20:13: 22:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb7;                     // bb5[3]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+        goto -> bb8;                     // bb6[3]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb6: {
-        StorageDead(_10);                // bb6[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:18: 23:19
-        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb6[1]: scope 3 at $DIR/region-subtyping-basic.rs:22:12: 24:6
+    bb7: {
+        StorageDead(_10);                // bb7[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:18: 23:19
+        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb7[1]: scope 3 at $DIR/region-subtyping-basic.rs:22:12: 24:6
                                          // ty::Const
                                          // + ty: ()
                                          // + val: Value(Scalar(<ZST>))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:22:12: 24:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb7;                     // bb6[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
-    }
-
-    bb7: {
-        StorageDead(_6);                 // bb7[0]: scope 2 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_3);                 // bb7[1]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_2);                 // bb7[2]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_1);                 // bb7[3]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_7);                 // bb7[4]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        return;                          // bb7[5]: scope 0 at $DIR/region-subtyping-basic.rs:25:2: 25:2
+        goto -> bb8;                     // bb7[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb8 (cleanup): {
-        resume;                          // bb8[0]: scope 0 at $DIR/region-subtyping-basic.rs:16:1: 25:2
+    bb8: {
+        StorageDead(_6);                 // bb8[0]: scope 2 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_3);                 // bb8[1]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_2);                 // bb8[2]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_1);                 // bb8[3]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_7);                 // bb8[4]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        return;                          // bb8[5]: scope 0 at $DIR/region-subtyping-basic.rs:25:2: 25:2
     }
 }
diff --git a/src/test/mir-opt/nll/region-subtyping-basic/64bit/rustc.main.nll.0.mir b/src/test/mir-opt/nll/region-subtyping-basic/64bit/rustc.main.nll.0.mir
index 66f2850566f..61db4dba586 100644
--- a/src/test/mir-opt/nll/region-subtyping-basic/64bit/rustc.main.nll.0.mir
+++ b/src/test/mir-opt/nll/region-subtyping-basic/64bit/rustc.main.nll.0.mir
@@ -5,21 +5,21 @@
 | '_#1r | Local | ['_#1r]
 |
 | Inferred Region Values
-| '_#0r | U0 | {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0], '_#0r, '_#1r}
-| '_#1r | U0 | {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0], '_#1r}
+| '_#0r | U0 | {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5], '_#0r, '_#1r}
+| '_#1r | U0 | {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5], '_#1r}
 | '_#2r | U0 | {}
-| '_#3r | U0 | {bb1[0..=8], bb2[0], bb4[0..=2]}
-| '_#4r | U0 | {bb1[1..=8], bb2[0], bb4[0..=2]}
-| '_#5r | U0 | {bb1[4..=8], bb2[0], bb4[0..=2]}
+| '_#3r | U0 | {bb2[0..=8], bb3[0], bb5[0..=2]}
+| '_#4r | U0 | {bb2[1..=8], bb3[0], bb5[0..=2]}
+| '_#5r | U0 | {bb2[4..=8], bb3[0], bb5[0..=2]}
 |
 | Inference Constraints
-| '_#0r live at {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0]}
-| '_#1r live at {bb0[0..=8], bb1[0..=8], bb2[0], bb3[0..=1], bb4[0..=3], bb5[0..=3], bb6[0..=2], bb7[0..=5], bb8[0]}
-| '_#3r live at {bb1[0]}
-| '_#4r live at {bb1[1..=3]}
-| '_#5r live at {bb1[4..=8], bb2[0], bb4[0..=2]}
-| '_#3r: '_#4r due to Assignment at Single(bb1[0])
-| '_#4r: '_#5r due to Assignment at Single(bb1[3])
+| '_#0r live at {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5]}
+| '_#1r live at {bb0[0..=8], bb1[0], bb2[0..=8], bb3[0], bb4[0..=1], bb5[0..=3], bb6[0..=3], bb7[0..=2], bb8[0..=5]}
+| '_#3r live at {bb2[0]}
+| '_#4r live at {bb2[1..=3]}
+| '_#5r live at {bb2[4..=8], bb3[0], bb5[0..=2]}
+| '_#3r: '_#4r due to Assignment at Single(bb2[0])
+| '_#4r: '_#5r due to Assignment at Single(bb2[3])
 |
 fn main() -> () {
     let mut _0: ();                      // return place in scope 0 at $DIR/region-subtyping-basic.rs:16:11: 16:11
@@ -76,34 +76,38 @@ fn main() -> () {
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x0000000000000000)) }
         _4 = Len(_1);                    // bb0[6]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
         _5 = Lt(_3, _4);                 // bb0[7]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
-        assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> [success: bb1, unwind: bb8]; // bb0[8]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
+        assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> [success: bb2, unwind: bb1]; // bb0[8]: scope 1 at $DIR/region-subtyping-basic.rs:18:14: 18:18
     }
 
-    bb1: {
-        _2 = &'_#3r _1[_3];              // bb1[0]: scope 1 at $DIR/region-subtyping-basic.rs:18:13: 18:18
-        FakeRead(ForLet, _2);            // bb1[1]: scope 1 at $DIR/region-subtyping-basic.rs:18:9: 18:10
-        StorageLive(_6);                 // bb1[2]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
-        _6 = _2;                         // bb1[3]: scope 2 at $DIR/region-subtyping-basic.rs:19:13: 19:14
-        FakeRead(ForLet, _6);            // bb1[4]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
-        StorageLive(_7);                 // bb1[5]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
-        _7 = const Const(Value(Scalar(0x01)): bool); // bb1[6]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+    bb1 (cleanup): {
+        resume;                          // bb1[0]: scope 0 at $DIR/region-subtyping-basic.rs:16:1: 25:2
+    }
+
+    bb2: {
+        _2 = &'_#3r _1[_3];              // bb2[0]: scope 1 at $DIR/region-subtyping-basic.rs:18:13: 18:18
+        FakeRead(ForLet, _2);            // bb2[1]: scope 1 at $DIR/region-subtyping-basic.rs:18:9: 18:10
+        StorageLive(_6);                 // bb2[2]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
+        _6 = _2;                         // bb2[3]: scope 2 at $DIR/region-subtyping-basic.rs:19:13: 19:14
+        FakeRead(ForLet, _6);            // bb2[4]: scope 2 at $DIR/region-subtyping-basic.rs:19:9: 19:10
+        StorageLive(_7);                 // bb2[5]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+        _7 = const Const(Value(Scalar(0x01)): bool); // bb2[6]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
                                          // ty::Const
                                          // + ty: bool
                                          // + val: Value(Scalar(0x01))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:20:8: 20:12
                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
-        FakeRead(ForMatchedPlace, _7);   // bb1[7]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
-        switchInt(_7) -> [Const(Value(Scalar(0x00)): bool): bb3, otherwise: bb2]; // bb1[8]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+        FakeRead(ForMatchedPlace, _7);   // bb2[7]: scope 3 at $DIR/region-subtyping-basic.rs:20:8: 20:12
+        switchInt(_7) -> [Const(Value(Scalar(0x00)): bool): bb4, otherwise: bb3]; // bb2[8]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb2: {
-        falseEdges -> [real: bb4, imaginary: bb3]; // bb2[0]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+    bb3: {
+        falseEdges -> [real: bb5, imaginary: bb4]; // bb3[0]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb3: {
-        StorageLive(_10);                // bb3[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
-        _10 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(const Const(Value(Scalar(0x0000000000000016)): usize)) -> [return: bb6, unwind: bb8]; // bb3[1]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
+    bb4: {
+        StorageLive(_10);                // bb4[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
+        _10 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(const Const(Value(Scalar(0x0000000000000016)): usize)) -> [return: bb7, unwind: bb1]; // bb4[1]: scope 3 at $DIR/region-subtyping-basic.rs:23:9: 23:18
                                          // ty::Const
                                          // + ty: fn(usize) -> bool {use_x}
                                          // + val: Value(Scalar(<ZST>))
@@ -118,11 +122,11 @@ fn main() -> () {
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x0000000000000016)) }
     }
 
-    bb4: {
-        StorageLive(_8);                 // bb4[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
-        StorageLive(_9);                 // bb4[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
-        _9 = (*_6);                      // bb4[2]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
-        _8 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(move _9) -> [return: bb5, unwind: bb8]; // bb4[3]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
+    bb5: {
+        StorageLive(_8);                 // bb5[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
+        StorageLive(_9);                 // bb5[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
+        _9 = (*_6);                      // bb5[2]: scope 3 at $DIR/region-subtyping-basic.rs:21:15: 21:17
+        _8 = const Const(Value(Scalar(<ZST>)): fn(usize) -> bool {use_x})(move _9) -> [return: bb6, unwind: bb1]; // bb5[3]: scope 3 at $DIR/region-subtyping-basic.rs:21:9: 21:18
                                          // ty::Const
                                          // + ty: fn(usize) -> bool {use_x}
                                          // + val: Value(Scalar(<ZST>))
@@ -131,41 +135,37 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(usize) -> bool {use_x}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb5: {
-        StorageDead(_9);                 // bb5[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:17: 21:18
-        StorageDead(_8);                 // bb5[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:18: 21:19
-        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb5[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:13: 22:6
+    bb6: {
+        StorageDead(_9);                 // bb6[0]: scope 3 at $DIR/region-subtyping-basic.rs:21:17: 21:18
+        StorageDead(_8);                 // bb6[1]: scope 3 at $DIR/region-subtyping-basic.rs:21:18: 21:19
+        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb6[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:13: 22:6
                                          // ty::Const
                                          // + ty: ()
                                          // + val: Value(Scalar(<ZST>))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:20:13: 22:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb7;                     // bb5[3]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
+        goto -> bb8;                     // bb6[3]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb6: {
-        StorageDead(_10);                // bb6[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:18: 23:19
-        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb6[1]: scope 3 at $DIR/region-subtyping-basic.rs:22:12: 24:6
+    bb7: {
+        StorageDead(_10);                // bb7[0]: scope 3 at $DIR/region-subtyping-basic.rs:23:18: 23:19
+        _0 = const Const(Value(Scalar(<ZST>)): ()); // bb7[1]: scope 3 at $DIR/region-subtyping-basic.rs:22:12: 24:6
                                          // ty::Const
                                          // + ty: ()
                                          // + val: Value(Scalar(<ZST>))
                                          // mir::Constant
                                          // + span: $DIR/region-subtyping-basic.rs:22:12: 24:6
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        goto -> bb7;                     // bb6[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
-    }
-
-    bb7: {
-        StorageDead(_6);                 // bb7[0]: scope 2 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_3);                 // bb7[1]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_2);                 // bb7[2]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_1);                 // bb7[3]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        StorageDead(_7);                 // bb7[4]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
-        return;                          // bb7[5]: scope 0 at $DIR/region-subtyping-basic.rs:25:2: 25:2
+        goto -> bb8;                     // bb7[2]: scope 3 at $DIR/region-subtyping-basic.rs:20:5: 24:6
     }
 
-    bb8 (cleanup): {
-        resume;                          // bb8[0]: scope 0 at $DIR/region-subtyping-basic.rs:16:1: 25:2
+    bb8: {
+        StorageDead(_6);                 // bb8[0]: scope 2 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_3);                 // bb8[1]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_2);                 // bb8[2]: scope 1 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_1);                 // bb8[3]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        StorageDead(_7);                 // bb8[4]: scope 0 at $DIR/region-subtyping-basic.rs:25:1: 25:2
+        return;                          // bb8[5]: scope 0 at $DIR/region-subtyping-basic.rs:25:2: 25:2
     }
 }
diff --git a/src/test/mir-opt/no-drop-for-inactive-variant/rustc.unwrap.SimplifyCfg-elaborate-drops.after.mir b/src/test/mir-opt/no-drop-for-inactive-variant/rustc.unwrap.SimplifyCfg-elaborate-drops.after.mir
index cc8e01d2985..eb6911735a5 100644
--- a/src/test/mir-opt/no-drop-for-inactive-variant/rustc.unwrap.SimplifyCfg-elaborate-drops.after.mir
+++ b/src/test/mir-opt/no-drop-for-inactive-variant/rustc.unwrap.SimplifyCfg-elaborate-drops.after.mir
@@ -14,12 +14,16 @@ fn unwrap(_1: std::option::Option<T>) -> T {
 
     bb0: {
         _2 = discriminant(_1);           // scope 0 at $DIR/no-drop-for-inactive-variant.rs:9:9: 9:16
-        switchInt(move _2) -> [0isize: bb1, 1isize: bb3, otherwise: bb2]; // scope 0 at $DIR/no-drop-for-inactive-variant.rs:9:9: 9:16
+        switchInt(move _2) -> [0isize: bb2, 1isize: bb4, otherwise: bb3]; // scope 0 at $DIR/no-drop-for-inactive-variant.rs:9:9: 9:16
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/no-drop-for-inactive-variant.rs:7:1: 12:2
+    }
+
+    bb2: {
         StorageLive(_4);                 // scope 0 at $SRC_DIR/libstd/macros.rs:LL:COL
-        const std::rt::begin_panic::<&str>(const "explicit panic") -> bb4; // scope 0 at $SRC_DIR/libstd/macros.rs:LL:COL
+        const std::rt::begin_panic::<&str>(const "explicit panic") -> bb5; // scope 0 at $SRC_DIR/libstd/macros.rs:LL:COL
                                          // ty::Const
                                          // + ty: fn(&str) -> ! {std::rt::begin_panic::<&str>}
                                          // + val: Value(Scalar(<ZST>))
@@ -34,11 +38,11 @@ fn unwrap(_1: std::option::Option<T>) -> T {
                                          // + literal: Const { ty: &str, val: Value(Slice { data: Allocation { bytes: [101, 120, 112, 108, 105, 99, 105, 116, 32, 112, 97, 110, 105, 99], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [16383], len: Size { raw: 14 } }, size: Size { raw: 14 }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 14 }) }
     }
 
-    bb2: {
+    bb3: {
         unreachable;                     // scope 0 at $DIR/no-drop-for-inactive-variant.rs:8:11: 8:14
     }
 
-    bb3: {
+    bb4: {
         StorageLive(_3);                 // scope 0 at $DIR/no-drop-for-inactive-variant.rs:9:14: 9:15
         _3 = move ((_1 as Some).0: T);   // scope 0 at $DIR/no-drop-for-inactive-variant.rs:9:14: 9:15
         _0 = move _3;                    // scope 1 at $DIR/no-drop-for-inactive-variant.rs:9:20: 9:21
@@ -47,11 +51,7 @@ fn unwrap(_1: std::option::Option<T>) -> T {
         return;                          // scope 0 at $DIR/no-drop-for-inactive-variant.rs:12:2: 12:2
     }
 
-    bb4 (cleanup): {
-        drop(_1) -> bb5;                 // scope 0 at $DIR/no-drop-for-inactive-variant.rs:12:1: 12:2
-    }
-
     bb5 (cleanup): {
-        resume;                          // scope 0 at $DIR/no-drop-for-inactive-variant.rs:7:1: 12:2
+        drop(_1) -> bb1;                 // scope 0 at $DIR/no-drop-for-inactive-variant.rs:12:1: 12:2
     }
 }
diff --git a/src/test/mir-opt/no-spurious-drop-after-call/rustc.main.ElaborateDrops.before.mir b/src/test/mir-opt/no-spurious-drop-after-call/rustc.main.ElaborateDrops.before.mir
index 0d619af101a..0af213e425f 100644
--- a/src/test/mir-opt/no-spurious-drop-after-call/rustc.main.ElaborateDrops.before.mir
+++ b/src/test/mir-opt/no-spurious-drop-after-call/rustc.main.ElaborateDrops.before.mir
@@ -20,7 +20,7 @@ fn main() -> () {
                                          // + span: $DIR/no-spurious-drop-after-call.rs:9:20: 9:22
                                          // + literal: Const { ty: &str, val: Value(Slice { data: Allocation { bytes: [], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [], len: Size { raw: 0 } }, size: Size { raw: 0 }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 0 }) }
         _3 = &(*_4);                     // scope 0 at $DIR/no-spurious-drop-after-call.rs:9:20: 9:22
-        _2 = const <str as std::string::ToString>::to_string(move _3) -> bb1; // scope 0 at $DIR/no-spurious-drop-after-call.rs:9:20: 9:34
+        _2 = const <str as std::string::ToString>::to_string(move _3) -> bb2; // scope 0 at $DIR/no-spurious-drop-after-call.rs:9:20: 9:34
                                          // ty::Const
                                          // + ty: for<'r> fn(&'r str) -> std::string::String {<str as std::string::ToString>::to_string}
                                          // + val: Value(Scalar(<ZST>))
@@ -29,9 +29,13 @@ fn main() -> () {
                                          // + literal: Const { ty: for<'r> fn(&'r str) -> std::string::String {<str as std::string::ToString>::to_string}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/no-spurious-drop-after-call.rs:8:1: 10:2
+    }
+
+    bb2: {
         StorageDead(_3);                 // scope 0 at $DIR/no-spurious-drop-after-call.rs:9:33: 9:34
-        _1 = const std::mem::drop::<std::string::String>(move _2) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/no-spurious-drop-after-call.rs:9:5: 9:35
+        _1 = const std::mem::drop::<std::string::String>(move _2) -> [return: bb3, unwind: bb4]; // scope 0 at $DIR/no-spurious-drop-after-call.rs:9:5: 9:35
                                          // ty::Const
                                          // + ty: fn(std::string::String) {std::mem::drop::<std::string::String>}
                                          // + val: Value(Scalar(<ZST>))
@@ -40,7 +44,7 @@ fn main() -> () {
                                          // + literal: Const { ty: fn(std::string::String) {std::mem::drop::<std::string::String>}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb2: {
+    bb3: {
         StorageDead(_2);                 // scope 0 at $DIR/no-spurious-drop-after-call.rs:9:34: 9:35
         StorageDead(_4);                 // scope 0 at $DIR/no-spurious-drop-after-call.rs:9:35: 9:36
         StorageDead(_1);                 // scope 0 at $DIR/no-spurious-drop-after-call.rs:9:35: 9:36
@@ -54,11 +58,7 @@ fn main() -> () {
         return;                          // scope 0 at $DIR/no-spurious-drop-after-call.rs:10:2: 10:2
     }
 
-    bb3 (cleanup): {
-        drop(_2) -> bb4;                 // scope 0 at $DIR/no-spurious-drop-after-call.rs:9:34: 9:35
-    }
-
     bb4 (cleanup): {
-        resume;                          // scope 0 at $DIR/no-spurious-drop-after-call.rs:8:1: 10:2
+        drop(_2) -> bb1;                 // scope 0 at $DIR/no-spurious-drop-after-call.rs:9:34: 9:35
     }
 }
diff --git a/src/test/mir-opt/packed-struct-drop-aligned/32bit/rustc.main.SimplifyCfg-elaborate-drops.after.mir b/src/test/mir-opt/packed-struct-drop-aligned/32bit/rustc.main.SimplifyCfg-elaborate-drops.after.mir
index b2da77320b8..21dab9ab923 100644
--- a/src/test/mir-opt/packed-struct-drop-aligned/32bit/rustc.main.SimplifyCfg-elaborate-drops.after.mir
+++ b/src/test/mir-opt/packed-struct-drop-aligned/32bit/rustc.main.SimplifyCfg-elaborate-drops.after.mir
@@ -43,18 +43,18 @@ fn main() -> () {
         drop(_6) -> [return: bb4, unwind: bb3]; // scope 1 at $DIR/packed-struct-drop-aligned.rs:7:5: 7:8
     }
 
-    bb1: {
-        StorageDead(_1);                 // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
-        return;                          // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:2: 8:2
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/packed-struct-drop-aligned.rs:5:1: 8:2
     }
 
-    bb2 (cleanup): {
-        resume;                          // scope 0 at $DIR/packed-struct-drop-aligned.rs:5:1: 8:2
+    bb2: {
+        StorageDead(_1);                 // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
+        return;                          // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:2: 8:2
     }
 
     bb3 (cleanup): {
         (_1.0: Aligned) = move _4;       // scope 1 at $DIR/packed-struct-drop-aligned.rs:7:5: 7:8
-        drop(_1) -> bb2;                 // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
+        drop(_1) -> bb1;                 // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
     }
 
     bb4: {
@@ -68,6 +68,6 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/packed-struct-drop-aligned.rs:5:11: 8:2
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        drop(_1) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
+        drop(_1) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
     }
 }
diff --git a/src/test/mir-opt/packed-struct-drop-aligned/64bit/rustc.main.SimplifyCfg-elaborate-drops.after.mir b/src/test/mir-opt/packed-struct-drop-aligned/64bit/rustc.main.SimplifyCfg-elaborate-drops.after.mir
index b9466d88299..cf46f74c16d 100644
--- a/src/test/mir-opt/packed-struct-drop-aligned/64bit/rustc.main.SimplifyCfg-elaborate-drops.after.mir
+++ b/src/test/mir-opt/packed-struct-drop-aligned/64bit/rustc.main.SimplifyCfg-elaborate-drops.after.mir
@@ -43,18 +43,18 @@ fn main() -> () {
         drop(_6) -> [return: bb4, unwind: bb3]; // scope 1 at $DIR/packed-struct-drop-aligned.rs:7:5: 7:8
     }
 
-    bb1: {
-        StorageDead(_1);                 // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
-        return;                          // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:2: 8:2
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/packed-struct-drop-aligned.rs:5:1: 8:2
     }
 
-    bb2 (cleanup): {
-        resume;                          // scope 0 at $DIR/packed-struct-drop-aligned.rs:5:1: 8:2
+    bb2: {
+        StorageDead(_1);                 // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
+        return;                          // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:2: 8:2
     }
 
     bb3 (cleanup): {
         (_1.0: Aligned) = move _4;       // scope 1 at $DIR/packed-struct-drop-aligned.rs:7:5: 7:8
-        drop(_1) -> bb2;                 // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
+        drop(_1) -> bb1;                 // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
     }
 
     bb4: {
@@ -68,6 +68,6 @@ fn main() -> () {
                                          // mir::Constant
                                          // + span: $DIR/packed-struct-drop-aligned.rs:5:11: 8:2
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        drop(_1) -> [return: bb1, unwind: bb2]; // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
+        drop(_1) -> [return: bb2, unwind: bb1]; // scope 0 at $DIR/packed-struct-drop-aligned.rs:8:1: 8:2
     }
 }
diff --git a/src/test/mir-opt/retag/rustc.main.SimplifyCfg-elaborate-drops.after.mir b/src/test/mir-opt/retag/rustc.main.SimplifyCfg-elaborate-drops.after.mir
index 459c6b7a70a..c8c5da37abe 100644
--- a/src/test/mir-opt/retag/rustc.main.SimplifyCfg-elaborate-drops.after.mir
+++ b/src/test/mir-opt/retag/rustc.main.SimplifyCfg-elaborate-drops.after.mir
@@ -82,7 +82,7 @@ fn main() -> () {
         Retag(_7);                       // scope 1 at $DIR/retag.rs:32:29: 32:35
         _6 = &mut (*_7);                 // scope 1 at $DIR/retag.rs:32:29: 32:35
         Retag([2phase] _6);              // scope 1 at $DIR/retag.rs:32:29: 32:35
-        _3 = const Test::foo(move _4, move _6) -> [return: bb1, unwind: bb7]; // scope 1 at $DIR/retag.rs:32:17: 32:36
+        _3 = const Test::foo(move _4, move _6) -> [return: bb2, unwind: bb3]; // scope 1 at $DIR/retag.rs:32:17: 32:36
                                          // ty::Const
                                          // + ty: for<'r, 'x> fn(&'r Test, &'x mut i32) -> &'x mut i32 {Test::foo}
                                          // + val: Value(Scalar(<ZST>))
@@ -91,15 +91,23 @@ fn main() -> () {
                                          // + literal: Const { ty: for<'r, 'x> fn(&'r Test, &'x mut i32) -> &'x mut i32 {Test::foo}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/retag.rs:29:1: 51:2
+    }
+
+    bb2: {
         Retag(_3);                       // scope 1 at $DIR/retag.rs:32:17: 32:36
         StorageDead(_6);                 // scope 1 at $DIR/retag.rs:32:35: 32:36
         StorageDead(_4);                 // scope 1 at $DIR/retag.rs:32:35: 32:36
         StorageDead(_7);                 // scope 1 at $DIR/retag.rs:32:36: 32:37
-        drop(_5) -> [return: bb2, unwind: bb8]; // scope 1 at $DIR/retag.rs:32:36: 32:37
+        drop(_5) -> [return: bb4, unwind: bb1]; // scope 1 at $DIR/retag.rs:32:36: 32:37
     }
 
-    bb2: {
+    bb3 (cleanup): {
+        drop(_5) -> bb1;                 // scope 1 at $DIR/retag.rs:32:36: 32:37
+    }
+
+    bb4: {
         StorageDead(_5);                 // scope 1 at $DIR/retag.rs:32:36: 32:37
         StorageLive(_8);                 // scope 2 at $DIR/retag.rs:33:13: 33:14
         StorageLive(_9);                 // scope 2 at $DIR/retag.rs:33:19: 33:20
@@ -151,10 +159,10 @@ fn main() -> () {
         Retag(_18);                      // scope 6 at $DIR/retag.rs:44:16: 44:18
         _17 = &(*_18);                   // scope 6 at $DIR/retag.rs:44:16: 44:18
         Retag(_17);                      // scope 6 at $DIR/retag.rs:44:16: 44:18
-        _15 = move _16(move _17) -> bb3; // scope 6 at $DIR/retag.rs:44:14: 44:19
+        _15 = move _16(move _17) -> bb5; // scope 6 at $DIR/retag.rs:44:14: 44:19
     }
 
-    bb3: {
+    bb5: {
         Retag(_15);                      // scope 6 at $DIR/retag.rs:44:14: 44:19
         StorageDead(_17);                // scope 6 at $DIR/retag.rs:44:18: 44:19
         StorageDead(_16);                // scope 6 at $DIR/retag.rs:44:18: 44:19
@@ -185,7 +193,7 @@ fn main() -> () {
         Retag(_23);                      // scope 7 at $DIR/retag.rs:47:21: 47:23
         _22 = &(*_23);                   // scope 7 at $DIR/retag.rs:47:21: 47:23
         Retag(_22);                      // scope 7 at $DIR/retag.rs:47:21: 47:23
-        _19 = const Test::foo_shr(move _20, move _22) -> [return: bb4, unwind: bb6]; // scope 7 at $DIR/retag.rs:47:5: 47:24
+        _19 = const Test::foo_shr(move _20, move _22) -> [return: bb6, unwind: bb7]; // scope 7 at $DIR/retag.rs:47:5: 47:24
                                          // ty::Const
                                          // + ty: for<'r, 'x> fn(&'r Test, &'x i32) -> &'x i32 {Test::foo_shr}
                                          // + val: Value(Scalar(<ZST>))
@@ -194,15 +202,19 @@ fn main() -> () {
                                          // + literal: Const { ty: for<'r, 'x> fn(&'r Test, &'x i32) -> &'x i32 {Test::foo_shr}, val: Value(Scalar(<ZST>)) }
     }
 
-    bb4: {
+    bb6: {
         Retag(_19);                      // scope 7 at $DIR/retag.rs:47:5: 47:24
         StorageDead(_22);                // scope 7 at $DIR/retag.rs:47:23: 47:24
         StorageDead(_20);                // scope 7 at $DIR/retag.rs:47:23: 47:24
         StorageDead(_23);                // scope 7 at $DIR/retag.rs:47:24: 47:25
-        drop(_21) -> [return: bb5, unwind: bb8]; // scope 7 at $DIR/retag.rs:47:24: 47:25
+        drop(_21) -> [return: bb8, unwind: bb1]; // scope 7 at $DIR/retag.rs:47:24: 47:25
     }
 
-    bb5: {
+    bb7 (cleanup): {
+        drop(_21) -> bb1;                // scope 7 at $DIR/retag.rs:47:24: 47:25
+    }
+
+    bb8: {
         StorageDead(_21);                // scope 7 at $DIR/retag.rs:47:24: 47:25
         StorageDead(_19);                // scope 7 at $DIR/retag.rs:47:24: 47:25
         StorageLive(_25);                // scope 7 at $DIR/retag.rs:50:9: 50:11
@@ -224,16 +236,4 @@ fn main() -> () {
         StorageDead(_1);                 // scope 0 at $DIR/retag.rs:51:1: 51:2
         return;                          // scope 0 at $DIR/retag.rs:51:2: 51:2
     }
-
-    bb6 (cleanup): {
-        drop(_21) -> bb8;                // scope 7 at $DIR/retag.rs:47:24: 47:25
-    }
-
-    bb7 (cleanup): {
-        drop(_5) -> bb8;                 // scope 1 at $DIR/retag.rs:32:36: 32:37
-    }
-
-    bb8 (cleanup): {
-        resume;                          // scope 0 at $DIR/retag.rs:29:1: 51:2
-    }
 }
diff --git a/src/test/mir-opt/simple-match/32bit/rustc.match_bool.mir_map.0.mir b/src/test/mir-opt/simple-match/32bit/rustc.match_bool.mir_map.0.mir
index be4a472e9af..3a7d6a7ca3c 100644
--- a/src/test/mir-opt/simple-match/32bit/rustc.match_bool.mir_map.0.mir
+++ b/src/test/mir-opt/simple-match/32bit/rustc.match_bool.mir_map.0.mir
@@ -6,14 +6,18 @@ fn match_bool(_1: bool) -> usize {
 
     bb0: {
         FakeRead(ForMatchedPlace, _1);   // scope 0 at $DIR/simple-match.rs:6:11: 6:12
-        switchInt(_1) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/simple-match.rs:7:9: 7:13
+        switchInt(_1) -> [false: bb3, otherwise: bb2]; // scope 0 at $DIR/simple-match.rs:7:9: 7:13
     }
 
-    bb1: {
-        falseEdges -> [real: bb3, imaginary: bb2]; // scope 0 at $DIR/simple-match.rs:7:9: 7:13
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/simple-match.rs:5:1: 10:2
     }
 
     bb2: {
+        falseEdges -> [real: bb4, imaginary: bb3]; // scope 0 at $DIR/simple-match.rs:7:9: 7:13
+    }
+
+    bb3: {
         _0 = const 20usize;              // scope 0 at $DIR/simple-match.rs:8:14: 8:16
                                          // ty::Const
                                          // + ty: usize
@@ -21,10 +25,10 @@ fn match_bool(_1: bool) -> usize {
                                          // mir::Constant
                                          // + span: $DIR/simple-match.rs:8:14: 8:16
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x00000014)) }
-        goto -> bb4;                     // scope 0 at $DIR/simple-match.rs:6:5: 9:6
+        goto -> bb5;                     // scope 0 at $DIR/simple-match.rs:6:5: 9:6
     }
 
-    bb3: {
+    bb4: {
         _0 = const 10usize;              // scope 0 at $DIR/simple-match.rs:7:17: 7:19
                                          // ty::Const
                                          // + ty: usize
@@ -32,10 +36,14 @@ fn match_bool(_1: bool) -> usize {
                                          // mir::Constant
                                          // + span: $DIR/simple-match.rs:7:17: 7:19
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x0000000a)) }
-        goto -> bb4;                     // scope 0 at $DIR/simple-match.rs:6:5: 9:6
+        goto -> bb5;                     // scope 0 at $DIR/simple-match.rs:6:5: 9:6
     }
 
-    bb4: {
+    bb5: {
+        goto -> bb6;                     // scope 0 at $DIR/simple-match.rs:10:2: 10:2
+    }
+
+    bb6: {
         return;                          // scope 0 at $DIR/simple-match.rs:10:2: 10:2
     }
 }
diff --git a/src/test/mir-opt/simple-match/64bit/rustc.match_bool.mir_map.0.mir b/src/test/mir-opt/simple-match/64bit/rustc.match_bool.mir_map.0.mir
index 1dde4386ab8..170181177b2 100644
--- a/src/test/mir-opt/simple-match/64bit/rustc.match_bool.mir_map.0.mir
+++ b/src/test/mir-opt/simple-match/64bit/rustc.match_bool.mir_map.0.mir
@@ -6,14 +6,18 @@ fn match_bool(_1: bool) -> usize {
 
     bb0: {
         FakeRead(ForMatchedPlace, _1);   // scope 0 at $DIR/simple-match.rs:6:11: 6:12
-        switchInt(_1) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/simple-match.rs:7:9: 7:13
+        switchInt(_1) -> [false: bb3, otherwise: bb2]; // scope 0 at $DIR/simple-match.rs:7:9: 7:13
     }
 
-    bb1: {
-        falseEdges -> [real: bb3, imaginary: bb2]; // scope 0 at $DIR/simple-match.rs:7:9: 7:13
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/simple-match.rs:5:1: 10:2
     }
 
     bb2: {
+        falseEdges -> [real: bb4, imaginary: bb3]; // scope 0 at $DIR/simple-match.rs:7:9: 7:13
+    }
+
+    bb3: {
         _0 = const 20usize;              // scope 0 at $DIR/simple-match.rs:8:14: 8:16
                                          // ty::Const
                                          // + ty: usize
@@ -21,10 +25,10 @@ fn match_bool(_1: bool) -> usize {
                                          // mir::Constant
                                          // + span: $DIR/simple-match.rs:8:14: 8:16
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x0000000000000014)) }
-        goto -> bb4;                     // scope 0 at $DIR/simple-match.rs:6:5: 9:6
+        goto -> bb5;                     // scope 0 at $DIR/simple-match.rs:6:5: 9:6
     }
 
-    bb3: {
+    bb4: {
         _0 = const 10usize;              // scope 0 at $DIR/simple-match.rs:7:17: 7:19
                                          // ty::Const
                                          // + ty: usize
@@ -32,10 +36,14 @@ fn match_bool(_1: bool) -> usize {
                                          // mir::Constant
                                          // + span: $DIR/simple-match.rs:7:17: 7:19
                                          // + literal: Const { ty: usize, val: Value(Scalar(0x000000000000000a)) }
-        goto -> bb4;                     // scope 0 at $DIR/simple-match.rs:6:5: 9:6
+        goto -> bb5;                     // scope 0 at $DIR/simple-match.rs:6:5: 9:6
     }
 
-    bb4: {
+    bb5: {
+        goto -> bb6;                     // scope 0 at $DIR/simple-match.rs:10:2: 10:2
+    }
+
+    bb6: {
         return;                          // scope 0 at $DIR/simple-match.rs:10:2: 10:2
     }
 }
diff --git a/src/test/mir-opt/simplify-arm/rustc.id_try.SimplifyArmIdentity.diff b/src/test/mir-opt/simplify-arm/rustc.id_try.SimplifyArmIdentity.diff
index ba6e1ac24cb..64b5f174300 100644
--- a/src/test/mir-opt/simplify-arm/rustc.id_try.SimplifyArmIdentity.diff
+++ b/src/test/mir-opt/simplify-arm/rustc.id_try.SimplifyArmIdentity.diff
@@ -61,7 +61,7 @@
 -         discriminant(_0) = 0;            // scope 1 at $DIR/simplify-arm.rs:25:5: 25:10
 -         StorageDead(_11);                // scope 1 at $DIR/simplify-arm.rs:25:9: 25:10
           StorageDead(_2);                 // scope 0 at $DIR/simplify-arm.rs:26:1: 26:2
-          goto -> bb7;                     // scope 0 at $DIR/simplify-arm.rs:26:2: 26:2
+          goto -> bb5;                     // scope 0 at $DIR/simplify-arm.rs:26:2: 26:2
       }
   
       bb3: {
@@ -74,7 +74,7 @@
           StorageLive(_8);                 // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
           StorageLive(_9);                 // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
           _9 = _6;                         // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
-          _8 = const <i32 as std::convert::From<i32>>::from(move _9) -> bb5; // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
+          _8 = const <i32 as std::convert::From<i32>>::from(move _9) -> bb6; // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
                                            // ty::Const
                                            // + ty: fn(i32) -> i32 {<i32 as std::convert::From<i32>>::from}
                                            // + val: Value(Scalar(<ZST>))
@@ -84,8 +84,12 @@
       }
   
       bb5: {
+          return;                          // scope 0 at $DIR/simplify-arm.rs:26:2: 26:2
+      }
+  
+      bb6: {
           StorageDead(_9);                 // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
-          _0 = const <std::result::Result<u8, i32> as std::ops::Try>::from_error(move _8) -> bb6; // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
+          _0 = const <std::result::Result<u8, i32> as std::ops::Try>::from_error(move _8) -> bb7; // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
                                            // ty::Const
                                            // + ty: fn(<std::result::Result<u8, i32> as std::ops::Try>::Error) -> std::result::Result<u8, i32> {<std::result::Result<u8, i32> as std::ops::Try>::from_error}
                                            // + val: Value(Scalar(<ZST>))
@@ -94,16 +98,12 @@
                                            // + literal: Const { ty: fn(<std::result::Result<u8, i32> as std::ops::Try>::Error) -> std::result::Result<u8, i32> {<std::result::Result<u8, i32> as std::ops::Try>::from_error}, val: Value(Scalar(<ZST>)) }
       }
   
-      bb6: {
+      bb7: {
           StorageDead(_8);                 // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
           StorageDead(_6);                 // scope 0 at $DIR/simplify-arm.rs:24:14: 24:15
           StorageDead(_3);                 // scope 0 at $DIR/simplify-arm.rs:24:15: 24:16
           StorageDead(_2);                 // scope 0 at $DIR/simplify-arm.rs:26:1: 26:2
-          goto -> bb7;                     // scope 0 at $DIR/simplify-arm.rs:26:2: 26:2
-      }
-  
-      bb7: {
-          return;                          // scope 0 at $DIR/simplify-arm.rs:26:2: 26:2
+          goto -> bb5;                     // scope 0 at $DIR/simplify-arm.rs:24:14: 24:15
       }
   }
   
diff --git a/src/test/mir-opt/simplify-arm/rustc.id_try.SimplifyBranchSame.diff b/src/test/mir-opt/simplify-arm/rustc.id_try.SimplifyBranchSame.diff
index 4061c5e74ac..01f57bec71a 100644
--- a/src/test/mir-opt/simplify-arm/rustc.id_try.SimplifyBranchSame.diff
+++ b/src/test/mir-opt/simplify-arm/rustc.id_try.SimplifyBranchSame.diff
@@ -52,7 +52,7 @@
           _0 = move _3;                    // scope 1 at $DIR/simplify-arm.rs:25:5: 25:10
           StorageDead(_3);                 // scope 0 at $DIR/simplify-arm.rs:24:15: 24:16
           StorageDead(_2);                 // scope 0 at $DIR/simplify-arm.rs:26:1: 26:2
-          goto -> bb7;                     // scope 0 at $DIR/simplify-arm.rs:26:2: 26:2
+          goto -> bb5;                     // scope 0 at $DIR/simplify-arm.rs:26:2: 26:2
       }
   
       bb3: {
@@ -65,7 +65,7 @@
           StorageLive(_8);                 // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
           StorageLive(_9);                 // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
           _9 = _6;                         // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
-          _8 = const <i32 as std::convert::From<i32>>::from(move _9) -> bb5; // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
+          _8 = const <i32 as std::convert::From<i32>>::from(move _9) -> bb6; // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
                                            // ty::Const
                                            // + ty: fn(i32) -> i32 {<i32 as std::convert::From<i32>>::from}
                                            // + val: Value(Scalar(<ZST>))
@@ -75,8 +75,12 @@
       }
   
       bb5: {
+          return;                          // scope 0 at $DIR/simplify-arm.rs:26:2: 26:2
+      }
+  
+      bb6: {
           StorageDead(_9);                 // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
-          _0 = const <std::result::Result<u8, i32> as std::ops::Try>::from_error(move _8) -> bb6; // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
+          _0 = const <std::result::Result<u8, i32> as std::ops::Try>::from_error(move _8) -> bb7; // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
                                            // ty::Const
                                            // + ty: fn(<std::result::Result<u8, i32> as std::ops::Try>::Error) -> std::result::Result<u8, i32> {<std::result::Result<u8, i32> as std::ops::Try>::from_error}
                                            // + val: Value(Scalar(<ZST>))
@@ -85,16 +89,12 @@
                                            // + literal: Const { ty: fn(<std::result::Result<u8, i32> as std::ops::Try>::Error) -> std::result::Result<u8, i32> {<std::result::Result<u8, i32> as std::ops::Try>::from_error}, val: Value(Scalar(<ZST>)) }
       }
   
-      bb6: {
+      bb7: {
           StorageDead(_8);                 // scope 3 at $DIR/simplify-arm.rs:24:14: 24:15
           StorageDead(_6);                 // scope 0 at $DIR/simplify-arm.rs:24:14: 24:15
           StorageDead(_3);                 // scope 0 at $DIR/simplify-arm.rs:24:15: 24:16
           StorageDead(_2);                 // scope 0 at $DIR/simplify-arm.rs:26:1: 26:2
-          goto -> bb7;                     // scope 0 at $DIR/simplify-arm.rs:26:2: 26:2
-      }
-  
-      bb7: {
-          return;                          // scope 0 at $DIR/simplify-arm.rs:26:2: 26:2
+          goto -> bb5;                     // scope 0 at $DIR/simplify-arm.rs:24:14: 24:15
       }
   }
   
diff --git a/src/test/mir-opt/simplify_cfg/rustc.main.SimplifyCfg-early-opt.diff b/src/test/mir-opt/simplify_cfg/rustc.main.SimplifyCfg-early-opt.diff
index 803635bd344..3b472ed3a03 100644
--- a/src/test/mir-opt/simplify_cfg/rustc.main.SimplifyCfg-early-opt.diff
+++ b/src/test/mir-opt/simplify_cfg/rustc.main.SimplifyCfg-early-opt.diff
@@ -13,7 +13,7 @@
 - 
 -     bb1: {
           StorageLive(_2);                 // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
--         _2 = const bar() -> bb2;         // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
+-         _2 = const bar() -> bb3;         // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
 +         _2 = const bar() -> bb1;         // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
                                            // ty::Const
                                            // + ty: fn() -> bool {bar}
@@ -23,18 +23,22 @@
                                            // + literal: Const { ty: fn() -> bool {bar}, val: Value(Scalar(<ZST>)) }
       }
   
--     bb2: {
--         nop;                             // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
--         switchInt(_2) -> [false: bb4, otherwise: bb3]; // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
+-     bb2 (cleanup): {
+-         resume;                          // scope 0 at $DIR/simplify_cfg.rs:5:1: 11:2
 +     bb1: {
 +         switchInt(_2) -> [false: bb2, otherwise: bb3]; // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
       }
   
 -     bb3: {
--         goto -> bb5;                     // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
+-         nop;                             // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
+-         switchInt(_2) -> [false: bb5, otherwise: bb4]; // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
 -     }
 - 
 -     bb4: {
+-         goto -> bb6;                     // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
+-     }
+- 
+-     bb5: {
 +     bb2: {
           _1 = const ();                   // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
                                            // ty::Const
@@ -47,7 +51,7 @@
           goto -> bb0;                     // scope 0 at $DIR/simplify_cfg.rs:6:5: 10:6
       }
   
--     bb5: {
+-     bb6: {
 +     bb3: {
           _0 = const ();                   // scope 0 at $DIR/simplify_cfg.rs:8:13: 8:18
                                            // ty::Const
@@ -58,10 +62,6 @@
                                            // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
           StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:10:5: 10:6
           return;                          // scope 0 at $DIR/simplify_cfg.rs:11:2: 11:2
--     }
-- 
--     bb6 (cleanup): {
--         resume;                          // scope 0 at $DIR/simplify_cfg.rs:5:1: 11:2
       }
   }
   
diff --git a/src/test/mir-opt/simplify_cfg/rustc.main.SimplifyCfg-initial.diff b/src/test/mir-opt/simplify_cfg/rustc.main.SimplifyCfg-initial.diff
index b19b91653db..0cc2258f463 100644
--- a/src/test/mir-opt/simplify_cfg/rustc.main.SimplifyCfg-initial.diff
+++ b/src/test/mir-opt/simplify_cfg/rustc.main.SimplifyCfg-initial.diff
@@ -9,17 +9,21 @@
   
       bb0: {
 -         goto -> bb1;                     // scope 0 at $DIR/simplify_cfg.rs:6:5: 10:6
-+         falseUnwind -> [real: bb1, cleanup: bb6]; // scope 0 at $DIR/simplify_cfg.rs:6:5: 10:6
++         falseUnwind -> [real: bb1, cleanup: bb2]; // scope 0 at $DIR/simplify_cfg.rs:6:5: 10:6
       }
   
       bb1: {
--         falseUnwind -> [real: bb2, cleanup: bb11]; // scope 0 at $DIR/simplify_cfg.rs:6:5: 10:6
+-         falseUnwind -> [real: bb3, cleanup: bb4]; // scope 0 at $DIR/simplify_cfg.rs:6:5: 10:6
 -     }
 - 
 -     bb2: {
+-         goto -> bb13;                    // scope 0 at $DIR/simplify_cfg.rs:11:2: 11:2
+-     }
+- 
+-     bb3: {
           StorageLive(_2);                 // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
--         _2 = const bar() -> [return: bb3, unwind: bb11]; // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
-+         _2 = const bar() -> [return: bb2, unwind: bb6]; // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
+-         _2 = const bar() -> [return: bb5, unwind: bb4]; // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
++         _2 = const bar() -> [return: bb3, unwind: bb2]; // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
                                            // ty::Const
                                            // + ty: fn() -> bool {bar}
                                            // + val: Value(Scalar(<ZST>))
@@ -28,21 +32,26 @@
                                            // + literal: Const { ty: fn() -> bool {bar}, val: Value(Scalar(<ZST>)) }
       }
   
--     bb3: {
-+     bb2: {
-          FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
--         switchInt(_2) -> [false: bb5, otherwise: bb4]; // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
-+         switchInt(_2) -> [false: bb4, otherwise: bb3]; // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
+-     bb4 (cleanup): {
++     bb2 (cleanup): {
+          resume;                          // scope 0 at $DIR/simplify_cfg.rs:5:1: 11:2
       }
   
--     bb4: {
--         falseEdges -> [real: bb6, imaginary: bb5]; // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
+-     bb5: {
 +     bb3: {
-+         falseEdges -> [real: bb5, imaginary: bb4]; // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
+          FakeRead(ForMatchedPlace, _2);   // scope 0 at $DIR/simplify_cfg.rs:7:12: 7:17
+-         switchInt(_2) -> [false: bb7, otherwise: bb6]; // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
++         switchInt(_2) -> [false: bb5, otherwise: bb4]; // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
       }
   
--     bb5: {
+-     bb6: {
+-         falseEdges -> [real: bb8, imaginary: bb7]; // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
 +     bb4: {
++         falseEdges -> [real: bb6, imaginary: bb5]; // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
+      }
+  
+-     bb7: {
++     bb5: {
           _1 = const ();                   // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
                                            // ty::Const
                                            // + ty: ()
@@ -50,13 +59,13 @@
                                            // mir::Constant
                                            // + span: $DIR/simplify_cfg.rs:7:9: 9:10
                                            // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
--         goto -> bb9;                     // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
+-         goto -> bb12;                    // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
 +         StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:10:5: 10:6
 +         goto -> bb0;                     // scope 0 at $DIR/simplify_cfg.rs:6:5: 10:6
       }
   
--     bb6: {
-+     bb5: {
+-     bb8: {
++     bb6: {
           _0 = const ();                   // scope 0 at $DIR/simplify_cfg.rs:8:13: 8:18
                                            // ty::Const
                                            // + ty: ()
@@ -64,30 +73,29 @@
                                            // mir::Constant
                                            // + span: $DIR/simplify_cfg.rs:8:13: 8:18
                                            // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
--         goto -> bb10;                    // scope 0 at $DIR/simplify_cfg.rs:8:13: 8:18
+-         goto -> bb9;                     // scope 0 at $DIR/simplify_cfg.rs:8:13: 8:18
 -     }
 - 
--     bb7: {
+-     bb9: {
+          StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:10:5: 10:6
+-         goto -> bb2;                     // scope 0 at $DIR/simplify_cfg.rs:8:13: 8:18
+-     }
+- 
+-     bb10: {
 -         unreachable;                     // scope 0 at $DIR/simplify_cfg.rs:7:18: 9:10
 -     }
 - 
--     bb8: {
--         goto -> bb9;                     // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
+-     bb11: {
+-         goto -> bb12;                    // scope 0 at $DIR/simplify_cfg.rs:7:9: 9:10
 -     }
 - 
--     bb9: {
-          StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:10:5: 10:6
+-     bb12: {
+-         StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:10:5: 10:6
 -         goto -> bb1;                     // scope 0 at $DIR/simplify_cfg.rs:6:5: 10:6
 -     }
 - 
--     bb10: {
--         StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:10:5: 10:6
+-     bb13: {
           return;                          // scope 0 at $DIR/simplify_cfg.rs:11:2: 11:2
       }
-  
--     bb11 (cleanup): {
-+     bb6 (cleanup): {
-          resume;                          // scope 0 at $DIR/simplify_cfg.rs:5:1: 11:2
-      }
   }
   
diff --git a/src/test/mir-opt/simplify_try/rustc.try_identity.SimplifyArmIdentity.diff b/src/test/mir-opt/simplify_try/rustc.try_identity.SimplifyArmIdentity.diff
index 58c5313909f..97050122ca9 100644
--- a/src/test/mir-opt/simplify_try/rustc.try_identity.SimplifyArmIdentity.diff
+++ b/src/test/mir-opt/simplify_try/rustc.try_identity.SimplifyArmIdentity.diff
@@ -83,7 +83,7 @@
 +         _0 = move _3;                    // scope 8 at $SRC_DIR/libcore/result.rs:LL:COL
           StorageDead(_3);                 // scope 0 at $DIR/simplify_try.rs:6:15: 6:16
           StorageDead(_2);                 // scope 0 at $DIR/simplify_try.rs:8:1: 8:2
-          goto -> bb3;                     // scope 0 at $DIR/simplify_try.rs:8:2: 8:2
+          goto -> bb3;                     // scope 0 at $DIR/simplify_try.rs:6:14: 6:15
       }
   
       bb3: {
diff --git a/src/test/mir-opt/storage_live_dead_in_statics/rustc.XXX.mir_map.0.mir b/src/test/mir-opt/storage_live_dead_in_statics/rustc.XXX.mir_map.0.mir
index 8891f19e459..62b7535f2b5 100644
--- a/src/test/mir-opt/storage_live_dead_in_statics/rustc.XXX.mir_map.0.mir
+++ b/src/test/mir-opt/storage_live_dead_in_statics/rustc.XXX.mir_map.0.mir
@@ -663,4 +663,8 @@ static XXX: &Foo = {
         StorageDead(_1);                 // scope 0 at $DIR/storage_live_dead_in_statics.rs:23:1: 23:2
         return;                          // scope 0 at $DIR/storage_live_dead_in_statics.rs:5:1: 23:3
     }
+
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/storage_live_dead_in_statics.rs:5:1: 23:3
+    }
 }
diff --git a/src/test/mir-opt/uniform_array_move_out/rustc.move_out_by_subslice.mir_map.0.mir b/src/test/mir-opt/uniform_array_move_out/rustc.move_out_by_subslice.mir_map.0.mir
index d6478c628de..de29cd61019 100644
--- a/src/test/mir-opt/uniform_array_move_out/rustc.move_out_by_subslice.mir_map.0.mir
+++ b/src/test/mir-opt/uniform_array_move_out/rustc.move_out_by_subslice.mir_map.0.mir
@@ -28,10 +28,22 @@ fn move_out_by_subslice() -> () {
                                          // + span: $DIR/uniform_array_move_out.rs:11:18: 11:19
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
         _2 = move _3;                    // scope 0 at $DIR/uniform_array_move_out.rs:11:14: 11:19
-        drop(_3) -> [return: bb1, unwind: bb9]; // scope 0 at $DIR/uniform_array_move_out.rs:11:18: 11:19
+        drop(_3) -> [return: bb4, unwind: bb2]; // scope 0 at $DIR/uniform_array_move_out.rs:11:18: 11:19
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/uniform_array_move_out.rs:10:1: 13:2
+    }
+
+    bb2 (cleanup): {
+        drop(_2) -> bb1;                 // scope 0 at $DIR/uniform_array_move_out.rs:11:26: 11:27
+    }
+
+    bb3 (cleanup): {
+        drop(_3) -> bb2;                 // scope 0 at $DIR/uniform_array_move_out.rs:11:18: 11:19
+    }
+
+    bb4: {
         StorageDead(_3);                 // scope 0 at $DIR/uniform_array_move_out.rs:11:18: 11:19
         StorageLive(_4);                 // scope 0 at $DIR/uniform_array_move_out.rs:11:21: 11:26
         StorageLive(_5);                 // scope 0 at $DIR/uniform_array_move_out.rs:11:21: 11:26
@@ -44,21 +56,29 @@ fn move_out_by_subslice() -> () {
                                          // + span: $DIR/uniform_array_move_out.rs:11:25: 11:26
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
         _4 = move _5;                    // scope 0 at $DIR/uniform_array_move_out.rs:11:21: 11:26
-        drop(_5) -> [return: bb2, unwind: bb8]; // scope 0 at $DIR/uniform_array_move_out.rs:11:25: 11:26
+        drop(_5) -> [return: bb7, unwind: bb5]; // scope 0 at $DIR/uniform_array_move_out.rs:11:25: 11:26
+    }
+
+    bb5 (cleanup): {
+        drop(_4) -> bb2;                 // scope 0 at $DIR/uniform_array_move_out.rs:11:26: 11:27
+    }
+
+    bb6 (cleanup): {
+        drop(_5) -> bb5;                 // scope 0 at $DIR/uniform_array_move_out.rs:11:25: 11:26
     }
 
-    bb2: {
+    bb7: {
         StorageDead(_5);                 // scope 0 at $DIR/uniform_array_move_out.rs:11:25: 11:26
         _1 = [move _2, move _4];         // scope 0 at $DIR/uniform_array_move_out.rs:11:13: 11:27
-        drop(_4) -> [return: bb3, unwind: bb9]; // scope 0 at $DIR/uniform_array_move_out.rs:11:26: 11:27
+        drop(_4) -> [return: bb8, unwind: bb2]; // scope 0 at $DIR/uniform_array_move_out.rs:11:26: 11:27
     }
 
-    bb3: {
+    bb8: {
         StorageDead(_4);                 // scope 0 at $DIR/uniform_array_move_out.rs:11:26: 11:27
-        drop(_2) -> [return: bb4, unwind: bb10]; // scope 0 at $DIR/uniform_array_move_out.rs:11:26: 11:27
+        drop(_2) -> [return: bb9, unwind: bb1]; // scope 0 at $DIR/uniform_array_move_out.rs:11:26: 11:27
     }
 
-    bb4: {
+    bb9: {
         StorageDead(_2);                 // scope 0 at $DIR/uniform_array_move_out.rs:11:26: 11:27
         FakeRead(ForLet, _1);            // scope 0 at $DIR/uniform_array_move_out.rs:11:9: 11:10
         StorageLive(_6);                 // scope 1 at $DIR/uniform_array_move_out.rs:12:10: 12:17
@@ -70,32 +90,28 @@ fn move_out_by_subslice() -> () {
                                          // mir::Constant
                                          // + span: $DIR/uniform_array_move_out.rs:10:27: 13:2
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        drop(_6) -> [return: bb5, unwind: bb7]; // scope 1 at $DIR/uniform_array_move_out.rs:13:1: 13:2
-    }
-
-    bb5: {
-        StorageDead(_6);                 // scope 1 at $DIR/uniform_array_move_out.rs:13:1: 13:2
-        drop(_1) -> [return: bb6, unwind: bb10]; // scope 0 at $DIR/uniform_array_move_out.rs:13:1: 13:2
+        drop(_6) -> [return: bb12, unwind: bb10]; // scope 1 at $DIR/uniform_array_move_out.rs:13:1: 13:2
     }
 
-    bb6: {
-        StorageDead(_1);                 // scope 0 at $DIR/uniform_array_move_out.rs:13:1: 13:2
-        return;                          // scope 0 at $DIR/uniform_array_move_out.rs:13:2: 13:2
+    bb10 (cleanup): {
+        drop(_1) -> bb1;                 // scope 0 at $DIR/uniform_array_move_out.rs:13:1: 13:2
     }
 
-    bb7 (cleanup): {
-        drop(_1) -> bb10;                // scope 0 at $DIR/uniform_array_move_out.rs:13:1: 13:2
+    bb11 (cleanup): {
+        drop(_6) -> bb10;                // scope 1 at $DIR/uniform_array_move_out.rs:13:1: 13:2
     }
 
-    bb8 (cleanup): {
-        drop(_4) -> bb9;                 // scope 0 at $DIR/uniform_array_move_out.rs:11:26: 11:27
+    bb12: {
+        StorageDead(_6);                 // scope 1 at $DIR/uniform_array_move_out.rs:13:1: 13:2
+        drop(_1) -> [return: bb13, unwind: bb1]; // scope 0 at $DIR/uniform_array_move_out.rs:13:1: 13:2
     }
 
-    bb9 (cleanup): {
-        drop(_2) -> bb10;                // scope 0 at $DIR/uniform_array_move_out.rs:11:26: 11:27
+    bb13: {
+        StorageDead(_1);                 // scope 0 at $DIR/uniform_array_move_out.rs:13:1: 13:2
+        goto -> bb14;                    // scope 0 at $DIR/uniform_array_move_out.rs:13:2: 13:2
     }
 
-    bb10 (cleanup): {
-        resume;                          // scope 0 at $DIR/uniform_array_move_out.rs:10:1: 13:2
+    bb14: {
+        return;                          // scope 0 at $DIR/uniform_array_move_out.rs:13:2: 13:2
     }
 }
diff --git a/src/test/mir-opt/uniform_array_move_out/rustc.move_out_from_end.mir_map.0.mir b/src/test/mir-opt/uniform_array_move_out/rustc.move_out_from_end.mir_map.0.mir
index bba616de9a6..aeab0e892ae 100644
--- a/src/test/mir-opt/uniform_array_move_out/rustc.move_out_from_end.mir_map.0.mir
+++ b/src/test/mir-opt/uniform_array_move_out/rustc.move_out_from_end.mir_map.0.mir
@@ -28,10 +28,22 @@ fn move_out_from_end() -> () {
                                          // + span: $DIR/uniform_array_move_out.rs:5:18: 5:19
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000001)) }
         _2 = move _3;                    // scope 0 at $DIR/uniform_array_move_out.rs:5:14: 5:19
-        drop(_3) -> [return: bb1, unwind: bb9]; // scope 0 at $DIR/uniform_array_move_out.rs:5:18: 5:19
+        drop(_3) -> [return: bb4, unwind: bb2]; // scope 0 at $DIR/uniform_array_move_out.rs:5:18: 5:19
     }
 
-    bb1: {
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/uniform_array_move_out.rs:4:1: 7:2
+    }
+
+    bb2 (cleanup): {
+        drop(_2) -> bb1;                 // scope 0 at $DIR/uniform_array_move_out.rs:5:26: 5:27
+    }
+
+    bb3 (cleanup): {
+        drop(_3) -> bb2;                 // scope 0 at $DIR/uniform_array_move_out.rs:5:18: 5:19
+    }
+
+    bb4: {
         StorageDead(_3);                 // scope 0 at $DIR/uniform_array_move_out.rs:5:18: 5:19
         StorageLive(_4);                 // scope 0 at $DIR/uniform_array_move_out.rs:5:21: 5:26
         StorageLive(_5);                 // scope 0 at $DIR/uniform_array_move_out.rs:5:21: 5:26
@@ -44,21 +56,29 @@ fn move_out_from_end() -> () {
                                          // + span: $DIR/uniform_array_move_out.rs:5:25: 5:26
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
         _4 = move _5;                    // scope 0 at $DIR/uniform_array_move_out.rs:5:21: 5:26
-        drop(_5) -> [return: bb2, unwind: bb8]; // scope 0 at $DIR/uniform_array_move_out.rs:5:25: 5:26
+        drop(_5) -> [return: bb7, unwind: bb5]; // scope 0 at $DIR/uniform_array_move_out.rs:5:25: 5:26
+    }
+
+    bb5 (cleanup): {
+        drop(_4) -> bb2;                 // scope 0 at $DIR/uniform_array_move_out.rs:5:26: 5:27
+    }
+
+    bb6 (cleanup): {
+        drop(_5) -> bb5;                 // scope 0 at $DIR/uniform_array_move_out.rs:5:25: 5:26
     }
 
-    bb2: {
+    bb7: {
         StorageDead(_5);                 // scope 0 at $DIR/uniform_array_move_out.rs:5:25: 5:26
         _1 = [move _2, move _4];         // scope 0 at $DIR/uniform_array_move_out.rs:5:13: 5:27
-        drop(_4) -> [return: bb3, unwind: bb9]; // scope 0 at $DIR/uniform_array_move_out.rs:5:26: 5:27
+        drop(_4) -> [return: bb8, unwind: bb2]; // scope 0 at $DIR/uniform_array_move_out.rs:5:26: 5:27
     }
 
-    bb3: {
+    bb8: {
         StorageDead(_4);                 // scope 0 at $DIR/uniform_array_move_out.rs:5:26: 5:27
-        drop(_2) -> [return: bb4, unwind: bb10]; // scope 0 at $DIR/uniform_array_move_out.rs:5:26: 5:27
+        drop(_2) -> [return: bb9, unwind: bb1]; // scope 0 at $DIR/uniform_array_move_out.rs:5:26: 5:27
     }
 
-    bb4: {
+    bb9: {
         StorageDead(_2);                 // scope 0 at $DIR/uniform_array_move_out.rs:5:26: 5:27
         FakeRead(ForLet, _1);            // scope 0 at $DIR/uniform_array_move_out.rs:5:9: 5:10
         StorageLive(_6);                 // scope 1 at $DIR/uniform_array_move_out.rs:6:14: 6:16
@@ -70,32 +90,28 @@ fn move_out_from_end() -> () {
                                          // mir::Constant
                                          // + span: $DIR/uniform_array_move_out.rs:4:24: 7:2
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-        drop(_6) -> [return: bb5, unwind: bb7]; // scope 1 at $DIR/uniform_array_move_out.rs:7:1: 7:2
-    }
-
-    bb5: {
-        StorageDead(_6);                 // scope 1 at $DIR/uniform_array_move_out.rs:7:1: 7:2
-        drop(_1) -> [return: bb6, unwind: bb10]; // scope 0 at $DIR/uniform_array_move_out.rs:7:1: 7:2
+        drop(_6) -> [return: bb12, unwind: bb10]; // scope 1 at $DIR/uniform_array_move_out.rs:7:1: 7:2
     }
 
-    bb6: {
-        StorageDead(_1);                 // scope 0 at $DIR/uniform_array_move_out.rs:7:1: 7:2
-        return;                          // scope 0 at $DIR/uniform_array_move_out.rs:7:2: 7:2
+    bb10 (cleanup): {
+        drop(_1) -> bb1;                 // scope 0 at $DIR/uniform_array_move_out.rs:7:1: 7:2
     }
 
-    bb7 (cleanup): {
-        drop(_1) -> bb10;                // scope 0 at $DIR/uniform_array_move_out.rs:7:1: 7:2
+    bb11 (cleanup): {
+        drop(_6) -> bb10;                // scope 1 at $DIR/uniform_array_move_out.rs:7:1: 7:2
     }
 
-    bb8 (cleanup): {
-        drop(_4) -> bb9;                 // scope 0 at $DIR/uniform_array_move_out.rs:5:26: 5:27
+    bb12: {
+        StorageDead(_6);                 // scope 1 at $DIR/uniform_array_move_out.rs:7:1: 7:2
+        drop(_1) -> [return: bb13, unwind: bb1]; // scope 0 at $DIR/uniform_array_move_out.rs:7:1: 7:2
     }
 
-    bb9 (cleanup): {
-        drop(_2) -> bb10;                // scope 0 at $DIR/uniform_array_move_out.rs:5:26: 5:27
+    bb13: {
+        StorageDead(_1);                 // scope 0 at $DIR/uniform_array_move_out.rs:7:1: 7:2
+        goto -> bb14;                    // scope 0 at $DIR/uniform_array_move_out.rs:7:2: 7:2
     }
 
-    bb10 (cleanup): {
-        resume;                          // scope 0 at $DIR/uniform_array_move_out.rs:4:1: 7:2
+    bb14: {
+        return;                          // scope 0 at $DIR/uniform_array_move_out.rs:7:2: 7:2
     }
 }
diff --git a/src/test/mir-opt/unusual-item-types/32bit/rustc.E-V-{{constant}}.mir_map.0.mir b/src/test/mir-opt/unusual-item-types/32bit/rustc.E-V-{{constant}}.mir_map.0.mir
index b17f379f4b6..c800ccb1ae5 100644
--- a/src/test/mir-opt/unusual-item-types/32bit/rustc.E-V-{{constant}}.mir_map.0.mir
+++ b/src/test/mir-opt/unusual-item-types/32bit/rustc.E-V-{{constant}}.mir_map.0.mir
@@ -13,4 +13,8 @@ E::V::{{constant}}#0: isize = {
                                          // + literal: Const { ty: isize, val: Value(Scalar(0x00000005)) }
         return;                          // scope 0 at $DIR/unusual-item-types.rs:22:9: 22:10
     }
+
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/unusual-item-types.rs:22:9: 22:10
+    }
 }
diff --git a/src/test/mir-opt/unusual-item-types/32bit/rustc.ptr-drop_in_place.std__vec__Vec_i32_.AddMovesForPackedDrops.before.mir b/src/test/mir-opt/unusual-item-types/32bit/rustc.ptr-drop_in_place.std__vec__Vec_i32_.AddMovesForPackedDrops.before.mir
index d56d15062d2..28f14399a63 100644
--- a/src/test/mir-opt/unusual-item-types/32bit/rustc.ptr-drop_in_place.std__vec__Vec_i32_.AddMovesForPackedDrops.before.mir
+++ b/src/test/mir-opt/unusual-item-types/32bit/rustc.ptr-drop_in_place.std__vec__Vec_i32_.AddMovesForPackedDrops.before.mir
@@ -6,7 +6,7 @@ fn std::intrinsics::drop_in_place(_1: *mut std::vec::Vec<i32>) -> () {
     let mut _3: ();                      // in scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
 
     bb0: {
-        goto -> bb6;                     // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
+        goto -> bb7;                     // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
     }
 
     bb1: {
@@ -22,16 +22,20 @@ fn std::intrinsics::drop_in_place(_1: *mut std::vec::Vec<i32>) -> () {
     }
 
     bb4 (cleanup): {
-        drop(((*_1).0: alloc::raw_vec::RawVec<i32>)) -> bb2; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
+        goto -> bb2;                     // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
     }
 
-    bb5: {
-        drop(((*_1).0: alloc::raw_vec::RawVec<i32>)) -> [return: bb3, unwind: bb2]; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
+    bb5 (cleanup): {
+        drop(((*_1).0: alloc::raw_vec::RawVec<i32>)) -> bb4; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
     }
 
     bb6: {
+        drop(((*_1).0: alloc::raw_vec::RawVec<i32>)) -> [return: bb3, unwind: bb4]; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
+    }
+
+    bb7: {
         _2 = &mut (*_1);                 // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
-        _3 = const <std::vec::Vec<i32> as std::ops::Drop>::drop(move _2) -> [return: bb5, unwind: bb4]; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
+        _3 = const <std::vec::Vec<i32> as std::ops::Drop>::drop(move _2) -> [return: bb6, unwind: bb5]; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
                                          // ty::Const
                                          // + ty: for<'r> fn(&'r mut std::vec::Vec<i32>) {<std::vec::Vec<i32> as std::ops::Drop>::drop}
                                          // + val: Value(Scalar(<ZST>))
diff --git a/src/test/mir-opt/unusual-item-types/32bit/rustc.{{impl}}-ASSOCIATED_CONSTANT.mir_map.0.mir b/src/test/mir-opt/unusual-item-types/32bit/rustc.{{impl}}-ASSOCIATED_CONSTANT.mir_map.0.mir
index 7349307f94c..f4a5cc0b327 100644
--- a/src/test/mir-opt/unusual-item-types/32bit/rustc.{{impl}}-ASSOCIATED_CONSTANT.mir_map.0.mir
+++ b/src/test/mir-opt/unusual-item-types/32bit/rustc.{{impl}}-ASSOCIATED_CONSTANT.mir_map.0.mir
@@ -13,4 +13,8 @@ const <impl at $DIR/unusual-item-types.rs:9:1: 11:2>::ASSOCIATED_CONSTANT: i32 =
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
         return;                          // scope 0 at $DIR/unusual-item-types.rs:10:5: 10:40
     }
+
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/unusual-item-types.rs:10:5: 10:40
+    }
 }
diff --git a/src/test/mir-opt/unusual-item-types/64bit/rustc.E-V-{{constant}}.mir_map.0.mir b/src/test/mir-opt/unusual-item-types/64bit/rustc.E-V-{{constant}}.mir_map.0.mir
index 12073d612a1..e635cd2b01b 100644
--- a/src/test/mir-opt/unusual-item-types/64bit/rustc.E-V-{{constant}}.mir_map.0.mir
+++ b/src/test/mir-opt/unusual-item-types/64bit/rustc.E-V-{{constant}}.mir_map.0.mir
@@ -13,4 +13,8 @@ E::V::{{constant}}#0: isize = {
                                          // + literal: Const { ty: isize, val: Value(Scalar(0x0000000000000005)) }
         return;                          // scope 0 at $DIR/unusual-item-types.rs:22:9: 22:10
     }
+
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/unusual-item-types.rs:22:9: 22:10
+    }
 }
diff --git a/src/test/mir-opt/unusual-item-types/64bit/rustc.ptr-drop_in_place.std__vec__Vec_i32_.AddMovesForPackedDrops.before.mir b/src/test/mir-opt/unusual-item-types/64bit/rustc.ptr-drop_in_place.std__vec__Vec_i32_.AddMovesForPackedDrops.before.mir
index d56d15062d2..28f14399a63 100644
--- a/src/test/mir-opt/unusual-item-types/64bit/rustc.ptr-drop_in_place.std__vec__Vec_i32_.AddMovesForPackedDrops.before.mir
+++ b/src/test/mir-opt/unusual-item-types/64bit/rustc.ptr-drop_in_place.std__vec__Vec_i32_.AddMovesForPackedDrops.before.mir
@@ -6,7 +6,7 @@ fn std::intrinsics::drop_in_place(_1: *mut std::vec::Vec<i32>) -> () {
     let mut _3: ();                      // in scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
 
     bb0: {
-        goto -> bb6;                     // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
+        goto -> bb7;                     // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
     }
 
     bb1: {
@@ -22,16 +22,20 @@ fn std::intrinsics::drop_in_place(_1: *mut std::vec::Vec<i32>) -> () {
     }
 
     bb4 (cleanup): {
-        drop(((*_1).0: alloc::raw_vec::RawVec<i32>)) -> bb2; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
+        goto -> bb2;                     // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
     }
 
-    bb5: {
-        drop(((*_1).0: alloc::raw_vec::RawVec<i32>)) -> [return: bb3, unwind: bb2]; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
+    bb5 (cleanup): {
+        drop(((*_1).0: alloc::raw_vec::RawVec<i32>)) -> bb4; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
     }
 
     bb6: {
+        drop(((*_1).0: alloc::raw_vec::RawVec<i32>)) -> [return: bb3, unwind: bb4]; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
+    }
+
+    bb7: {
         _2 = &mut (*_1);                 // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
-        _3 = const <std::vec::Vec<i32> as std::ops::Drop>::drop(move _2) -> [return: bb5, unwind: bb4]; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
+        _3 = const <std::vec::Vec<i32> as std::ops::Drop>::drop(move _2) -> [return: bb6, unwind: bb5]; // scope 0 at $SRC_DIR/libcore/ptr/mod.rs:LL:COL
                                          // ty::Const
                                          // + ty: for<'r> fn(&'r mut std::vec::Vec<i32>) {<std::vec::Vec<i32> as std::ops::Drop>::drop}
                                          // + val: Value(Scalar(<ZST>))
diff --git a/src/test/mir-opt/unusual-item-types/64bit/rustc.{{impl}}-ASSOCIATED_CONSTANT.mir_map.0.mir b/src/test/mir-opt/unusual-item-types/64bit/rustc.{{impl}}-ASSOCIATED_CONSTANT.mir_map.0.mir
index 7349307f94c..f4a5cc0b327 100644
--- a/src/test/mir-opt/unusual-item-types/64bit/rustc.{{impl}}-ASSOCIATED_CONSTANT.mir_map.0.mir
+++ b/src/test/mir-opt/unusual-item-types/64bit/rustc.{{impl}}-ASSOCIATED_CONSTANT.mir_map.0.mir
@@ -13,4 +13,8 @@ const <impl at $DIR/unusual-item-types.rs:9:1: 11:2>::ASSOCIATED_CONSTANT: i32 =
                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000002)) }
         return;                          // scope 0 at $DIR/unusual-item-types.rs:10:5: 10:40
     }
+
+    bb1 (cleanup): {
+        resume;                          // scope 0 at $DIR/unusual-item-types.rs:10:5: 10:40
+    }
 }
diff --git a/src/test/mir-opt/while-storage/rustc.while_loop.PreCodegen.after.mir b/src/test/mir-opt/while-storage/rustc.while_loop.PreCodegen.after.mir
index 4742a0fb631..3ddf82c2fb2 100644
--- a/src/test/mir-opt/while-storage/rustc.while_loop.PreCodegen.after.mir
+++ b/src/test/mir-opt/while-storage/rustc.while_loop.PreCodegen.after.mir
@@ -70,7 +70,7 @@ fn while_loop(_1: bool) -> () {
                                          // + span: $DIR/while-storage.rs:12:13: 12:18
                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
         StorageDead(_4);                 // scope 0 at $DIR/while-storage.rs:14:5: 14:6
-        goto -> bb7;                     // scope 0 at $DIR/while-storage.rs:1:1: 1:1
+        goto -> bb7;                     // scope 0 at $DIR/while-storage.rs:12:13: 12:18
     }
 
     bb7: {