Record whether a Call in MIR corresponds to a call in HIR

17 files changed, 58 insertions, 17 deletions

diff --git a/src/librustc/ich/impls_mir.rs b/src/librustc/ich/impls_mir.rs
index ec54613d1db..656f5795e18 100644
--- a/src/librustc/ich/impls_mir.rs
+++ b/src/librustc/ich/impls_mir.rs
@@ -194,11 +194,13 @@ for mir::TerminatorKind<'gcx> {
             mir::TerminatorKind::Call { ref func,
                                         ref args,
                                         ref destination,
-                                        cleanup } => {
+                                        cleanup,
+                                        from_hir_call, } => {
                 func.hash_stable(hcx, hasher);
                 args.hash_stable(hcx, hasher);
                 destination.hash_stable(hcx, hasher);
                 cleanup.hash_stable(hcx, hasher);
+                from_hir_call.hash_stable(hcx, hasher);
             }
             mir::TerminatorKind::Assert { ref cond,
                                           expected,
diff --git a/src/librustc/mir/mod.rs b/src/librustc/mir/mod.rs
index 27ef01b93cd..98d81bd639e 100644
--- a/src/librustc/mir/mod.rs
+++ b/src/librustc/mir/mod.rs
@@ -1049,6 +1049,9 @@ pub enum TerminatorKind<'tcx> {
         destination: Option<(Place<'tcx>, BasicBlock)>,
         /// Cleanups to be done if the call unwinds.
         cleanup: Option<BasicBlock>,
+        /// Whether this is from a call in HIR, rather than from an overloaded
+        /// operator. True for overloaded function call.
+        from_hir_call: bool,
     },
 
     /// Jump to the target if the condition has the expected value,
@@ -2810,6 +2813,7 @@ impl<'tcx> TypeFoldable<'tcx> for Terminator<'tcx> {
                 ref args,
                 ref destination,
                 cleanup,
+                from_hir_call,
             } => {
                 let dest = destination
                     .as_ref()
@@ -2820,6 +2824,7 @@ impl<'tcx> TypeFoldable<'tcx> for Terminator<'tcx> {
                     args: args.fold_with(folder),
                     destination: dest,
                     cleanup,
+                    from_hir_call,
                 }
             }
             Assert {
diff --git a/src/librustc/mir/visit.rs b/src/librustc/mir/visit.rs
index 6de7e2215bf..cbfbed90c90 100644
--- a/src/librustc/mir/visit.rs
+++ b/src/librustc/mir/visit.rs
@@ -468,7 +468,8 @@ macro_rules! make_mir_visitor {
                     TerminatorKind::Call { ref $($mutability)* func,
                                            ref $($mutability)* args,
                                            ref $($mutability)* destination,
-                                           cleanup } => {
+                                           cleanup,
+                                           from_hir_call: _, } => {
                         self.visit_operand(func, source_location);
                         for arg in args {
                             self.visit_operand(arg, source_location);
diff --git a/src/librustc_codegen_llvm/mir/block.rs b/src/librustc_codegen_llvm/mir/block.rs
index 709fceb4925..db95b46c38e 100644
--- a/src/librustc_codegen_llvm/mir/block.rs
+++ b/src/librustc_codegen_llvm/mir/block.rs
@@ -412,7 +412,13 @@ impl FunctionCx<'a, 'll, 'tcx> {
                 bug!("undesugared DropAndReplace in codegen: {:?}", terminator);
             }
 
-            mir::TerminatorKind::Call { ref func, ref args, ref destination, cleanup } => {
+            mir::TerminatorKind::Call {
+                ref func,
+                ref args,
+                ref destination,
+                cleanup,
+                from_hir_call: _
+            } => {
                 // Create the callee. This is a fn ptr or zero-sized and hence a kind of scalar.
                 let callee = self.codegen_operand(&bx, func);
 
diff --git a/src/librustc_mir/borrow_check/mod.rs b/src/librustc_mir/borrow_check/mod.rs
index 6ecbc5ee727..103cb3b2a31 100644
--- a/src/librustc_mir/borrow_check/mod.rs
+++ b/src/librustc_mir/borrow_check/mod.rs
@@ -667,6 +667,7 @@ impl<'cx, 'gcx, 'tcx> DataflowResultsConsumer<'cx, 'tcx> for MirBorrowckCtxt<'cx
                 ref args,
                 ref destination,
                 cleanup: _,
+                from_hir_call: _,
             } => {
                 self.consume_operand(ContextKind::CallOperator.new(loc), (func, span), flow_state);
                 for arg in args {
diff --git a/src/librustc_mir/borrow_check/nll/invalidation.rs b/src/librustc_mir/borrow_check/nll/invalidation.rs
index f19c102adcf..a9b5531bae5 100644
--- a/src/librustc_mir/borrow_check/nll/invalidation.rs
+++ b/src/librustc_mir/borrow_check/nll/invalidation.rs
@@ -203,6 +203,7 @@ impl<'cx, 'tcx, 'gcx> Visitor<'tcx> for InvalidationGenerator<'cx, 'tcx, 'gcx> {
                 ref args,
                 ref destination,
                 cleanup: _,
+                from_hir_call: _,
             } => {
                 self.consume_operand(ContextKind::CallOperator.new(location), func);
                 for arg in args {
diff --git a/src/librustc_mir/build/expr/into.rs b/src/librustc_mir/build/expr/into.rs
index 5708ac4e6b5..c9dfbc2f00f 100644
--- a/src/librustc_mir/build/expr/into.rs
+++ b/src/librustc_mir/build/expr/into.rs
@@ -264,7 +264,7 @@ impl<'a, 'gcx, 'tcx> Builder<'a, 'gcx, 'tcx> {
                 );
                 exit_block.unit()
             }
-            ExprKind::Call { ty, fun, args } => {
+            ExprKind::Call { ty, fun, args, from_hir_call } => {
                 // FIXME(canndrew): This is_never should probably be an is_uninhabited
                 let diverges = expr.ty.is_never();
                 let intrinsic = match ty.sty {
@@ -326,6 +326,7 @@ impl<'a, 'gcx, 'tcx> Builder<'a, 'gcx, 'tcx> {
                             } else {
                                 Some((destination.clone(), success))
                             },
+                            from_hir_call,
                         },
                     );
                     success.unit()
diff --git a/src/librustc_mir/build/matches/test.rs b/src/librustc_mir/build/matches/test.rs
index caef3ef80db..a8713286f18 100644
--- a/src/librustc_mir/build/matches/test.rs
+++ b/src/librustc_mir/build/matches/test.rs
@@ -361,6 +361,7 @@ impl<'a, 'gcx, 'tcx> Builder<'a, 'gcx, 'tcx> {
                         args: vec![val, expect],
                         destination: Some((eq_result.clone(), eq_block)),
                         cleanup: Some(cleanup),
+                        from_hir_call: false,
                     });
 
                     // check the result
diff --git a/src/librustc_mir/dataflow/mod.rs b/src/librustc_mir/dataflow/mod.rs
index 1e362e6f0dc..da4bd780eb4 100644
--- a/src/librustc_mir/dataflow/mod.rs
+++ b/src/librustc_mir/dataflow/mod.rs
@@ -795,7 +795,7 @@ impl<'a, 'tcx: 'a, D> DataflowAnalysis<'a, 'tcx, D> where D: BitDenotation
                     self.propagate_bits_into_entry_set_for(in_out, *target, dirty_list);
                 }
             }
-            mir::TerminatorKind::Call { cleanup, ref destination, func: _, args: _ } => {
+            mir::TerminatorKind::Call { cleanup, ref destination, .. } => {
                 if let Some(unwind) = cleanup {
                     if !self.dead_unwinds.contains(bb) {
                         self.propagate_bits_into_entry_set_for(in_out, unwind, dirty_list);
diff --git a/src/librustc_mir/dataflow/move_paths/builder.rs b/src/librustc_mir/dataflow/move_paths/builder.rs
index 2884b15ca47..32b11870116 100644
--- a/src/librustc_mir/dataflow/move_paths/builder.rs
+++ b/src/librustc_mir/dataflow/move_paths/builder.rs
@@ -380,7 +380,13 @@ impl<'b, 'a, 'gcx, 'tcx> Gatherer<'b, 'a, 'gcx, 'tcx> {
                 self.gather_operand(value);
                 self.gather_init(location, InitKind::Deep);
             }
-            TerminatorKind::Call { ref func, ref args, ref destination, cleanup: _ } => {
+            TerminatorKind::Call {
+                ref func,
+                ref args,
+                ref destination,
+                cleanup: _,
+                from_hir_call: _,
+            } => {
                 self.gather_operand(func);
                 for arg in args {
                     self.gather_operand(arg);
diff --git a/src/librustc_mir/hair/cx/expr.rs b/src/librustc_mir/hair/cx/expr.rs
index 3183f0f47ea..aff091ccc54 100644
--- a/src/librustc_mir/hair/cx/expr.rs
+++ b/src/librustc_mir/hair/cx/expr.rs
@@ -21,6 +21,7 @@ use rustc::ty::cast::CastKind as TyCastKind;
 use rustc::hir;
 use rustc::hir::def_id::LocalDefId;
 use rustc::mir::{BorrowKind};
+use syntax_pos::Span;
 
 impl<'tcx> Mirror<'tcx> for &'tcx hir::Expr {
     type Output = Expr<'tcx>;
@@ -232,9 +233,9 @@ fn make_mirror_unadjusted<'a, 'gcx, 'tcx>(cx: &mut Cx<'a, 'gcx, 'tcx>,
 
     let kind = match expr.node {
         // Here comes the interesting stuff:
-        hir::ExprKind::MethodCall(.., ref args) => {
+        hir::ExprKind::MethodCall(_, method_span, ref args) => {
             // Rewrite a.b(c) into UFCS form like Trait::b(a, c)
-            let expr = method_callee(cx, expr, None);
+            let expr = method_callee(cx, expr, method_span,None);
             let args = args.iter()
                 .map(|e| e.to_ref())
                 .collect();
@@ -242,6 +243,7 @@ fn make_mirror_unadjusted<'a, 'gcx, 'tcx>(cx: &mut Cx<'a, 'gcx, 'tcx>,
                 ty: expr.ty,
                 fun: expr.to_ref(),
                 args,
+                from_hir_call: true,
             }
         }
 
@@ -254,7 +256,7 @@ fn make_mirror_unadjusted<'a, 'gcx, 'tcx>(cx: &mut Cx<'a, 'gcx, 'tcx>,
 
                 // rewrite f(u, v) into FnOnce::call_once(f, (u, v))
 
-                let method = method_callee(cx, expr, None);
+                let method = method_callee(cx, expr, fun.span,None);
 
                 let arg_tys = args.iter().map(|e| cx.tables().expr_ty_adjusted(e));
                 let tupled_args = Expr {
@@ -268,6 +270,7 @@ fn make_mirror_unadjusted<'a, 'gcx, 'tcx>(cx: &mut Cx<'a, 'gcx, 'tcx>,
                     ty: method.ty,
                     fun: method.to_ref(),
                     args: vec![fun.to_ref(), tupled_args.to_ref()],
+                    from_hir_call: true,
                 }
             } else {
                 let adt_data = if let hir::ExprKind::Path(hir::QPath::Resolved(_, ref path)) =
@@ -321,6 +324,7 @@ fn make_mirror_unadjusted<'a, 'gcx, 'tcx>(cx: &mut Cx<'a, 'gcx, 'tcx>,
                         ty: cx.tables().node_id_to_type(fun.hir_id),
                         fun: fun.to_ref(),
                         args: args.to_ref(),
+                        from_hir_call: true,
                     }
                 }
             }
@@ -812,6 +816,7 @@ fn user_annotated_ty_for_adt(
 fn method_callee<'a, 'gcx, 'tcx>(
     cx: &mut Cx<'a, 'gcx, 'tcx>,
     expr: &hir::Expr,
+    span: Span,
     overloaded_callee: Option<(DefId, &'tcx Substs<'tcx>)>,
 ) -> Expr<'tcx> {
     let temp_lifetime = cx.region_scope_tree.temporary_scope(expr.hir_id.local_id);
@@ -832,7 +837,7 @@ fn method_callee<'a, 'gcx, 'tcx>(
     Expr {
         temp_lifetime,
         ty,
-        span: expr.span,
+        span,
         kind: ExprKind::Literal {
             literal: ty::Const::zero_sized(cx.tcx(), ty),
             user_ty,
@@ -1093,11 +1098,12 @@ fn overloaded_operator<'a, 'gcx, 'tcx>(cx: &mut Cx<'a, 'gcx, 'tcx>,
                                        expr: &'tcx hir::Expr,
                                        args: Vec<ExprRef<'tcx>>)
                                        -> ExprKind<'tcx> {
-    let fun = method_callee(cx, expr, None);
+    let fun = method_callee(cx, expr, expr.span, None);
     ExprKind::Call {
         ty: fun.ty,
         fun: fun.to_ref(),
         args,
+        from_hir_call: false,
     }
 }
 
@@ -1132,7 +1138,7 @@ fn overloaded_place<'a, 'gcx, 'tcx>(
     // construct the complete expression `foo()` for the overloaded call,
     // which will yield the &T type
     let temp_lifetime = cx.region_scope_tree.temporary_scope(expr.hir_id.local_id);
-    let fun = method_callee(cx, expr, overloaded_callee);
+    let fun = method_callee(cx, expr, expr.span, overloaded_callee);
     let ref_expr = Expr {
         temp_lifetime,
         ty: ref_ty,
@@ -1141,6 +1147,7 @@ fn overloaded_place<'a, 'gcx, 'tcx>(
             ty: fun.ty,
             fun: fun.to_ref(),
             args,
+            from_hir_call: false,
         },
     };
 
diff --git a/src/librustc_mir/hair/mod.rs b/src/librustc_mir/hair/mod.rs
index d86aee54312..818c4f6b9cf 100644
--- a/src/librustc_mir/hair/mod.rs
+++ b/src/librustc_mir/hair/mod.rs
@@ -150,6 +150,9 @@ pub enum ExprKind<'tcx> {
         ty: Ty<'tcx>,
         fun: ExprRef<'tcx>,
         args: Vec<ExprRef<'tcx>>,
+        // Whether this is from a call in HIR, rather than from an overloaded
+        // operator. True for overloaded function call.
+        from_hir_call: bool,
     },
     Deref {
         arg: ExprRef<'tcx>,
diff --git a/src/librustc_mir/shim.rs b/src/librustc_mir/shim.rs
index 7ba72366af7..6c3dd0ea3cc 100644
--- a/src/librustc_mir/shim.rs
+++ b/src/librustc_mir/shim.rs
@@ -468,6 +468,7 @@ impl<'a, 'tcx> CloneShimBuilder<'a, 'tcx> {
             args: vec![Operand::Move(ref_loc)],
             destination: Some((dest, next)),
             cleanup: Some(cleanup),
+            from_hir_call: true,
         }, false);
     }
 
@@ -766,7 +767,8 @@ fn build_call_shim<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
             Some(BasicBlock::new(3))
         } else {
             None
-        }
+        },
+        from_hir_call: true,
     }, false);
 
     if let Adjustment::RefMut = rcvr_adjustment {
diff --git a/src/librustc_mir/transform/lower_128bit.rs b/src/librustc_mir/transform/lower_128bit.rs
index b2ddbe04d75..bd7d9d36761 100644
--- a/src/librustc_mir/transform/lower_128bit.rs
+++ b/src/librustc_mir/transform/lower_128bit.rs
@@ -121,6 +121,7 @@ impl Lower128Bit {
                             args: vec![lhs, rhs],
                             destination: Some((place, bb)),
                             cleanup: None,
+                            from_hir_call: false,
                         },
                     });
             }
diff --git a/src/librustc_mir/transform/promote_consts.rs b/src/librustc_mir/transform/promote_consts.rs
index 34339b06341..f4efe33da70 100644
--- a/src/librustc_mir/transform/promote_consts.rs
+++ b/src/librustc_mir/transform/promote_consts.rs
@@ -258,7 +258,7 @@ impl<'a, 'tcx> Promoter<'a, 'tcx> {
             };
 
             match terminator.kind {
-                TerminatorKind::Call { mut func, mut args, .. } => {
+                TerminatorKind::Call { mut func, mut args, from_hir_call, .. } => {
                     self.visit_operand(&mut func, loc);
                     for arg in &mut args {
                         self.visit_operand(arg, loc);
@@ -272,7 +272,8 @@ impl<'a, 'tcx> Promoter<'a, 'tcx> {
                             func,
                             args,
                             cleanup: None,
-                            destination: Some((Place::Local(new_temp), new_target))
+                            destination: Some((Place::Local(new_temp), new_target)),
+                            from_hir_call,
                         },
                         ..terminator
                     };
diff --git a/src/librustc_mir/transform/qualify_min_const_fn.rs b/src/librustc_mir/transform/qualify_min_const_fn.rs
index 98420115d75..aa559c96ec6 100644
--- a/src/librustc_mir/transform/qualify_min_const_fn.rs
+++ b/src/librustc_mir/transform/qualify_min_const_fn.rs
@@ -318,6 +318,7 @@ fn check_terminator(
         TerminatorKind::Call {
             func,
             args,
+            from_hir_call: _,
             destination: _,
             cleanup: _,
         } => {
diff --git a/src/librustc_mir/util/elaborate_drops.rs b/src/librustc_mir/util/elaborate_drops.rs
index 9b8165181cc..1dca367ffdf 100644
--- a/src/librustc_mir/util/elaborate_drops.rs
+++ b/src/librustc_mir/util/elaborate_drops.rs
@@ -545,8 +545,9 @@ impl<'l, 'b, 'tcx, D> DropCtxt<'l, 'b, 'tcx, D>
                     args: vec![Operand::Move(Place::Local(ref_place))],
                     destination: Some((unit_temp, succ)),
                     cleanup: unwind.into_option(),
+                    from_hir_call: true,
                 },
-                source_info: self.source_info
+                source_info: self.source_info,
             }),
             is_cleanup: unwind.is_cleanup(),
         };
@@ -903,7 +904,8 @@ impl<'l, 'b, 'tcx, D> DropCtxt<'l, 'b, 'tcx, D>
             func: Operand::function_handle(tcx, free_func, substs, self.source_info.span),
             args: args,
             destination: Some((unit_temp, target)),
-            cleanup: None
+            cleanup: None,
+            from_hir_call: false,
         }; // FIXME(#43234)
         let free_block = self.new_block(unwind, call);