Tools, tests, and experimenting with MIR-derived coverage counters

Adds a new mir_dump output file in HTML/CSS to visualize code regions
and the MIR features that they came from (including overlapping spans).
See example below:

Includes a basic, MIR-block-based implementation of coverage injection,
available via `-Zexperimental-coverage`. This implementation has known
flaws and omissions, but is simple enough to validate the new tools and
tests.

The existing `-Zinstrument-coverage` option currently enables
function-level coverage only, which at least appears to generate
accurate coverage reports at that level.

Experimental coverage is not accurate at this time. When branch coverage
works as intended, the `-Zexperimental-coverage` option should be
removed.

This PR replaces the bulk of PR #75828, with the remaining parts of
that PR distributed among other separate and indentpent PRs.

This PR depends on three of those other PRs: #76000, #76002, and

Rust compiler MCP rust-lang/compiler-team#278

Relevant issue: #34701 - Implement support for LLVMs code coverage
instrumentation

![Screen-Recording-2020-08-21-at-2](https://user-images.githubusercontent.com/3827298/90972923-ff417880-e4d1-11ea-92bb-8713c6198f6d.gif)

28 files changed, 2072 insertions, 299 deletions

diff --git a/compiler/rustc_middle/src/mir/mod.rs b/compiler/rustc_middle/src/mir/mod.rs
index 785a7f0c51a..453bc6ea6c7 100644
--- a/compiler/rustc_middle/src/mir/mod.rs
+++ b/compiler/rustc_middle/src/mir/mod.rs
@@ -1530,7 +1530,24 @@ impl Debug for Statement<'_> {
             AscribeUserType(box (ref place, ref c_ty), ref variance) => {
                 write!(fmt, "AscribeUserType({:?}, {:?}, {:?})", place, variance, c_ty)
             }
-            Coverage(box ref coverage) => write!(fmt, "{:?}", coverage),
+            Coverage(box ref coverage) => {
+                let rgn = &coverage.code_region;
+                match coverage.kind {
+                    CoverageKind::Counter { id, .. } => {
+                        write!(fmt, "Coverage::Counter({:?}) for {:?}", id.index(), rgn)
+                    }
+                    CoverageKind::Expression { id, lhs, op, rhs } => write!(
+                        fmt,
+                        "Coverage::Expression({:?}) = {} {} {} for {:?}",
+                        id.index(),
+                        lhs.index(),
+                        if op == coverage::Op::Add { "+" } else { "-" },
+                        rhs.index(),
+                        rgn
+                    ),
+                    CoverageKind::Unreachable => write!(fmt, "Coverage::Unreachable for {:?}", rgn),
+                }
+            }
             Nop => write!(fmt, "nop"),
         }
     }
diff --git a/compiler/rustc_mir/src/transform/instrument_coverage.rs b/compiler/rustc_mir/src/transform/instrument_coverage.rs
index f60e6da714a..d3a2bd24123 100644
--- a/compiler/rustc_mir/src/transform/instrument_coverage.rs
+++ b/compiler/rustc_mir/src/transform/instrument_coverage.rs
@@ -1,23 +1,34 @@
 use crate::transform::{MirPass, MirSource};
+use crate::util::pretty;
+use crate::util::spanview::{
+    source_range_no_file, statement_kind_name, terminator_kind_name, write_spanview_document,
+    SpanViewable, TOOLTIP_INDENT,
+};
+
 use rustc_data_structures::fingerprint::Fingerprint;
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
+use rustc_index::bit_set::BitSet;
 use rustc_middle::hir;
 use rustc_middle::ich::StableHashingContext;
 use rustc_middle::mir;
 use rustc_middle::mir::coverage::*;
 use rustc_middle::mir::visit::Visitor;
-use rustc_middle::mir::{BasicBlock, Coverage, CoverageInfo, Location, Statement, StatementKind};
+use rustc_middle::mir::{
+    BasicBlock, BasicBlockData, Coverage, CoverageInfo, Location, Statement, StatementKind,
+    TerminatorKind,
+};
 use rustc_middle::ty::query::Providers;
 use rustc_middle::ty::TyCtxt;
 use rustc_span::def_id::DefId;
 use rustc_span::{FileName, Pos, RealFileName, Span, Symbol};
 
-/// Inserts call to count_code_region() as a placeholder to be replaced during code generation with
-/// the intrinsic llvm.instrprof.increment.
+/// Inserts `StatementKind::Coverage` statements that either instrument the binary with injected
+/// counters, via intrinsic `llvm.instrprof.increment`, and/or inject metadata used during codegen
+/// to construct the coverage map.
 pub struct InstrumentCoverage;
 
-/// The `query` provider for `CoverageInfo`, requested by `codegen_intrinsic_call()` when
-/// constructing the arguments for `llvm.instrprof.increment`.
+/// The `query` provider for `CoverageInfo`, requested by `codegen_coverage()` (to inject each
+/// counter) and `FunctionCoverage::new()` (to extract the coverage map metadata from the MIR).
 pub(crate) fn provide(providers: &mut Providers) {
     providers.coverageinfo = |tcx, def_id| coverageinfo_from_mir(tcx, def_id);
 }
@@ -43,8 +54,8 @@ impl Visitor<'_> for CoverageVisitor {
     }
 }
 
-fn coverageinfo_from_mir<'tcx>(tcx: TyCtxt<'tcx>, mir_def_id: DefId) -> CoverageInfo {
-    let mir_body = tcx.optimized_mir(mir_def_id);
+fn coverageinfo_from_mir<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> CoverageInfo {
+    let mir_body = tcx.optimized_mir(def_id);
 
     // The `num_counters` argument to `llvm.instrprof.increment` is the number of injected
     // counters, with each counter having a counter ID from `0..num_counters-1`. MIR optimization
@@ -63,18 +74,30 @@ fn coverageinfo_from_mir<'tcx>(tcx: TyCtxt<'tcx>, mir_def_id: DefId) -> Coverage
 }
 
 impl<'tcx> MirPass<'tcx> for InstrumentCoverage {
-    fn run_pass(&self, tcx: TyCtxt<'tcx>, src: MirSource<'tcx>, mir_body: &mut mir::Body<'tcx>) {
+    fn run_pass(
+        &self,
+        tcx: TyCtxt<'tcx>,
+        mir_source: MirSource<'tcx>,
+        mir_body: &mut mir::Body<'tcx>,
+    ) {
         // If the InstrumentCoverage pass is called on promoted MIRs, skip them.
         // See: https://github.com/rust-lang/rust/pull/73011#discussion_r438317601
-        if src.promoted.is_none() {
-            Instrumentor::new(tcx, src, mir_body).inject_counters();
+        if mir_source.promoted.is_none() {
+            Instrumentor::new(&self.name(), tcx, mir_source, mir_body).inject_counters();
         }
     }
 }
 
+#[derive(Clone)]
+struct CoverageRegion {
+    pub span: Span,
+    pub blocks: Vec<BasicBlock>,
+}
+
 struct Instrumentor<'a, 'tcx> {
+    pass_name: &'a str,
     tcx: TyCtxt<'tcx>,
-    mir_def_id: DefId,
+    mir_source: MirSource<'tcx>,
     mir_body: &'a mut mir::Body<'tcx>,
     hir_body: &'tcx rustc_hir::Body<'tcx>,
     function_source_hash: Option<u64>,
@@ -83,12 +106,17 @@ struct Instrumentor<'a, 'tcx> {
 }
 
 impl<'a, 'tcx> Instrumentor<'a, 'tcx> {
-    fn new(tcx: TyCtxt<'tcx>, src: MirSource<'tcx>, mir_body: &'a mut mir::Body<'tcx>) -> Self {
-        let mir_def_id = src.def_id();
-        let hir_body = hir_body(tcx, mir_def_id);
+    fn new(
+        pass_name: &'a str,
+        tcx: TyCtxt<'tcx>,
+        mir_source: MirSource<'tcx>,
+        mir_body: &'a mut mir::Body<'tcx>,
+    ) -> Self {
+        let hir_body = hir_body(tcx, mir_source.def_id());
         Self {
+            pass_name,
             tcx,
-            mir_def_id,
+            mir_source,
             mir_body,
             hir_body,
             function_source_hash: None,
@@ -127,19 +155,100 @@ impl<'a, 'tcx> Instrumentor<'a, 'tcx> {
     }
 
     fn inject_counters(&mut self) {
+        let tcx = self.tcx;
+        let def_id = self.mir_source.def_id();
+        let mir_body = &self.mir_body;
         let body_span = self.hir_body.value.span;
-        debug!("instrumenting {:?}, span: {:?}", self.mir_def_id, body_span);
-
-        // FIXME(richkadel): As a first step, counters are only injected at the top of each
-        // function. The complete solution will inject counters at each conditional code branch.
-        let block = rustc_middle::mir::START_BLOCK;
-        let counter = self.make_counter();
-        self.inject_statement(counter, body_span, block);
-
-        // FIXME(richkadel): The next step to implement source based coverage analysis will be
-        // instrumenting branches within functions, and some regions will be counted by "counter
-        // expression". The function to inject counter expression is implemented. Replace this
-        // "fake use" with real use.
+        debug!(
+            "instrumenting {:?}, span: {}",
+            def_id,
+            tcx.sess.source_map().span_to_string(body_span)
+        );
+
+        if !tcx.sess.opts.debugging_opts.experimental_coverage {
+            // Coverage at the function level should be accurate. This is the default implementation
+            // if `-Z experimental-coverage` is *NOT* enabled.
+            let block = rustc_middle::mir::START_BLOCK;
+            let counter = self.make_counter();
+            self.inject_statement(counter, body_span, block);
+            return;
+        }
+        // FIXME(richkadel): else if `-Z experimental-coverage` *IS* enabled: Efforts are still in
+        // progress to identify the correct code region spans and associated counters to generate
+        // accurate Rust coverage reports.
+
+        let block_span = |data: &BasicBlockData<'tcx>| {
+            // The default span will be the `Terminator` span; but until we have a smarter solution,
+            // the coverage region also incorporates at least the statements in this BasicBlock as
+            // well. Extend the span to encompass all, if possible.
+            // FIXME(richkadel): Assuming the terminator's span is already known to be contained in `body_span`.
+            let mut span = data.terminator().source_info.span;
+            // FIXME(richkadel): It's looking unlikely that we should compute a span from MIR
+            // spans, but if we do keep something like this logic, we will need a smarter way
+            // to combine `Statement`s and/or `Terminator`s with `Span`s from different
+            // files.
+            for statement_span in data.statements.iter().map(|statement| statement.source_info.span)
+            {
+                // Only combine Spans from the function's body_span.
+                if body_span.contains(statement_span) {
+                    span = span.to(statement_span);
+                }
+            }
+            span
+        };
+
+        // Traverse the CFG but ignore anything following an `unwind`
+        let cfg_without_unwind = ShortCircuitPreorder::new(mir_body, |term_kind| {
+            let mut successors = term_kind.successors();
+            match &term_kind {
+                // SwitchInt successors are never unwind, and all of them should be traversed
+                TerminatorKind::SwitchInt { .. } => successors,
+                // For all other kinds, return only the first successor, if any, and ignore unwinds
+                _ => successors.next().into_iter().chain(&[]),
+            }
+        });
+
+        let mut coverage_regions = Vec::with_capacity(cfg_without_unwind.size_hint().0);
+        for (bb, data) in cfg_without_unwind {
+            if !body_span.contains(data.terminator().source_info.span) {
+                continue;
+            }
+
+            // FIXME(richkadel): Regions will soon contain multiple blocks.
+            let mut blocks = Vec::new();
+            blocks.push(bb);
+            let span = block_span(data);
+            coverage_regions.push(CoverageRegion { span, blocks });
+        }
+
+        let span_viewables = if pretty::dump_enabled(tcx, self.pass_name, def_id) {
+            Some(self.span_viewables(&coverage_regions))
+        } else {
+            None
+        };
+
+        // Inject counters for the selected spans
+        for CoverageRegion { span, blocks } in coverage_regions {
+            debug!(
+                "Injecting counter at: {:?}:\n{}\n==========",
+                span,
+                tcx.sess.source_map().span_to_snippet(span).expect("Error getting source for span"),
+            );
+            let counter = self.make_counter();
+            self.inject_statement(counter, span, blocks[0]);
+        }
+
+        if let Some(span_viewables) = span_viewables {
+            let mut file =
+                pretty::create_dump_file(tcx, "html", None, self.pass_name, &0, self.mir_source)
+                    .expect("Unexpected error creating MIR spanview HTML file");
+            write_spanview_document(tcx, def_id, span_viewables, &mut file)
+                .expect("Unexpected IO error dumping coverage spans as HTML");
+        }
+
+        // FIXME(richkadel): Some regions will be counted by "counter expression". Counter
+        // expressions are supported, but are not yet generated. When they are, remove this `fake_use`
+        // block.
         let fake_use = false;
         if fake_use {
             let add = false;
@@ -193,6 +302,83 @@ impl<'a, 'tcx> Instrumentor<'a, 'tcx> {
         };
         data.statements.push(statement);
     }
+
+    /// Converts the computed `CoverageRegion`s into `SpanViewable`s.
+    fn span_viewables(&self, coverage_regions: &Vec<CoverageRegion>) -> Vec<SpanViewable> {
+        let mut span_viewables = Vec::new();
+        for coverage_region in coverage_regions {
+            span_viewables.push(SpanViewable {
+                span: coverage_region.span,
+                title: format!("{}", coverage_region.blocks[0].index()),
+                tooltip: self.make_tooltip_text(coverage_region),
+            });
+        }
+        span_viewables
+    }
+
+    /// A custom tooltip renderer used in a spanview HTML+CSS document used for coverage analysis.
+    fn make_tooltip_text(&self, coverage_region: &CoverageRegion) -> String {
+        const INCLUDE_COVERAGE_STATEMENTS: bool = false;
+        let tcx = self.tcx;
+        let source_map = tcx.sess.source_map();
+        let mut text = Vec::new();
+        for (i, &bb) in coverage_region.blocks.iter().enumerate() {
+            if i > 0 {
+                text.push("\n".to_owned());
+            }
+            text.push(format!("{:?}: {}:", bb, &source_map.span_to_string(coverage_region.span)));
+            let data = &self.mir_body.basic_blocks()[bb];
+            for statement in &data.statements {
+                let statement_string = match statement.kind {
+                    StatementKind::Coverage(box ref coverage) => match coverage.kind {
+                        CoverageKind::Counter { id, .. } => {
+                            if !INCLUDE_COVERAGE_STATEMENTS {
+                                continue;
+                            }
+                            format!("increment counter #{}", id.index())
+                        }
+                        CoverageKind::Expression { id, lhs, op, rhs } => {
+                            if !INCLUDE_COVERAGE_STATEMENTS {
+                                continue;
+                            }
+                            format!(
+                                "expression #{} = {} {} {}",
+                                id.index(),
+                                lhs.index(),
+                                if op == Op::Add { "+" } else { "-" },
+                                rhs.index()
+                            )
+                        }
+                        CoverageKind::Unreachable => {
+                            if !INCLUDE_COVERAGE_STATEMENTS {
+                                continue;
+                            }
+                            format!("unreachable")
+                        }
+                    },
+                    _ => format!("{:?}", statement),
+                };
+                let source_range = source_range_no_file(tcx, &statement.source_info.span);
+                text.push(format!(
+                    "\n{}{}: {}: {}",
+                    TOOLTIP_INDENT,
+                    source_range,
+                    statement_kind_name(statement),
+                    statement_string
+                ));
+            }
+            let term = data.terminator();
+            let source_range = source_range_no_file(tcx, &term.source_info.span);
+            text.push(format!(
+                "\n{}{}: {}: {:?}",
+                TOOLTIP_INDENT,
+                source_range,
+                terminator_kind_name(term),
+                term.kind
+            ));
+        }
+        text.join("")
+    }
 }
 
 /// Convert the Span into its file name, start line and column, and end line and column
@@ -227,7 +413,7 @@ fn make_code_region<'tcx>(tcx: TyCtxt<'tcx>, span: &Span) -> CodeRegion {
 }
 
 fn hir_body<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> &'tcx rustc_hir::Body<'tcx> {
-    let hir_node = tcx.hir().get_if_local(def_id).expect("DefId is local");
+    let hir_node = tcx.hir().get_if_local(def_id).expect("expected DefId is local");
     let fn_body_id = hir::map::associated_body(hir_node).expect("HIR node is a function with body");
     tcx.hir().body(fn_body_id)
 }
@@ -245,3 +431,61 @@ fn hash(
     node.hash_stable(hcx, &mut stable_hasher);
     stable_hasher.finish()
 }
+
+pub struct ShortCircuitPreorder<
+    'a,
+    'tcx,
+    F: Fn(&'tcx TerminatorKind<'tcx>) -> mir::Successors<'tcx>,
+> {
+    body: &'a mir::Body<'tcx>,
+    visited: BitSet<BasicBlock>,
+    worklist: Vec<BasicBlock>,
+    filtered_successors: F,
+}
+
+impl<'a, 'tcx, F: Fn(&'tcx TerminatorKind<'tcx>) -> mir::Successors<'tcx>>
+    ShortCircuitPreorder<'a, 'tcx, F>
+{
+    pub fn new(
+        body: &'a mir::Body<'tcx>,
+        filtered_successors: F,
+    ) -> ShortCircuitPreorder<'a, 'tcx, F> {
+        let worklist = vec![mir::START_BLOCK];
+
+        ShortCircuitPreorder {
+            body,
+            visited: BitSet::new_empty(body.basic_blocks().len()),
+            worklist,
+            filtered_successors,
+        }
+    }
+}
+
+impl<'a: 'tcx, 'tcx, F: Fn(&'tcx TerminatorKind<'tcx>) -> mir::Successors<'tcx>> Iterator
+    for ShortCircuitPreorder<'a, 'tcx, F>
+{
+    type Item = (BasicBlock, &'a BasicBlockData<'tcx>);
+
+    fn next(&mut self) -> Option<(BasicBlock, &'a BasicBlockData<'tcx>)> {
+        while let Some(idx) = self.worklist.pop() {
+            if !self.visited.insert(idx) {
+                continue;
+            }
+
+            let data = &self.body[idx];
+
+            if let Some(ref term) = data.terminator {
+                self.worklist.extend((self.filtered_successors)(&term.kind));
+            }
+
+            return Some((idx, data));
+        }
+
+        None
+    }
+
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        let size = self.body.basic_blocks().len() - self.visited.count();
+        (size, Some(size))
+    }
+}
diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index 6861314a88f..7db2557453b 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -1724,6 +1724,10 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
         );
     }
 
+    if debugging_opts.experimental_coverage {
+        debugging_opts.instrument_coverage = true;
+    }
+
     if debugging_opts.instrument_coverage {
         if cg.profile_generate.enabled() || cg.profile_use.is_some() {
             early_error(
diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs
index a28c17917df..44a18bd7831 100644
--- a/compiler/rustc_session/src/options.rs
+++ b/compiler/rustc_session/src/options.rs
@@ -890,6 +890,11 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
         all statements)."),
     emit_stack_sizes: bool = (false, parse_bool, [UNTRACKED],
         "emit a section containing stack size metadata (default: no)"),
+    experimental_coverage: bool = (false, parse_bool, [TRACKED],
+        "enable and extend the `-Z instrument-coverage` function-level coverage \
+        feature, adding additional experimental (likely inaccurate) counters and \
+        code regions (used by `rustc` compiler developers to test new coverage \
+        counter placements) (default: no)"),
     fewer_names: bool = (false, parse_bool, [TRACKED],
         "reduce memory use by retaining fewer names within compilation artifacts (LLVM-IR) \
         (default: no)"),
diff --git a/src/test/mir-opt/instrument_coverage.bar.InstrumentCoverage.diff b/src/test/mir-opt/instrument_coverage.bar.InstrumentCoverage.diff
index 01d837d155a..5b2572655cc 100644
--- a/src/test/mir-opt/instrument_coverage.bar.InstrumentCoverage.diff
+++ b/src/test/mir-opt/instrument_coverage.bar.InstrumentCoverage.diff
@@ -6,7 +6,7 @@
   
       bb0: {
           _0 = const true;                 // scope 0 at /the/src/instrument_coverage.rs:20:5: 20:9
-+         Coverage { kind: Counter { function_source_hash: 10208505205182607101, id: CounterValueReference(0) }, code_region: /the/src/instrument_coverage.rs:19:18 - 21:2 }; // scope 0 at /the/src/instrument_coverage.rs:21:2: 21:2
++         Coverage::Counter(0) for /the/src/instrument_coverage.rs:19:18 - 21:2; // scope 0 at /the/src/instrument_coverage.rs:21:2: 21:2
           return;                          // scope 0 at /the/src/instrument_coverage.rs:21:2: 21:2
       }
   }
diff --git a/src/test/mir-opt/instrument_coverage.main.InstrumentCoverage.diff b/src/test/mir-opt/instrument_coverage.main.InstrumentCoverage.diff
index 43c8be8f45d..03affed0505 100644
--- a/src/test/mir-opt/instrument_coverage.main.InstrumentCoverage.diff
+++ b/src/test/mir-opt/instrument_coverage.main.InstrumentCoverage.diff
@@ -8,7 +8,7 @@
       let mut _3: !;                       // in scope 0 at /the/src/instrument_coverage.rs:12:18: 14:10
   
       bb0: {
-+         Coverage { kind: Counter { function_source_hash: 16004455475339839479, id: CounterValueReference(0) }, code_region: /the/src/instrument_coverage.rs:10:11 - 16:2 }; // scope 0 at /the/src/instrument_coverage.rs:11:5: 15:6
++         Coverage::Counter(0) for /the/src/instrument_coverage.rs:10:11 - 16:2; // scope 0 at /the/src/instrument_coverage.rs:11:5: 15:6
           falseUnwind -> [real: bb1, cleanup: bb2]; // scope 0 at /the/src/instrument_coverage.rs:11:5: 15:6
       }
   
diff --git a/src/test/run-make-fulldeps/instrument-coverage-cov-reports-base/Makefile b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-base/Makefile
new file mode 100644
index 00000000000..a16b4f61dcb
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-base/Makefile
@@ -0,0 +1,77 @@
+# needs-profiler-support
+
+# ISSUE(76038): When targeting MSVC, Rust binaries built with both `-Z instrument-coverage` and
+# `-C link-dead-code` typically crash (with a seg-fault) or at best generate an empty `*.profraw`.
+# See ../instrument-coverage/coverage_tools.mk for more information.
+
+-include ../instrument-coverage/coverage_tools.mk
+
+BASEDIR=../instrument-coverage-cov-reports-base
+SOURCEDIR=../instrument-coverage
+
+all: $(patsubst $(SOURCEDIR)/%.rs,%,$(wildcard $(SOURCEDIR)/*.rs))
+
+# Ensure there are no `expected` results for tests that may have been removed or renamed
+.PHONY: clear_expected_if_blessed
+clear_expected_if_blessed:
+ifdef RUSTC_BLESS_TEST
+	rm -f expected_export_coverage.*.json
+	rm -f typical_show_coverage.*.txt
+endif
+
+-include clear_expected_if_blessed
+
+%: $(SOURCEDIR)/%.rs
+	# Compile the test program with "experimental" coverage instrumentation and generate relevant MIR.
+	#
+	# FIXME(richkadel):  `-Zexperimental-coverage` to `-Zinstrument-coverage` once we are
+	# satisfied with the branch-level instrumentation.
+	$(RUSTC) $(SOURCEDIR)/$@.rs \
+			-Zexperimental-coverage \
+			-Clink-dead-code=$(LINK_DEAD_CODE)
+
+	# Run it in order to generate some profiling data,
+	# with `LLVM_PROFILE_FILE=<profdata_file>` environment variable set to
+	# output the coverage stats for this run.
+	LLVM_PROFILE_FILE="$(TMPDIR)"/$@.profraw \
+			$(call RUN,$@)
+
+	# Postprocess the profiling data so it can be used by the llvm-cov tool
+	"$(LLVM_BIN_DIR)"/llvm-profdata merge --sparse \
+			"$(TMPDIR)"/$@.profraw \
+			-o "$(TMPDIR)"/$@.profdata
+
+	# Generate a coverage report using `llvm-cov show`. The output ordering
+	# can be non-deterministic, so ignore the return status. If the test fails
+	# when comparing the JSON `export`, the `show` output may be useful when
+	# debugging.
+	"$(LLVM_BIN_DIR)"/llvm-cov show \
+			--Xdemangler="$(RUST_DEMANGLER)" \
+			--show-line-counts-or-regions \
+			--instr-profile="$(TMPDIR)"/$@.profdata \
+			$(call BIN,"$(TMPDIR)"/$@) \
+		> "$(TMPDIR)"/actual_show_coverage.$@.txt
+
+ifdef RUSTC_BLESS_TEST
+	cp "$(TMPDIR)"/actual_show_coverage.$@.txt typical_show_coverage.$@.txt
+else
+	# Compare the show coverage output (`--bless` refreshes `typical` files)
+	$(DIFF) typical_show_coverage.$@.txt "$(TMPDIR)"/actual_show_coverage.$@.txt || \
+		>&2 echo 'diff failed for `llvm-cov show` on $@ (might not be an error)'
+endif
+
+	# Generate a coverage report in JSON, using `llvm-cov export`, and fail if
+	# there are differences from the expected output.
+	"$(LLVM_BIN_DIR)"/llvm-cov export \
+			--summary-only \
+			--instr-profile="$(TMPDIR)"/$@.profdata \
+			$(call BIN,"$(TMPDIR)"/$@) \
+		| "$(PYTHON)" $(BASEDIR)/prettify_json.py \
+		> "$(TMPDIR)"/actual_export_coverage.$@.json
+
+ifdef RUSTC_BLESS_TEST
+	cp "$(TMPDIR)"/actual_export_coverage.$@.json expected_export_coverage.$@.json
+else
+	# Check that exported JSON coverage data matches what we expect (`--bless` refreshes `expected`)
+	$(DIFF) expected_export_coverage.$@.json "$(TMPDIR)"/actual_export_coverage.$@.json
+endif
diff --git a/src/test/run-make-fulldeps/instrument-coverage-cov-reports-base/expected_export_coverage.coverage_of_if_else.json b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-base/expected_export_coverage.coverage_of_if_else.json
new file mode 100644
index 00000000000..b9041ebebef
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-base/expected_export_coverage.coverage_of_if_else.json
@@ -0,0 +1,59 @@
+{
+  "data": [
+    {
+      "files": [
+        {
+          "filename": "../instrument-coverage/coverage_of_if_else.rs",
+          "summary": {
+            "functions": {
+              "count": 1,
+              "covered": 1,
+              "percent": 100
+            },
+            "instantiations": {
+              "count": 1,
+              "covered": 1,
+              "percent": 100
+            },
+            "lines": {
+              "count": 46,
+              "covered": 19,
+              "percent": 41.30434782608695
+            },
+            "regions": {
+              "count": 75,
+              "covered": 23,
+              "notcovered": 52,
+              "percent": 30.666666666666664
+            }
+          }
+        }
+      ],
+      "totals": {
+        "functions": {
+          "count": 1,
+          "covered": 1,
+          "percent": 100
+        },
+        "instantiations": {
+          "count": 1,
+          "covered": 1,
+          "percent": 100
+        },
+        "lines": {
+          "count": 46,
+          "covered": 19,
+          "percent": 41.30434782608695
+        },
+        "regions": {
+          "count": 75,
+          "covered": 23,
+          "notcovered": 52,
+          "percent": 30.666666666666664
+        }
+      }
+    }
+  ],
+  "type": "llvm.coverage.json.export",
+  "version": "2.0.1"
+}
diff --git a/src/test/run-make-fulldeps/instrument-coverage/prettify_json.py b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-base/prettify_json.py
index ed9279841f7..ed9279841f7 100644
--- a/src/test/run-make-fulldeps/instrument-coverage/prettify_json.py
+++ b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-base/prettify_json.py
diff --git a/src/test/run-make-fulldeps/instrument-coverage-cov-reports-base/typical_show_coverage.coverage_of_if_else.txt b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-base/typical_show_coverage.coverage_of_if_else.txt
new file mode 100644
index 00000000000..0c711559603
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-base/typical_show_coverage.coverage_of_if_else.txt
@@ -0,0 +1,64 @@
+    1|       |#![allow(unused_assignments)]
+    2|       |
+    3|       |fn main() {
+    4|       |    let mut countdown = 0;
+    5|      2|    if true {
+                     ^1
+    6|      2|        countdown = 10;
+    7|      2|    }
+    8|       |
+    9|      2|    if countdown > 7 {
+                     ^1
+   10|      2|        countdown -= 4;
+                      ^1
+   11|      2|    } else if countdown > 2 {
+                         ^0 ^0
+   12|      0|        if countdown < 1 || countdown > 5 || countdown != 9 {
+   13|      0|            countdown = 0;
+   14|      0|        }
+   15|      0|        countdown -= 5;
+   16|      0|    } else {
+   17|      0|        return;
+   18|      0|    }
+   19|      0|
+   20|      0|    let mut countdown = 0;
+   21|      2|    if true {
+                     ^1
+   22|      2|        countdown = 10;
+   23|      2|    }
+   24|      0|
+   25|      2|    if countdown > 7 {
+                     ^1
+   26|      2|        countdown -= 4;
+                      ^1
+   27|      2|    } else if countdown > 2 {
+                         ^0 ^0
+   28|      0|        if countdown < 1 || countdown > 5 || countdown != 9 {
+   29|      0|            countdown = 0;
+   30|      0|        }
+   31|      0|        countdown -= 5;
+   32|      0|    } else {
+   33|      0|        return;
+   34|      0|    }
+   35|      0|
+   36|      0|    let mut countdown = 0;
+   37|      2|    if true {
+                     ^1
+   38|      2|        countdown = 10;
+   39|      2|    }
+   40|      0|
+   41|      2|    if countdown > 7 {
+                     ^1
+   42|      2|        countdown -= 4;
+                      ^1
+   43|      2|    } else if countdown > 2 {
+                         ^0 ^0
+   44|      0|        if countdown < 1 || countdown > 5 || countdown != 9 {
+   45|      0|            countdown = 0;
+   46|      0|        }
+   47|      0|        countdown -= 5;
+   48|      0|    } else {
+   49|      0|        return;
+   50|      0|    }
+   51|      1|}
+
diff --git a/src/test/run-make-fulldeps/instrument-coverage-cov-reports-link-dead-code/Makefile b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-link-dead-code/Makefile
new file mode 100644
index 00000000000..08f311f1702
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-link-dead-code/Makefile
@@ -0,0 +1,11 @@
+# needs-profiler-support
+# ignore-msvc
+
+# LINK_DEAD_CODE requires ignore-msvc due to Issue #76038
+LINK_DEAD_CODE=yes
+
+-include ../instrument-coverage-cov-reports-base/Makefile
+
+# ISSUE(76038): When targeting MSVC, Rust binaries built with both `-Z instrument-coverage` and
+# `-C link-dead-code` typically crash (with a seg-fault) or at best generate an empty `*.profraw`.
+# See ../instrument-coverage/coverage_tools.mk for more information.
\ No newline at end of file
diff --git a/src/test/run-make-fulldeps/instrument-coverage-cov-reports-link-dead-code/expected_export_coverage.coverage_of_if_else.json b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-link-dead-code/expected_export_coverage.coverage_of_if_else.json
new file mode 100644
index 00000000000..b9041ebebef
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-link-dead-code/expected_export_coverage.coverage_of_if_else.json
@@ -0,0 +1,59 @@
+{
+  "data": [
+    {
+      "files": [
+        {
+          "filename": "../instrument-coverage/coverage_of_if_else.rs",
+          "summary": {
+            "functions": {
+              "count": 1,
+              "covered": 1,
+              "percent": 100
+            },
+            "instantiations": {
+              "count": 1,
+              "covered": 1,
+              "percent": 100
+            },
+            "lines": {
+              "count": 46,
+              "covered": 19,
+              "percent": 41.30434782608695
+            },
+            "regions": {
+              "count": 75,
+              "covered": 23,
+              "notcovered": 52,
+              "percent": 30.666666666666664
+            }
+          }
+        }
+      ],
+      "totals": {
+        "functions": {
+          "count": 1,
+          "covered": 1,
+          "percent": 100
+        },
+        "instantiations": {
+          "count": 1,
+          "covered": 1,
+          "percent": 100
+        },
+        "lines": {
+          "count": 46,
+          "covered": 19,
+          "percent": 41.30434782608695
+        },
+        "regions": {
+          "count": 75,
+          "covered": 23,
+          "notcovered": 52,
+          "percent": 30.666666666666664
+        }
+      }
+    }
+  ],
+  "type": "llvm.coverage.json.export",
+  "version": "2.0.1"
+}
diff --git a/src/test/run-make-fulldeps/instrument-coverage-cov-reports-link-dead-code/typical_show_coverage.coverage_of_if_else.txt b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-link-dead-code/typical_show_coverage.coverage_of_if_else.txt
new file mode 100644
index 00000000000..0c711559603
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-cov-reports-link-dead-code/typical_show_coverage.coverage_of_if_else.txt
@@ -0,0 +1,64 @@
+    1|       |#![allow(unused_assignments)]
+    2|       |
+    3|       |fn main() {
+    4|       |    let mut countdown = 0;
+    5|      2|    if true {
+                     ^1
+    6|      2|        countdown = 10;
+    7|      2|    }
+    8|       |
+    9|      2|    if countdown > 7 {
+                     ^1
+   10|      2|        countdown -= 4;
+                      ^1
+   11|      2|    } else if countdown > 2 {
+                         ^0 ^0
+   12|      0|        if countdown < 1 || countdown > 5 || countdown != 9 {
+   13|      0|            countdown = 0;
+   14|      0|        }
+   15|      0|        countdown -= 5;
+   16|      0|    } else {
+   17|      0|        return;
+   18|      0|    }
+   19|      0|
+   20|      0|    let mut countdown = 0;
+   21|      2|    if true {
+                     ^1
+   22|      2|        countdown = 10;
+   23|      2|    }
+   24|      0|
+   25|      2|    if countdown > 7 {
+                     ^1
+   26|      2|        countdown -= 4;
+                      ^1
+   27|      2|    } else if countdown > 2 {
+                         ^0 ^0
+   28|      0|        if countdown < 1 || countdown > 5 || countdown != 9 {
+   29|      0|            countdown = 0;
+   30|      0|        }
+   31|      0|        countdown -= 5;
+   32|      0|    } else {
+   33|      0|        return;
+   34|      0|    }
+   35|      0|
+   36|      0|    let mut countdown = 0;
+   37|      2|    if true {
+                     ^1
+   38|      2|        countdown = 10;
+   39|      2|    }
+   40|      0|
+   41|      2|    if countdown > 7 {
+                     ^1
+   42|      2|        countdown -= 4;
+                      ^1
+   43|      2|    } else if countdown > 2 {
+                         ^0 ^0
+   44|      0|        if countdown < 1 || countdown > 5 || countdown != 9 {
+   45|      0|            countdown = 0;
+   46|      0|        }
+   47|      0|        countdown -= 5;
+   48|      0|    } else {
+   49|      0|        return;
+   50|      0|    }
+   51|      1|}
+
diff --git a/src/test/run-make-fulldeps/instrument-coverage-llvm-ir-base/Makefile b/src/test/run-make-fulldeps/instrument-coverage-llvm-ir-base/Makefile
new file mode 100644
index 00000000000..f623248ab57
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-llvm-ir-base/Makefile
@@ -0,0 +1,65 @@
+# needs-profiler-support
+
+# ISSUE(76038): When targeting MSVC, Rust binaries built with both `-Z instrument-coverage` and
+# `-C link-dead-code` typically crash (with a seg-fault) or at best generate an empty `*.profraw`.
+# See ../instrument-coverage/coverage_tools.mk for more information.
+
+-include ../instrument-coverage/coverage_tools.mk
+
+BASEDIR=../instrument-coverage-llvm-ir-base
+
+ifeq ($(UNAME),Darwin)
+	INSTR_PROF_DATA_SUFFIX=,regular,live_support
+	DATA_SECTION_PREFIX=__DATA,
+	LLVM_COV_SECTION_PREFIX=__LLVM_COV,
+else
+	INSTR_PROF_DATA_SUFFIX=
+	DATA_SECTION_PREFIX=
+	LLVM_COV_SECTION_PREFIX=
+endif
+
+ifeq ($(LINK_DEAD_CODE),yes)
+	DEFINE_INTERNAL=define hidden
+else
+	DEFINE_INTERNAL=define internal
+endif
+
+ifdef IS_WINDOWS
+	LLVM_FILECHECK_OPTIONS=\
+		-check-prefixes=CHECK,WINDOWS \
+		-DPRIVATE_GLOBAL='internal global' \
+		-DDEFINE_INTERNAL='$(DEFINE_INTERNAL)' \
+		-DINSTR_PROF_DATA='.lprfd$$M' \
+		-DINSTR_PROF_NAME='.lprfn$$M' \
+		-DINSTR_PROF_CNTS='.lprfc$$M' \
+		-DINSTR_PROF_VALS='.lprfv$$M' \
+		-DINSTR_PROF_VNODES='.lprfnd$$M' \
+		-DINSTR_PROF_COVMAP='.lcovmap$$M' \
+		-DINSTR_PROF_ORDERFILE='.lorderfile$$M'
+else
+	LLVM_FILECHECK_OPTIONS=\
+		-check-prefixes=CHECK \
+		-DPRIVATE_GLOBAL='private global' \
+		-DDEFINE_INTERNAL='$(DEFINE_INTERNAL)' \
+		-DINSTR_PROF_DATA='$(DATA_SECTION_PREFIX)__llvm_prf_data$(INSTR_PROF_DATA_SUFFIX)' \
+		-DINSTR_PROF_NAME='$(DATA_SECTION_PREFIX)__llvm_prf_names' \
+		-DINSTR_PROF_CNTS='$(DATA_SECTION_PREFIX)__llvm_prf_cnts' \
+		-DINSTR_PROF_VALS='$(DATA_SECTION_PREFIX)__llvm_prf_vals' \
+		-DINSTR_PROF_VNODES='$(DATA_SECTION_PREFIX)__llvm_prf_vnds' \
+		-DINSTR_PROF_COVMAP='$(LLVM_COV_SECTION_PREFIX)__llvm_covmap' \
+		-DINSTR_PROF_ORDERFILE='$(DATA_SECTION_PREFIX)__llvm_orderfile'
+endif
+
+all:
+	# Compile the test program with non-experimental coverage instrumentation, and generate LLVM IR
+	#
+	# Note: `-Clink-dead-code=no` disables the option, needed because the option is automatically
+	# enabled for some platforms, but not for Windows MSVC (due to Issue #76038). The state of this
+	# option affects the generated MIR and coverage, so it is enabled for tests to ensure the
+	# tests results are the same across platforms.
+	$(RUSTC) $(BASEDIR)/testprog.rs \
+			-Zinstrument-coverage \
+			-Clink-dead-code=$(LINK_DEAD_CODE) \
+			--emit=llvm-ir
+
+	cat "$(TMPDIR)"/testprog.ll | "$(LLVM_FILECHECK)" $(BASEDIR)/filecheck.testprog.txt $(LLVM_FILECHECK_OPTIONS)
diff --git a/src/test/run-make-fulldeps/instrument-coverage-llvm-ir-base/filecheck.testprog.txt b/src/test/run-make-fulldeps/instrument-coverage-llvm-ir-base/filecheck.testprog.txt
new file mode 100644
index 00000000000..0a3c4aedd55
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-llvm-ir-base/filecheck.testprog.txt
@@ -0,0 +1,49 @@
+# Check for metadata, variables, declarations, and function definitions injected
+# into LLVM IR when compiling with -Zinstrument-coverage.
+
+WINDOWS:      $__llvm_profile_runtime_user = comdat any
+
+CHECK:        @__llvm_coverage_mapping = internal constant
+CHECK-SAME:   section "[[INSTR_PROF_COVMAP]]", align 8
+
+WINDOWS:      @__llvm_profile_runtime = external global i32
+
+CHECK:        @__profc__R{{[a-zA-Z0-9_]+}}testprog14will_be_called = [[PRIVATE_GLOBAL]]
+CHECK-SAME:   section "[[INSTR_PROF_CNTS]]", align 8
+
+CHECK:        @__profd__R{{[a-zA-Z0-9_]+}}testprog14will_be_called = [[PRIVATE_GLOBAL]]
+CHECK-SAME:   @__profc__R{{[a-zA-Z0-9_]+}}testprog14will_be_called,
+CHECK-SAME:   section "[[INSTR_PROF_DATA]]", align 8
+
+CHECK:        @__profc__R{{[a-zA-Z0-9_]+}}testprog4main = [[PRIVATE_GLOBAL]]
+CHECK-SAME:   section "[[INSTR_PROF_CNTS]]", align 8
+
+CHECK:        @__profd__R{{[a-zA-Z0-9_]+}}testprog4main = [[PRIVATE_GLOBAL]]
+CHECK-SAME:   @__profc__R{{[a-zA-Z0-9_]+}}testprog4main,
+CHECK-SAME:   section "[[INSTR_PROF_DATA]]", align 8
+
+CHECK:        @__llvm_prf_nm = private constant
+CHECK-SAME:   section "[[INSTR_PROF_NAME]]", align 1
+
+CHECK:        @llvm.used = appending global
+CHECK-SAME:   i8* bitcast ({ {{.*}} }* @__llvm_coverage_mapping to i8*)
+WINDOWS-SAME: i8* bitcast (i32 ()* @__llvm_profile_runtime_user to i8*)
+CHECK-SAME:   i8* bitcast ({ {{.*}} }* @__profd__R{{[a-zA-Z0-9_]*}}testprog4main to i8*)
+CHECK-SAME:   i8* getelementptr inbounds ({{.*}}* @__llvm_prf_nm, i32 0, i32 0)
+CHECK-SAME:   section "llvm.metadata"
+
+CHECK:        [[DEFINE_INTERNAL]] { {{.*}} } @_R{{[a-zA-Z0-9_]+}}testprog14will_be_called() unnamed_addr #{{[0-9]+}} {
+CHECK-NEXT:   start:
+CHECK-NOT:    bb{{[0-9]+}}:
+CHECK:        %pgocount = load i64, i64* getelementptr inbounds
+CHECK-SAME:   * @__profc__R{{[a-zA-Z0-9_]+}}testprog14will_be_called,
+
+CHECK:        declare void @llvm.instrprof.increment(i8*, i64, i32, i32) #[[LLVM_INSTRPROF_INCREMENT_ATTR:[0-9]+]]
+
+WINDOWS:      define linkonce_odr hidden i32 @__llvm_profile_runtime_user() #[[LLVM_PROFILE_RUNTIME_USER_ATTR:[0-9]+]] comdat {
+WINDOWS-NEXT: %1 = load i32, i32* @__llvm_profile_runtime
+WINDOWS-NEXT: ret i32 %1
+WINDOWS-NEXT: }
+
+CHECK:        attributes #[[LLVM_INSTRPROF_INCREMENT_ATTR]] = { nounwind }
+WINDOWS:      attributes #[[LLVM_PROFILE_RUNTIME_USER_ATTR]] = { noinline }
diff --git a/src/test/run-make-fulldeps/instrument-coverage/testprog.rs b/src/test/run-make-fulldeps/instrument-coverage-llvm-ir-base/testprog.rs
index 358c25677ae..358c25677ae 100644
--- a/src/test/run-make-fulldeps/instrument-coverage/testprog.rs
+++ b/src/test/run-make-fulldeps/instrument-coverage-llvm-ir-base/testprog.rs
diff --git a/src/test/run-make-fulldeps/instrument-coverage-llvm-ir-link-dead-code/Makefile b/src/test/run-make-fulldeps/instrument-coverage-llvm-ir-link-dead-code/Makefile
new file mode 100644
index 00000000000..ba2126a6b3f
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-llvm-ir-link-dead-code/Makefile
@@ -0,0 +1,11 @@
+# needs-profiler-support
+# ignore-msvc
+
+# LINK_DEAD_CODE requires ignore-msvc due to Issue #76038
+LINK_DEAD_CODE=yes
+
+-include ../instrument-coverage-llvm-ir-base/Makefile
+
+# ISSUE(76038): When targeting MSVC, Rust binaries built with both `-Z instrument-coverage` and
+# `-C link-dead-code` typically crash (with a seg-fault) or at best generate an empty `*.profraw`.
+# See ../instrument-coverage/coverage_tools.mk for more information.
\ No newline at end of file
diff --git a/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-base/Makefile b/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-base/Makefile
new file mode 100644
index 00000000000..5cd425979ea
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-base/Makefile
@@ -0,0 +1,42 @@
+# needs-profiler-support
+
+# ISSUE(76038): When targeting MSVC, Rust binaries built with both `-Z instrument-coverage` and
+# `-C link-dead-code` typically crash (with a seg-fault) or at best generate an empty `*.profraw`.
+# See ../instrument-coverage/coverage_tools.mk for more information.
+
+-include ../instrument-coverage/coverage_tools.mk
+
+SOURCEDIR=../instrument-coverage
+
+all: $(patsubst $(SOURCEDIR)/%.rs,%,$(wildcard $(SOURCEDIR)/*.rs))
+
+# Ensure there are no `expected` results for tests that may have been removed or renamed
+.PHONY: clear_expected_if_blessed
+clear_expected_if_blessed:
+ifdef RUSTC_BLESS_TEST
+	rm -rf expected_mir_dump.*/
+endif
+
+-include clear_expected_if_blessed
+
+%: $(SOURCEDIR)/%.rs
+	# Compile the test program with "experimental" coverage instrumentation and generate relevant MIR.
+	#
+	# FIXME(richkadel): `-Zexperimental-coverage` to `-Zinstrument-coverage` once we are
+	# satisfied with the branch-level instrumentation.
+	$(RUSTC) $(SOURCEDIR)/$@.rs \
+			-Zexperimental-coverage \
+			-Clink-dead-code=$(LINK_DEAD_CODE) \
+			-Zdump-mir=InstrumentCoverage \
+			-Zdump-mir-dir="$(TMPDIR)"/mir_dump.$@
+
+ifdef RUSTC_BLESS_TEST
+	mkdir -p expected_mir_dump.$@
+	cp "$(TMPDIR)"/mir_dump.$@/*InstrumentCoverage.0.html expected_mir_dump.$@/
+else
+	# Check that the selected `mir_dump` files match what we expect (`--bless` refreshes `expected`)
+	mkdir -p "$(TMPDIR)"/actual_mir_dump.$@
+	rm -f "$(TMPDIR)"/actual_mir_dump.$@/*
+	cp "$(TMPDIR)"/mir_dump.$@/*InstrumentCoverage.0.html "$(TMPDIR)"/actual_mir_dump.$@/
+	$(DIFF) -r expected_mir_dump.$@/ "$(TMPDIR)"/actual_mir_dump.$@/
+endif
diff --git a/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-base/expected_mir_dump.coverage_of_if_else/coverage_of_if_else.main.-------.InstrumentCoverage.0.html b/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-base/expected_mir_dump.coverage_of_if_else/coverage_of_if_else.main.-------.InstrumentCoverage.0.html
new file mode 100644
index 00000000000..faa5d65e7e7
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-base/expected_mir_dump.coverage_of_if_else/coverage_of_if_else.main.-------.InstrumentCoverage.0.html
@@ -0,0 +1,583 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>coverage_of_if_else - Code Regions</title>
+    <style>
+    .line {
+        counter-increment: line;
+    }
+    .line:before {
+        content: counter(line) ": ";
+        font-family: Menlo, Monaco, monospace;
+        font-style: italic;
+        width: 3.8em;
+        display: inline-block;
+        text-align: right;
+        filter: opacity(50%);
+        -webkit-user-select: none;
+    }
+    .code {
+        color: #dddddd;
+        background-color: #222222;
+        font-family: Menlo, Monaco, monospace;
+        line-height: 1.4em;
+        border-bottom: 2px solid #222222;
+        white-space: pre;
+        display: inline-block;
+    }
+    .odd {
+        background-color: #55bbff;
+        color: #223311;
+    }
+    .even {
+        background-color: #ee7756;
+        color: #551133;
+    }
+    .code {
+        --index: calc(var(--layer) - 1);
+        padding-top: calc(var(--index) * 0.15em);
+        filter:
+            hue-rotate(calc(var(--index) * 25deg))
+            saturate(calc(100% - (var(--index) * 2%)))
+            brightness(calc(100% - (var(--index) * 1.5%)));
+    }
+    .annotation {
+        color: #4444ff;
+        font-family: monospace;
+        font-style: italic;
+        display: none;
+        -webkit-user-select: none;
+    }
+    body:active .annotation {
+        /* requires holding mouse down anywhere on the page */
+        display: inline-block;
+    }
+    span:hover .annotation {
+        /* requires hover over a span ONLY on its first line */
+        display: inline-block;
+    }
+    </style>
+</head>
+<body>
+<div class="code" style="counter-reset: line 2"><span class="line"><span class="code" style="--layer: 0">fn main() {</span></span>
+<span class="line"><span class="code" style="--layer: 0">    let mut countdown = 0;</span></span>
+<span class="line"><span class="code" style="--layer: 0">    </span><span><span class="code even" style="--layer: 1" title="bb2: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    5:5-7:6: FalseEdge: falseEdge -&gt; [real: bb4, imaginary: bb3]"><span class="annotation">@2</span></span></span><span class="code even" style="--layer: 2" title="bb4: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    6:9-6:23: Assign: _1 = const 10_i32
+    5:13-7:6: Assign: _2 = const ()
+    5:5-7:6: Goto: goto -&gt; bb5"><span class="annotation">@4</span></span><span class="code even" style="--layer: 3" title="bb3: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    5:5-7:6: Assign: _2 = const ()
+    5:5-7:6: Goto: goto -&gt; bb5"><span class="annotation">@3:</span> if </span><span class="code even" style="--layer: 4" title="bb0: ../instrument-coverage/coverage_of_if_else.rs:5:8: 5:12:
+    4:9-4:22: StorageLive: StorageLive(_1)
+    4:25-4:26: Assign: _1 = const 0_i32
+    4:9-4:22: FakeRead: FakeRead(ForLet, _1)
+    5:5-7:6: StorageLive: StorageLive(_2)
+    5:8-5:12: StorageLive: StorageLive(_3)
+    5:8-5:12: Assign: _3 = const true
+    5:8-5:12: FakeRead: FakeRead(ForMatchedPlace, _3)
+    5:5-7:6: SwitchInt: switchInt(_3) -&gt; [false: bb3, otherwise: bb2]"><span class="annotation">@0:</span> true</span><span class="code even" style="--layer: 3" title="bb3: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    5:5-7:6: Assign: _2 = const ()
+    5:5-7:6: Goto: goto -&gt; bb5"><span class="annotation">@3:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 3" title="bb3: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    5:5-7:6: Assign: _2 = const ()
+    5:5-7:6: Goto: goto -&gt; bb5">        countdown = 10;</span></span>
+<span class="line"><span class="code even" style="--layer: 3" title="bb3: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    5:5-7:6: Assign: _2 = const ()
+    5:5-7:6: Goto: goto -&gt; bb5">    }</span><span class="code" style="--layer: 0"></span></span>
+<span class="line"><span class="code" style="--layer: 0"></span></span>
+<span class="line"><span class="code" style="--layer: 0">    </span><span><span class="code even" style="--layer: 1" title="bb6: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    9:5-18:6: FalseEdge: falseEdge -&gt; [real: bb8, imaginary: bb7]"><span class="annotation">@6</span></span></span><span class="code even" style="--layer: 2" title="bb9: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    10:9-10:23: Assign: _1 = move (_7.0: i32)
+    9:22-11:6: Assign: _4 = const ()
+    9:5-18:6: Goto: goto -&gt; bb28"><span class="annotation">@9</span></span><span class="code even" style="--layer: 3" title="bb25: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    15:9-15:23: Assign: _1 = move (_19.0: i32)
+    11:29-16:6: Assign: _4 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    9:5-18:6: Goto: goto -&gt; bb28"><span class="annotation">@25:</span> if </span><span class="code even" style="--layer: 4" title="bb5: ../instrument-coverage/coverage_of_if_else.rs:9:8: 9:21:
+    7:5-7:6: StorageDead: StorageDead(_3)
+    7:5-7:6: StorageDead: StorageDead(_2)
+    9:5-18:6: StorageLive: StorageLive(_4)
+    9:8-9:21: StorageLive: StorageLive(_5)
+    9:8-9:17: StorageLive: StorageLive(_6)
+    9:8-9:17: Assign: _6 = _1
+    9:8-9:21: Assign: _5 = Gt(move _6, const 7_i32)
+    9:20-9:21: StorageDead: StorageDead(_6)
+    9:8-9:21: FakeRead: FakeRead(ForMatchedPlace, _5)
+    9:5-18:6: SwitchInt: switchInt(_5) -&gt; [false: bb7, otherwise: bb6]"><span class="annotation">@5:</span> countdown &gt; 7</span><span class="code even" style="--layer: 3" title="bb25: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    15:9-15:23: Assign: _1 = move (_19.0: i32)
+    11:29-16:6: Assign: _4 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    9:5-18:6: Goto: goto -&gt; bb28"><span class="annotation">@25:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 3" title="bb25: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    15:9-15:23: Assign: _1 = move (_19.0: i32)
+    11:29-16:6: Assign: _4 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    9:5-18:6: Goto: goto -&gt; bb28">        </span><span class="code odd" style="--layer: 4" title="bb8: ../instrument-coverage/coverage_of_if_else.rs:10:9: 10:23:
+    10:9-10:23: Assign: _7 = CheckedSub(_1, const 4_i32)
+    10:9-10:23: Assert: assert(!move (_7.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _1, const 4_i32) -&gt; [success: bb9, unwind: bb1]"><span class="annotation">@8:</span> countdown -= 4</span><span class="code even" style="--layer: 3" title="bb25: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    15:9-15:23: Assign: _1 = move (_19.0: i32)
+    11:29-16:6: Assign: _4 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    9:5-18:6: Goto: goto -&gt; bb28"><span class="annotation">@25:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 3" title="bb25: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    15:9-15:23: Assign: _1 = move (_19.0: i32)
+    11:29-16:6: Assign: _4 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    9:5-18:6: Goto: goto -&gt; bb28">    } else </span><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]"><span class="annotation">@10:</span> if </span><span class="code even" style="--layer: 5" title="bb7: ../instrument-coverage/coverage_of_if_else.rs:11:15: 11:28:
+    11:15-11:28: StorageLive: StorageLive(_8)
+    11:15-11:24: StorageLive: StorageLive(_9)
+    11:15-11:24: Assign: _9 = _1
+    11:15-11:28: Assign: _8 = Gt(move _9, const 2_i32)
+    11:27-11:28: StorageDead: StorageDead(_9)
+    11:15-11:28: FakeRead: FakeRead(ForMatchedPlace, _8)
+    11:12-18:6: SwitchInt: switchInt(_8) -&gt; [false: bb11, otherwise: bb10]"><span class="annotation">@7:</span> countdown &gt; 2</span><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]"><span class="annotation">@10:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]">        </span><span class="code odd" style="--layer: 5" title="bb22: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    12:9-14:10: Assign: _10 = const ()
+    12:9-14:10: Goto: goto -&gt; bb24"><span class="annotation">@22</span></span><span class="code even" style="--layer: 6" title="bb23: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    13:13-13:26: Assign: _1 = const 0_i32
+    12:61-14:10: Assign: _10 = const ()
+    12:9-14:10: Goto: goto -&gt; bb24"><span class="annotation">@23</span></span><span class="code even" style="--layer: 7" title="bb21: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    12:9-14:10: FalseEdge: falseEdge -&gt; [real: bb23, imaginary: bb22]"><span class="annotation">@21:</span> if </span><span class="code even" style="--layer: 8" title="bb14: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:12-12:60: Assign: _11 = const false
+    12:12-12:60: Goto: goto -&gt; bb16"><span class="annotation">@14</span></span><span class="code even" style="--layer: 9" title="bb15: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:46-12:60: StorageLive: StorageLive(_17)
+    12:46-12:55: StorageLive: StorageLive(_18)
+    12:46-12:55: Assign: _18 = _1
+    12:46-12:60: Assign: _17 = Ne(move _18, const 9_i32)
+    12:59-12:60: StorageDead: StorageDead(_18)
+    12:12-12:60: SwitchInt: switchInt(move _17) -&gt; [false: bb14, otherwise: bb13]"><span class="annotation">@15</span></span><span class="code even" style="--layer: 10" title="bb16: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:59-12:60: StorageDead: StorageDead(_17)
+    12:59-12:60: StorageDead: StorageDead(_12)
+    12:12-12:60: FakeRead: FakeRead(ForMatchedPlace, _11)
+    12:9-14:10: SwitchInt: switchInt(_11) -&gt; [false: bb22, otherwise: bb21]"><span class="annotation">@16</span></span><span class="code even" style="--layer: 11" title="bb13: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:12-12:60: Assign: _11 = const true
+    12:12-12:60: Goto: goto -&gt; bb16"><span class="annotation">@13</span></span><span class="code even" style="--layer: 12" title="bb20: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:41-12:42: StorageDead: StorageDead(_15)
+    12:41-12:42: StorageDead: StorageDead(_13)
+    12:12-12:60: SwitchInt: switchInt(move _12) -&gt; [false: bb15, otherwise: bb13]"><span class="annotation">@20</span></span><span class="code even" style="--layer: 13" title="bb12: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:9-14:10: StorageLive: StorageLive(_10)
+    12:12-12:60: StorageLive: StorageLive(_11)
+    12:12-12:42: StorageLive: StorageLive(_12)
+    12:12-12:25: StorageLive: StorageLive(_13)
+    12:12-12:21: StorageLive: StorageLive(_14)
+    12:12-12:21: Assign: _14 = _1
+    12:12-12:25: Assign: _13 = Lt(move _14, const 1_i32)
+    12:24-12:25: StorageDead: StorageDead(_14)
+    12:12-12:42: SwitchInt: switchInt(move _13) -&gt; [false: bb19, otherwise: bb17]"><span class="annotation">@12</span></span><span class="code even" style="--layer: 14" title="bb18: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:42:
+    12:12-12:42: Assign: _12 = const false
+    12:12-12:42: Goto: goto -&gt; bb20"><span class="annotation">@18</span></span><span class="code even" style="--layer: 15" title="bb19: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:42:
+    12:29-12:42: StorageLive: StorageLive(_15)
+    12:29-12:38: StorageLive: StorageLive(_16)
+    12:29-12:38: Assign: _16 = _1
+    12:29-12:42: Assign: _15 = Gt(move _16, const 5_i32)
+    12:41-12:42: StorageDead: StorageDead(_16)
+    12:12-12:42: SwitchInt: switchInt(move _15) -&gt; [false: bb18, otherwise: bb17]"><span class="annotation">@19</span></span><span class="code even" style="--layer: 16" title="bb17: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:42:
+    12:12-12:42: Assign: _12 = const true
+    12:12-12:42: Goto: goto -&gt; bb20"><span class="annotation">@17:</span> countdown &lt; 1 || countdown &gt; 5</span><span class="code even" style="--layer: 13" title="bb12: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:9-14:10: StorageLive: StorageLive(_10)
+    12:12-12:60: StorageLive: StorageLive(_11)
+    12:12-12:42: StorageLive: StorageLive(_12)
+    12:12-12:25: StorageLive: StorageLive(_13)
+    12:12-12:21: StorageLive: StorageLive(_14)
+    12:12-12:21: Assign: _14 = _1
+    12:12-12:25: Assign: _13 = Lt(move _14, const 1_i32)
+    12:24-12:25: StorageDead: StorageDead(_14)
+    12:12-12:42: SwitchInt: switchInt(move _13) -&gt; [false: bb19, otherwise: bb17]"><span class="annotation">@12:</span>  || countdown != 9</span><span class="code even" style="--layer: 7" title="bb21: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    12:9-14:10: FalseEdge: falseEdge -&gt; [real: bb23, imaginary: bb22]"><span class="annotation">@21:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 7" title="bb21: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    12:9-14:10: FalseEdge: falseEdge -&gt; [real: bb23, imaginary: bb22]">            countdown = 0;</span></span>
+<span class="line"><span class="code even" style="--layer: 7" title="bb21: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    12:9-14:10: FalseEdge: falseEdge -&gt; [real: bb23, imaginary: bb22]">        </span><span class="code odd" style="--layer: 8" title="bb24: ../instrument-coverage/coverage_of_if_else.rs:14:9: 15:23:
+    14:9-14:10: StorageDead: StorageDead(_11)
+    14:9-14:10: StorageDead: StorageDead(_10)
+    15:9-15:23: Assign: _19 = CheckedSub(_1, const 5_i32)
+    15:9-15:23: Assert: assert(!move (_19.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _1, const 5_i32) -&gt; [success: bb25, unwind: bb1]"><span class="annotation">@24:</span> }</span></span>
+<span class="line"><span class="code odd" style="--layer: 8" title="bb24: ../instrument-coverage/coverage_of_if_else.rs:14:9: 15:23:
+    14:9-14:10: StorageDead: StorageDead(_11)
+    14:9-14:10: StorageDead: StorageDead(_10)
+    15:9-15:23: Assign: _19 = CheckedSub(_1, const 5_i32)
+    15:9-15:23: Assert: assert(!move (_19.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _1, const 5_i32) -&gt; [success: bb25, unwind: bb1]">        countdown -= 5</span><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]"><span class="annotation">@10:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]">    } else {</span></span>
+<span class="line"><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]">        </span><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26"><span class="annotation">@27</span></span><span class="code even" style="--layer: 6" title="bb11: ../instrument-coverage/coverage_of_if_else.rs:17:9: 18:6:
+    17:9-17:15: Assign: _0 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    18:5-18:6: StorageDead: StorageDead(_5)
+    18:5-18:6: StorageDead: StorageDead(_4)
+    17:9-17:15: Goto: goto -&gt; bb27"><span class="annotation">@11:</span> return;</span></span>
+<span class="line"><span class="code even" style="--layer: 6" title="bb11: ../instrument-coverage/coverage_of_if_else.rs:17:9: 18:6:
+    17:9-17:15: Assign: _0 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    18:5-18:6: StorageDead: StorageDead(_5)
+    18:5-18:6: StorageDead: StorageDead(_4)
+    17:9-17:15: Goto: goto -&gt; bb27">    }</span><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26"><span class="annotation">@27:</span> </span></span>
+<span class="line"><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26"></span></span>
+<span class="line"><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26">    let mut countdown = 0;</span></span>
+<span class="line"><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26">    </span><span class="code odd" style="--layer: 6" title="bb30: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    21:5-23:6: Assign: _22 = const ()
+    21:5-23:6: Goto: goto -&gt; bb32"><span class="annotation">@30</span></span><span class="code even" style="--layer: 7" title="bb31: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    22:9-22:23: Assign: _21 = const 10_i32
+    21:13-23:6: Assign: _22 = const ()
+    21:5-23:6: Goto: goto -&gt; bb32"><span class="annotation">@31</span></span><span class="code even" style="--layer: 8" title="bb29: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    21:5-23:6: FalseEdge: falseEdge -&gt; [real: bb31, imaginary: bb30]"><span class="annotation">@29:</span> if </span><span class="code even" style="--layer: 9" title="bb28: ../instrument-coverage/coverage_of_if_else.rs:21:8: 21:12:
+    18:5-18:6: StorageDead: StorageDead(_5)
+    18:5-18:6: StorageDead: StorageDead(_4)
+    20:9-20:22: StorageLive: StorageLive(_21)
+    20:25-20:26: Assign: _21 = const 0_i32
+    20:9-20:22: FakeRead: FakeRead(ForLet, _21)
+    21:5-23:6: StorageLive: StorageLive(_22)
+    21:8-21:12: StorageLive: StorageLive(_23)
+    21:8-21:12: Assign: _23 = const true
+    21:8-21:12: FakeRead: FakeRead(ForMatchedPlace, _23)
+    21:5-23:6: SwitchInt: switchInt(_23) -&gt; [false: bb30, otherwise: bb29]"><span class="annotation">@28:</span> true</span><span class="code even" style="--layer: 8" title="bb29: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    21:5-23:6: FalseEdge: falseEdge -&gt; [real: bb31, imaginary: bb30]"><span class="annotation">@29:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 8" title="bb29: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    21:5-23:6: FalseEdge: falseEdge -&gt; [real: bb31, imaginary: bb30]">        countdown = 10;</span></span>
+<span class="line"><span class="code even" style="--layer: 8" title="bb29: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    21:5-23:6: FalseEdge: falseEdge -&gt; [real: bb31, imaginary: bb30]">    }</span><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26"><span class="annotation">@27:</span> </span></span>
+<span class="line"><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26"></span></span>
+<span class="line"><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26">    </span><span class="code even" style="--layer: 6" title="bb33: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    25:5-34:6: FalseEdge: falseEdge -&gt; [real: bb35, imaginary: bb34]"><span class="annotation">@33</span></span><span class="code even" style="--layer: 7" title="bb52: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    31:9-31:23: Assign: _21 = move (_39.0: i32)
+    27:29-32:6: Assign: _24 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    25:5-34:6: Goto: goto -&gt; bb53"><span class="annotation">@52</span></span><span class="code even" style="--layer: 8" title="bb36: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    26:9-26:23: Assign: _21 = move (_27.0: i32)
+    25:22-27:6: Assign: _24 = const ()
+    25:5-34:6: Goto: goto -&gt; bb53"><span class="annotation">@36:</span> if </span><span class="code even" style="--layer: 9" title="bb32: ../instrument-coverage/coverage_of_if_else.rs:25:8: 25:21:
+    23:5-23:6: StorageDead: StorageDead(_23)
+    23:5-23:6: StorageDead: StorageDead(_22)
+    25:5-34:6: StorageLive: StorageLive(_24)
+    25:8-25:21: StorageLive: StorageLive(_25)
+    25:8-25:17: StorageLive: StorageLive(_26)
+    25:8-25:17: Assign: _26 = _21
+    25:8-25:21: Assign: _25 = Gt(move _26, const 7_i32)
+    25:20-25:21: StorageDead: StorageDead(_26)
+    25:8-25:21: FakeRead: FakeRead(ForMatchedPlace, _25)
+    25:5-34:6: SwitchInt: switchInt(_25) -&gt; [false: bb34, otherwise: bb33]"><span class="annotation">@32:</span> countdown &gt; 7</span><span class="code even" style="--layer: 8" title="bb36: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    26:9-26:23: Assign: _21 = move (_27.0: i32)
+    25:22-27:6: Assign: _24 = const ()
+    25:5-34:6: Goto: goto -&gt; bb53"><span class="annotation">@36:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 8" title="bb36: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    26:9-26:23: Assign: _21 = move (_27.0: i32)
+    25:22-27:6: Assign: _24 = const ()
+    25:5-34:6: Goto: goto -&gt; bb53">        </span><span class="code odd" style="--layer: 9" title="bb35: ../instrument-coverage/coverage_of_if_else.rs:26:9: 26:23:
+    26:9-26:23: Assign: _27 = CheckedSub(_21, const 4_i32)
+    26:9-26:23: Assert: assert(!move (_27.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _21, const 4_i32) -&gt; [success: bb36, unwind: bb1]"><span class="annotation">@35:</span> countdown -= 4</span><span class="code even" style="--layer: 8" title="bb36: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    26:9-26:23: Assign: _21 = move (_27.0: i32)
+    25:22-27:6: Assign: _24 = const ()
+    25:5-34:6: Goto: goto -&gt; bb53"><span class="annotation">@36:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 8" title="bb36: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    26:9-26:23: Assign: _21 = move (_27.0: i32)
+    25:22-27:6: Assign: _24 = const ()
+    25:5-34:6: Goto: goto -&gt; bb53">    } else </span><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]"><span class="annotation">@37:</span> if </span><span class="code even" style="--layer: 10" title="bb34: ../instrument-coverage/coverage_of_if_else.rs:27:15: 27:28:
+    27:15-27:28: StorageLive: StorageLive(_28)
+    27:15-27:24: StorageLive: StorageLive(_29)
+    27:15-27:24: Assign: _29 = _21
+    27:15-27:28: Assign: _28 = Gt(move _29, const 2_i32)
+    27:27-27:28: StorageDead: StorageDead(_29)
+    27:15-27:28: FakeRead: FakeRead(ForMatchedPlace, _28)
+    27:12-34:6: SwitchInt: switchInt(_28) -&gt; [false: bb38, otherwise: bb37]"><span class="annotation">@34:</span> countdown &gt; 2</span><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]"><span class="annotation">@37:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]">        </span><span class="code odd" style="--layer: 10" title="bb48: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    28:9-30:10: FalseEdge: falseEdge -&gt; [real: bb50, imaginary: bb49]"><span class="annotation">@48</span></span><span class="code even" style="--layer: 11" title="bb50: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    29:13-29:26: Assign: _21 = const 0_i32
+    28:61-30:10: Assign: _30 = const ()
+    28:9-30:10: Goto: goto -&gt; bb51"><span class="annotation">@50</span></span><span class="code even" style="--layer: 12" title="bb49: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    28:9-30:10: Assign: _30 = const ()
+    28:9-30:10: Goto: goto -&gt; bb51"><span class="annotation">@49:</span> if </span><span class="code even" style="--layer: 13" title="bb39: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:9-30:10: StorageLive: StorageLive(_30)
+    28:12-28:60: StorageLive: StorageLive(_31)
+    28:12-28:42: StorageLive: StorageLive(_32)
+    28:12-28:25: StorageLive: StorageLive(_33)
+    28:12-28:21: StorageLive: StorageLive(_34)
+    28:12-28:21: Assign: _34 = _21
+    28:12-28:25: Assign: _33 = Lt(move _34, const 1_i32)
+    28:24-28:25: StorageDead: StorageDead(_34)
+    28:12-28:42: SwitchInt: switchInt(move _33) -&gt; [false: bb46, otherwise: bb44]"><span class="annotation">@39</span></span><span class="code even" style="--layer: 14" title="bb47: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:41-28:42: StorageDead: StorageDead(_35)
+    28:41-28:42: StorageDead: StorageDead(_33)
+    28:12-28:60: SwitchInt: switchInt(move _32) -&gt; [false: bb42, otherwise: bb40]"><span class="annotation">@47</span></span><span class="code even" style="--layer: 15" title="bb40: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:12-28:60: Assign: _31 = const true
+    28:12-28:60: Goto: goto -&gt; bb43"><span class="annotation">@40</span></span><span class="code even" style="--layer: 16" title="bb43: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:59-28:60: StorageDead: StorageDead(_37)
+    28:59-28:60: StorageDead: StorageDead(_32)
+    28:12-28:60: FakeRead: FakeRead(ForMatchedPlace, _31)
+    28:9-30:10: SwitchInt: switchInt(_31) -&gt; [false: bb49, otherwise: bb48]"><span class="annotation">@43</span></span><span class="code even" style="--layer: 17" title="bb42: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:46-28:60: StorageLive: StorageLive(_37)
+    28:46-28:55: StorageLive: StorageLive(_38)
+    28:46-28:55: Assign: _38 = _21
+    28:46-28:60: Assign: _37 = Ne(move _38, const 9_i32)
+    28:59-28:60: StorageDead: StorageDead(_38)
+    28:12-28:60: SwitchInt: switchInt(move _37) -&gt; [false: bb41, otherwise: bb40]"><span class="annotation">@42</span></span><span class="code even" style="--layer: 18" title="bb41: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:12-28:60: Assign: _31 = const false
+    28:12-28:60: Goto: goto -&gt; bb43"><span class="annotation">@41</span></span><span class="code even" style="--layer: 19" title="bb46: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:42:
+    28:29-28:42: StorageLive: StorageLive(_35)
+    28:29-28:38: StorageLive: StorageLive(_36)
+    28:29-28:38: Assign: _36 = _21
+    28:29-28:42: Assign: _35 = Gt(move _36, const 5_i32)
+    28:41-28:42: StorageDead: StorageDead(_36)
+    28:12-28:42: SwitchInt: switchInt(move _35) -&gt; [false: bb45, otherwise: bb44]"><span class="annotation">@46</span></span><span class="code even" style="--layer: 20" title="bb45: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:42:
+    28:12-28:42: Assign: _32 = const false
+    28:12-28:42: Goto: goto -&gt; bb47"><span class="annotation">@45</span></span><span class="code even" style="--layer: 21" title="bb44: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:42:
+    28:12-28:42: Assign: _32 = const true
+    28:12-28:42: Goto: goto -&gt; bb47"><span class="annotation">@44:</span> countdown &lt; 1 || countdown &gt; 5</span><span class="code even" style="--layer: 18" title="bb41: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:12-28:60: Assign: _31 = const false
+    28:12-28:60: Goto: goto -&gt; bb43"><span class="annotation">@41:</span>  || countdown != 9</span><span class="code even" style="--layer: 12" title="bb49: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    28:9-30:10: Assign: _30 = const ()
+    28:9-30:10: Goto: goto -&gt; bb51"><span class="annotation">@49:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 12" title="bb49: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    28:9-30:10: Assign: _30 = const ()
+    28:9-30:10: Goto: goto -&gt; bb51">            countdown = 0;</span></span>
+<span class="line"><span class="code even" style="--layer: 12" title="bb49: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    28:9-30:10: Assign: _30 = const ()
+    28:9-30:10: Goto: goto -&gt; bb51">        </span><span class="code odd" style="--layer: 13" title="bb51: ../instrument-coverage/coverage_of_if_else.rs:30:9: 31:23:
+    30:9-30:10: StorageDead: StorageDead(_31)
+    30:9-30:10: StorageDead: StorageDead(_30)
+    31:9-31:23: Assign: _39 = CheckedSub(_21, const 5_i32)
+    31:9-31:23: Assert: assert(!move (_39.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _21, const 5_i32) -&gt; [success: bb52, unwind: bb1]"><span class="annotation">@51:</span> }</span></span>
+<span class="line"><span class="code odd" style="--layer: 13" title="bb51: ../instrument-coverage/coverage_of_if_else.rs:30:9: 31:23:
+    30:9-30:10: StorageDead: StorageDead(_31)
+    30:9-30:10: StorageDead: StorageDead(_30)
+    31:9-31:23: Assign: _39 = CheckedSub(_21, const 5_i32)
+    31:9-31:23: Assert: assert(!move (_39.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _21, const 5_i32) -&gt; [success: bb52, unwind: bb1]">        countdown -= 5</span><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]"><span class="annotation">@37:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]">    } else {</span></span>
+<span class="line"><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]">        </span><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27"><span class="annotation">@38:</span> return;</span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27">    }</span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27"></span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27">    let mut countdown = 0;</span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27">    </span><span class="code even" style="--layer: 11" title="bb56: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    38:9-38:23: Assign: _41 = const 10_i32
+    37:13-39:6: Assign: _42 = const ()
+    37:5-39:6: Goto: goto -&gt; bb57"><span class="annotation">@56</span></span><span class="code even" style="--layer: 12" title="bb54: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    37:5-39:6: FalseEdge: falseEdge -&gt; [real: bb56, imaginary: bb55]"><span class="annotation">@54</span></span><span class="code even" style="--layer: 13" title="bb55: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    37:5-39:6: Assign: _42 = const ()
+    37:5-39:6: Goto: goto -&gt; bb57"><span class="annotation">@55:</span> if </span><span class="code even" style="--layer: 14" title="bb53: ../instrument-coverage/coverage_of_if_else.rs:37:8: 37:12:
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    36:9-36:22: StorageLive: StorageLive(_41)
+    36:25-36:26: Assign: _41 = const 0_i32
+    36:9-36:22: FakeRead: FakeRead(ForLet, _41)
+    37:5-39:6: StorageLive: StorageLive(_42)
+    37:8-37:12: StorageLive: StorageLive(_43)
+    37:8-37:12: Assign: _43 = const true
+    37:8-37:12: FakeRead: FakeRead(ForMatchedPlace, _43)
+    37:5-39:6: SwitchInt: switchInt(_43) -&gt; [false: bb55, otherwise: bb54]"><span class="annotation">@53:</span> true</span><span class="code even" style="--layer: 13" title="bb55: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    37:5-39:6: Assign: _42 = const ()
+    37:5-39:6: Goto: goto -&gt; bb57"><span class="annotation">@55:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 13" title="bb55: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    37:5-39:6: Assign: _42 = const ()
+    37:5-39:6: Goto: goto -&gt; bb57">        countdown = 10;</span></span>
+<span class="line"><span class="code even" style="--layer: 13" title="bb55: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    37:5-39:6: Assign: _42 = const ()
+    37:5-39:6: Goto: goto -&gt; bb57">    }</span><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27"><span class="annotation">@38:</span> </span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27"></span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27">    </span><span class="code odd" style="--layer: 11" title="bb61: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    42:9-42:23: Assign: _41 = move (_46.0: i32)
+    41:22-43:6: Assign: _0 = const ()
+    41:5-50:6: Goto: goto -&gt; bb78"><span class="annotation">@61</span></span><span class="code even" style="--layer: 12" title="bb58: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    41:5-50:6: FalseEdge: falseEdge -&gt; [real: bb60, imaginary: bb59]"><span class="annotation">@58</span></span><span class="code even" style="--layer: 13" title="bb77: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    47:9-47:23: Assign: _41 = move (_58.0: i32)
+    43:29-48:6: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    41:5-50:6: Goto: goto -&gt; bb78"><span class="annotation">@77:</span> if </span><span class="code even" style="--layer: 14" title="bb57: ../instrument-coverage/coverage_of_if_else.rs:41:8: 41:21:
+    39:5-39:6: StorageDead: StorageDead(_43)
+    39:5-39:6: StorageDead: StorageDead(_42)
+    41:8-41:21: StorageLive: StorageLive(_44)
+    41:8-41:17: StorageLive: StorageLive(_45)
+    41:8-41:17: Assign: _45 = _41
+    41:8-41:21: Assign: _44 = Gt(move _45, const 7_i32)
+    41:20-41:21: StorageDead: StorageDead(_45)
+    41:8-41:21: FakeRead: FakeRead(ForMatchedPlace, _44)
+    41:5-50:6: SwitchInt: switchInt(_44) -&gt; [false: bb59, otherwise: bb58]"><span class="annotation">@57:</span> countdown &gt; 7</span><span class="code even" style="--layer: 13" title="bb77: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    47:9-47:23: Assign: _41 = move (_58.0: i32)
+    43:29-48:6: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    41:5-50:6: Goto: goto -&gt; bb78"><span class="annotation">@77:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 13" title="bb77: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    47:9-47:23: Assign: _41 = move (_58.0: i32)
+    43:29-48:6: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    41:5-50:6: Goto: goto -&gt; bb78">        </span><span class="code odd" style="--layer: 14" title="bb60: ../instrument-coverage/coverage_of_if_else.rs:42:9: 42:23:
+    42:9-42:23: Assign: _46 = CheckedSub(_41, const 4_i32)
+    42:9-42:23: Assert: assert(!move (_46.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _41, const 4_i32) -&gt; [success: bb61, unwind: bb1]"><span class="annotation">@60:</span> countdown -= 4</span><span class="code even" style="--layer: 13" title="bb77: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    47:9-47:23: Assign: _41 = move (_58.0: i32)
+    43:29-48:6: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    41:5-50:6: Goto: goto -&gt; bb78"><span class="annotation">@77:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 13" title="bb77: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    47:9-47:23: Assign: _41 = move (_58.0: i32)
+    43:29-48:6: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    41:5-50:6: Goto: goto -&gt; bb78">    } else </span><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]"><span class="annotation">@62:</span> if </span><span class="code even" style="--layer: 15" title="bb59: ../instrument-coverage/coverage_of_if_else.rs:43:15: 43:28:
+    43:15-43:28: StorageLive: StorageLive(_47)
+    43:15-43:24: StorageLive: StorageLive(_48)
+    43:15-43:24: Assign: _48 = _41
+    43:15-43:28: Assign: _47 = Gt(move _48, const 2_i32)
+    43:27-43:28: StorageDead: StorageDead(_48)
+    43:15-43:28: FakeRead: FakeRead(ForMatchedPlace, _47)
+    43:12-50:6: SwitchInt: switchInt(_47) -&gt; [false: bb63, otherwise: bb62]"><span class="annotation">@59:</span> countdown &gt; 2</span><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]"><span class="annotation">@62:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]">        </span><span class="code odd" style="--layer: 15" title="bb75: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    45:13-45:26: Assign: _41 = const 0_i32
+    44:61-46:10: Assign: _49 = const ()
+    44:9-46:10: Goto: goto -&gt; bb76"><span class="annotation">@75</span></span><span class="code even" style="--layer: 16" title="bb74: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    44:9-46:10: Assign: _49 = const ()
+    44:9-46:10: Goto: goto -&gt; bb76"><span class="annotation">@74</span></span><span class="code even" style="--layer: 17" title="bb73: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    44:9-46:10: FalseEdge: falseEdge -&gt; [real: bb75, imaginary: bb74]"><span class="annotation">@73:</span> if </span><span class="code even" style="--layer: 18" title="bb67: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:46-44:60: StorageLive: StorageLive(_56)
+    44:46-44:55: StorageLive: StorageLive(_57)
+    44:46-44:55: Assign: _57 = _41
+    44:46-44:60: Assign: _56 = Ne(move _57, const 9_i32)
+    44:59-44:60: StorageDead: StorageDead(_57)
+    44:12-44:60: SwitchInt: switchInt(move _56) -&gt; [false: bb66, otherwise: bb65]"><span class="annotation">@67</span></span><span class="code even" style="--layer: 19" title="bb68: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:59-44:60: StorageDead: StorageDead(_56)
+    44:59-44:60: StorageDead: StorageDead(_51)
+    44:12-44:60: FakeRead: FakeRead(ForMatchedPlace, _50)
+    44:9-46:10: SwitchInt: switchInt(_50) -&gt; [false: bb74, otherwise: bb73]"><span class="annotation">@68</span></span><span class="code even" style="--layer: 20" title="bb65: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:12-44:60: Assign: _50 = const true
+    44:12-44:60: Goto: goto -&gt; bb68"><span class="annotation">@65</span></span><span class="code even" style="--layer: 21" title="bb72: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:41-44:42: StorageDead: StorageDead(_54)
+    44:41-44:42: StorageDead: StorageDead(_52)
+    44:12-44:60: SwitchInt: switchInt(move _51) -&gt; [false: bb67, otherwise: bb65]"><span class="annotation">@72</span></span><span class="code even" style="--layer: 22" title="bb64: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:9-46:10: StorageLive: StorageLive(_49)
+    44:12-44:60: StorageLive: StorageLive(_50)
+    44:12-44:42: StorageLive: StorageLive(_51)
+    44:12-44:25: StorageLive: StorageLive(_52)
+    44:12-44:21: StorageLive: StorageLive(_53)
+    44:12-44:21: Assign: _53 = _41
+    44:12-44:25: Assign: _52 = Lt(move _53, const 1_i32)
+    44:24-44:25: StorageDead: StorageDead(_53)
+    44:12-44:42: SwitchInt: switchInt(move _52) -&gt; [false: bb71, otherwise: bb69]"><span class="annotation">@64</span></span><span class="code even" style="--layer: 23" title="bb66: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:12-44:60: Assign: _50 = const false
+    44:12-44:60: Goto: goto -&gt; bb68"><span class="annotation">@66</span></span><span class="code even" style="--layer: 24" title="bb69: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:42:
+    44:12-44:42: Assign: _51 = const true
+    44:12-44:42: Goto: goto -&gt; bb72"><span class="annotation">@69</span></span><span class="code even" style="--layer: 25" title="bb71: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:42:
+    44:29-44:42: StorageLive: StorageLive(_54)
+    44:29-44:38: StorageLive: StorageLive(_55)
+    44:29-44:38: Assign: _55 = _41
+    44:29-44:42: Assign: _54 = Gt(move _55, const 5_i32)
+    44:41-44:42: StorageDead: StorageDead(_55)
+    44:12-44:42: SwitchInt: switchInt(move _54) -&gt; [false: bb70, otherwise: bb69]"><span class="annotation">@71</span></span><span class="code even" style="--layer: 26" title="bb70: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:42:
+    44:12-44:42: Assign: _51 = const false
+    44:12-44:42: Goto: goto -&gt; bb72"><span class="annotation">@70:</span> countdown &lt; 1 || countdown &gt; 5</span><span class="code even" style="--layer: 23" title="bb66: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:12-44:60: Assign: _50 = const false
+    44:12-44:60: Goto: goto -&gt; bb68"><span class="annotation">@66:</span>  || countdown != 9</span><span class="code even" style="--layer: 17" title="bb73: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    44:9-46:10: FalseEdge: falseEdge -&gt; [real: bb75, imaginary: bb74]"><span class="annotation">@73:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 17" title="bb73: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    44:9-46:10: FalseEdge: falseEdge -&gt; [real: bb75, imaginary: bb74]">            countdown = 0;</span></span>
+<span class="line"><span class="code even" style="--layer: 17" title="bb73: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    44:9-46:10: FalseEdge: falseEdge -&gt; [real: bb75, imaginary: bb74]">        </span><span class="code odd" style="--layer: 18" title="bb76: ../instrument-coverage/coverage_of_if_else.rs:46:9: 47:23:
+    46:9-46:10: StorageDead: StorageDead(_50)
+    46:9-46:10: StorageDead: StorageDead(_49)
+    47:9-47:23: Assign: _58 = CheckedSub(_41, const 5_i32)
+    47:9-47:23: Assert: assert(!move (_58.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _41, const 5_i32) -&gt; [success: bb77, unwind: bb1]"><span class="annotation">@76:</span> }</span></span>
+<span class="line"><span class="code odd" style="--layer: 18" title="bb76: ../instrument-coverage/coverage_of_if_else.rs:46:9: 47:23:
+    46:9-46:10: StorageDead: StorageDead(_50)
+    46:9-46:10: StorageDead: StorageDead(_49)
+    47:9-47:23: Assign: _58 = CheckedSub(_41, const 5_i32)
+    47:9-47:23: Assert: assert(!move (_58.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _41, const 5_i32) -&gt; [success: bb77, unwind: bb1]">        countdown -= 5</span><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]"><span class="annotation">@62:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]">    } else {</span></span>
+<span class="line"><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]">        </span><span class="code even" style="--layer: 15" title="bb63: ../instrument-coverage/coverage_of_if_else.rs:49:9: 51:2:
+    49:9-49:15: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    51:1-51:2: StorageDead: StorageDead(_41)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    51:1-51:2: StorageDead: StorageDead(_1)
+    51:1-51:2: StorageDead: StorageDead(_44)
+    49:9-49:15: Goto: goto -&gt; bb26"><span class="annotation">@63:</span> return;</span></span>
+<span class="line"><span class="code even" style="--layer: 15" title="bb63: ../instrument-coverage/coverage_of_if_else.rs:49:9: 51:2:
+    49:9-49:15: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    51:1-51:2: StorageDead: StorageDead(_41)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    51:1-51:2: StorageDead: StorageDead(_1)
+    51:1-51:2: StorageDead: StorageDead(_44)
+    49:9-49:15: Goto: goto -&gt; bb26">    }</span><span class="code even" style="--layer: 16" title="bb78: ../instrument-coverage/coverage_of_if_else.rs:51:1: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_41)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    51:1-51:2: StorageDead: StorageDead(_1)
+    51:1-51:2: StorageDead: StorageDead(_44)
+    51:2-51:2: Goto: goto -&gt; bb26"><span class="annotation">@78:</span> }</span><span><span class="code even" style="--layer: 1" title="bb26: ../instrument-coverage/coverage_of_if_else.rs:51:2: 51:2:
+    51:2-51:2: Return: return"><span class="annotation">@26</span></span></span></span></div>
+</body>
+</html>
diff --git a/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-link-dead-code/Makefile b/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-link-dead-code/Makefile
new file mode 100644
index 00000000000..0578949b3c8
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-link-dead-code/Makefile
@@ -0,0 +1,11 @@
+# needs-profiler-support
+# ignore-msvc
+
+# LINK_DEAD_CODE requires ignore-msvc due to Issue #76038
+LINK_DEAD_CODE=yes
+
+-include ../instrument-coverage-mir-cov-html-base/Makefile
+
+# ISSUE(76038): When targeting MSVC, Rust binaries built with both `-Z instrument-coverage` and
+# `-C link-dead-code` typically crash (with a seg-fault) or at best generate an empty `*.profraw`.
+# See ../instrument-coverage/coverage_tools.mk for more information.
\ No newline at end of file
diff --git a/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-link-dead-code/expected_mir_dump.coverage_of_if_else/coverage_of_if_else.main.-------.InstrumentCoverage.0.html b/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-link-dead-code/expected_mir_dump.coverage_of_if_else/coverage_of_if_else.main.-------.InstrumentCoverage.0.html
new file mode 100644
index 00000000000..faa5d65e7e7
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage-mir-cov-html-link-dead-code/expected_mir_dump.coverage_of_if_else/coverage_of_if_else.main.-------.InstrumentCoverage.0.html
@@ -0,0 +1,583 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>coverage_of_if_else - Code Regions</title>
+    <style>
+    .line {
+        counter-increment: line;
+    }
+    .line:before {
+        content: counter(line) ": ";
+        font-family: Menlo, Monaco, monospace;
+        font-style: italic;
+        width: 3.8em;
+        display: inline-block;
+        text-align: right;
+        filter: opacity(50%);
+        -webkit-user-select: none;
+    }
+    .code {
+        color: #dddddd;
+        background-color: #222222;
+        font-family: Menlo, Monaco, monospace;
+        line-height: 1.4em;
+        border-bottom: 2px solid #222222;
+        white-space: pre;
+        display: inline-block;
+    }
+    .odd {
+        background-color: #55bbff;
+        color: #223311;
+    }
+    .even {
+        background-color: #ee7756;
+        color: #551133;
+    }
+    .code {
+        --index: calc(var(--layer) - 1);
+        padding-top: calc(var(--index) * 0.15em);
+        filter:
+            hue-rotate(calc(var(--index) * 25deg))
+            saturate(calc(100% - (var(--index) * 2%)))
+            brightness(calc(100% - (var(--index) * 1.5%)));
+    }
+    .annotation {
+        color: #4444ff;
+        font-family: monospace;
+        font-style: italic;
+        display: none;
+        -webkit-user-select: none;
+    }
+    body:active .annotation {
+        /* requires holding mouse down anywhere on the page */
+        display: inline-block;
+    }
+    span:hover .annotation {
+        /* requires hover over a span ONLY on its first line */
+        display: inline-block;
+    }
+    </style>
+</head>
+<body>
+<div class="code" style="counter-reset: line 2"><span class="line"><span class="code" style="--layer: 0">fn main() {</span></span>
+<span class="line"><span class="code" style="--layer: 0">    let mut countdown = 0;</span></span>
+<span class="line"><span class="code" style="--layer: 0">    </span><span><span class="code even" style="--layer: 1" title="bb2: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    5:5-7:6: FalseEdge: falseEdge -&gt; [real: bb4, imaginary: bb3]"><span class="annotation">@2</span></span></span><span class="code even" style="--layer: 2" title="bb4: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    6:9-6:23: Assign: _1 = const 10_i32
+    5:13-7:6: Assign: _2 = const ()
+    5:5-7:6: Goto: goto -&gt; bb5"><span class="annotation">@4</span></span><span class="code even" style="--layer: 3" title="bb3: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    5:5-7:6: Assign: _2 = const ()
+    5:5-7:6: Goto: goto -&gt; bb5"><span class="annotation">@3:</span> if </span><span class="code even" style="--layer: 4" title="bb0: ../instrument-coverage/coverage_of_if_else.rs:5:8: 5:12:
+    4:9-4:22: StorageLive: StorageLive(_1)
+    4:25-4:26: Assign: _1 = const 0_i32
+    4:9-4:22: FakeRead: FakeRead(ForLet, _1)
+    5:5-7:6: StorageLive: StorageLive(_2)
+    5:8-5:12: StorageLive: StorageLive(_3)
+    5:8-5:12: Assign: _3 = const true
+    5:8-5:12: FakeRead: FakeRead(ForMatchedPlace, _3)
+    5:5-7:6: SwitchInt: switchInt(_3) -&gt; [false: bb3, otherwise: bb2]"><span class="annotation">@0:</span> true</span><span class="code even" style="--layer: 3" title="bb3: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    5:5-7:6: Assign: _2 = const ()
+    5:5-7:6: Goto: goto -&gt; bb5"><span class="annotation">@3:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 3" title="bb3: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    5:5-7:6: Assign: _2 = const ()
+    5:5-7:6: Goto: goto -&gt; bb5">        countdown = 10;</span></span>
+<span class="line"><span class="code even" style="--layer: 3" title="bb3: ../instrument-coverage/coverage_of_if_else.rs:5:5: 7:6:
+    5:5-7:6: Assign: _2 = const ()
+    5:5-7:6: Goto: goto -&gt; bb5">    }</span><span class="code" style="--layer: 0"></span></span>
+<span class="line"><span class="code" style="--layer: 0"></span></span>
+<span class="line"><span class="code" style="--layer: 0">    </span><span><span class="code even" style="--layer: 1" title="bb6: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    9:5-18:6: FalseEdge: falseEdge -&gt; [real: bb8, imaginary: bb7]"><span class="annotation">@6</span></span></span><span class="code even" style="--layer: 2" title="bb9: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    10:9-10:23: Assign: _1 = move (_7.0: i32)
+    9:22-11:6: Assign: _4 = const ()
+    9:5-18:6: Goto: goto -&gt; bb28"><span class="annotation">@9</span></span><span class="code even" style="--layer: 3" title="bb25: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    15:9-15:23: Assign: _1 = move (_19.0: i32)
+    11:29-16:6: Assign: _4 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    9:5-18:6: Goto: goto -&gt; bb28"><span class="annotation">@25:</span> if </span><span class="code even" style="--layer: 4" title="bb5: ../instrument-coverage/coverage_of_if_else.rs:9:8: 9:21:
+    7:5-7:6: StorageDead: StorageDead(_3)
+    7:5-7:6: StorageDead: StorageDead(_2)
+    9:5-18:6: StorageLive: StorageLive(_4)
+    9:8-9:21: StorageLive: StorageLive(_5)
+    9:8-9:17: StorageLive: StorageLive(_6)
+    9:8-9:17: Assign: _6 = _1
+    9:8-9:21: Assign: _5 = Gt(move _6, const 7_i32)
+    9:20-9:21: StorageDead: StorageDead(_6)
+    9:8-9:21: FakeRead: FakeRead(ForMatchedPlace, _5)
+    9:5-18:6: SwitchInt: switchInt(_5) -&gt; [false: bb7, otherwise: bb6]"><span class="annotation">@5:</span> countdown &gt; 7</span><span class="code even" style="--layer: 3" title="bb25: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    15:9-15:23: Assign: _1 = move (_19.0: i32)
+    11:29-16:6: Assign: _4 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    9:5-18:6: Goto: goto -&gt; bb28"><span class="annotation">@25:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 3" title="bb25: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    15:9-15:23: Assign: _1 = move (_19.0: i32)
+    11:29-16:6: Assign: _4 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    9:5-18:6: Goto: goto -&gt; bb28">        </span><span class="code odd" style="--layer: 4" title="bb8: ../instrument-coverage/coverage_of_if_else.rs:10:9: 10:23:
+    10:9-10:23: Assign: _7 = CheckedSub(_1, const 4_i32)
+    10:9-10:23: Assert: assert(!move (_7.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _1, const 4_i32) -&gt; [success: bb9, unwind: bb1]"><span class="annotation">@8:</span> countdown -= 4</span><span class="code even" style="--layer: 3" title="bb25: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    15:9-15:23: Assign: _1 = move (_19.0: i32)
+    11:29-16:6: Assign: _4 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    9:5-18:6: Goto: goto -&gt; bb28"><span class="annotation">@25:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 3" title="bb25: ../instrument-coverage/coverage_of_if_else.rs:9:5: 18:6:
+    15:9-15:23: Assign: _1 = move (_19.0: i32)
+    11:29-16:6: Assign: _4 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    9:5-18:6: Goto: goto -&gt; bb28">    } else </span><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]"><span class="annotation">@10:</span> if </span><span class="code even" style="--layer: 5" title="bb7: ../instrument-coverage/coverage_of_if_else.rs:11:15: 11:28:
+    11:15-11:28: StorageLive: StorageLive(_8)
+    11:15-11:24: StorageLive: StorageLive(_9)
+    11:15-11:24: Assign: _9 = _1
+    11:15-11:28: Assign: _8 = Gt(move _9, const 2_i32)
+    11:27-11:28: StorageDead: StorageDead(_9)
+    11:15-11:28: FakeRead: FakeRead(ForMatchedPlace, _8)
+    11:12-18:6: SwitchInt: switchInt(_8) -&gt; [false: bb11, otherwise: bb10]"><span class="annotation">@7:</span> countdown &gt; 2</span><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]"><span class="annotation">@10:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]">        </span><span class="code odd" style="--layer: 5" title="bb22: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    12:9-14:10: Assign: _10 = const ()
+    12:9-14:10: Goto: goto -&gt; bb24"><span class="annotation">@22</span></span><span class="code even" style="--layer: 6" title="bb23: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    13:13-13:26: Assign: _1 = const 0_i32
+    12:61-14:10: Assign: _10 = const ()
+    12:9-14:10: Goto: goto -&gt; bb24"><span class="annotation">@23</span></span><span class="code even" style="--layer: 7" title="bb21: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    12:9-14:10: FalseEdge: falseEdge -&gt; [real: bb23, imaginary: bb22]"><span class="annotation">@21:</span> if </span><span class="code even" style="--layer: 8" title="bb14: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:12-12:60: Assign: _11 = const false
+    12:12-12:60: Goto: goto -&gt; bb16"><span class="annotation">@14</span></span><span class="code even" style="--layer: 9" title="bb15: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:46-12:60: StorageLive: StorageLive(_17)
+    12:46-12:55: StorageLive: StorageLive(_18)
+    12:46-12:55: Assign: _18 = _1
+    12:46-12:60: Assign: _17 = Ne(move _18, const 9_i32)
+    12:59-12:60: StorageDead: StorageDead(_18)
+    12:12-12:60: SwitchInt: switchInt(move _17) -&gt; [false: bb14, otherwise: bb13]"><span class="annotation">@15</span></span><span class="code even" style="--layer: 10" title="bb16: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:59-12:60: StorageDead: StorageDead(_17)
+    12:59-12:60: StorageDead: StorageDead(_12)
+    12:12-12:60: FakeRead: FakeRead(ForMatchedPlace, _11)
+    12:9-14:10: SwitchInt: switchInt(_11) -&gt; [false: bb22, otherwise: bb21]"><span class="annotation">@16</span></span><span class="code even" style="--layer: 11" title="bb13: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:12-12:60: Assign: _11 = const true
+    12:12-12:60: Goto: goto -&gt; bb16"><span class="annotation">@13</span></span><span class="code even" style="--layer: 12" title="bb20: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:41-12:42: StorageDead: StorageDead(_15)
+    12:41-12:42: StorageDead: StorageDead(_13)
+    12:12-12:60: SwitchInt: switchInt(move _12) -&gt; [false: bb15, otherwise: bb13]"><span class="annotation">@20</span></span><span class="code even" style="--layer: 13" title="bb12: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:9-14:10: StorageLive: StorageLive(_10)
+    12:12-12:60: StorageLive: StorageLive(_11)
+    12:12-12:42: StorageLive: StorageLive(_12)
+    12:12-12:25: StorageLive: StorageLive(_13)
+    12:12-12:21: StorageLive: StorageLive(_14)
+    12:12-12:21: Assign: _14 = _1
+    12:12-12:25: Assign: _13 = Lt(move _14, const 1_i32)
+    12:24-12:25: StorageDead: StorageDead(_14)
+    12:12-12:42: SwitchInt: switchInt(move _13) -&gt; [false: bb19, otherwise: bb17]"><span class="annotation">@12</span></span><span class="code even" style="--layer: 14" title="bb18: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:42:
+    12:12-12:42: Assign: _12 = const false
+    12:12-12:42: Goto: goto -&gt; bb20"><span class="annotation">@18</span></span><span class="code even" style="--layer: 15" title="bb19: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:42:
+    12:29-12:42: StorageLive: StorageLive(_15)
+    12:29-12:38: StorageLive: StorageLive(_16)
+    12:29-12:38: Assign: _16 = _1
+    12:29-12:42: Assign: _15 = Gt(move _16, const 5_i32)
+    12:41-12:42: StorageDead: StorageDead(_16)
+    12:12-12:42: SwitchInt: switchInt(move _15) -&gt; [false: bb18, otherwise: bb17]"><span class="annotation">@19</span></span><span class="code even" style="--layer: 16" title="bb17: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:42:
+    12:12-12:42: Assign: _12 = const true
+    12:12-12:42: Goto: goto -&gt; bb20"><span class="annotation">@17:</span> countdown &lt; 1 || countdown &gt; 5</span><span class="code even" style="--layer: 13" title="bb12: ../instrument-coverage/coverage_of_if_else.rs:12:12: 12:60:
+    12:9-14:10: StorageLive: StorageLive(_10)
+    12:12-12:60: StorageLive: StorageLive(_11)
+    12:12-12:42: StorageLive: StorageLive(_12)
+    12:12-12:25: StorageLive: StorageLive(_13)
+    12:12-12:21: StorageLive: StorageLive(_14)
+    12:12-12:21: Assign: _14 = _1
+    12:12-12:25: Assign: _13 = Lt(move _14, const 1_i32)
+    12:24-12:25: StorageDead: StorageDead(_14)
+    12:12-12:42: SwitchInt: switchInt(move _13) -&gt; [false: bb19, otherwise: bb17]"><span class="annotation">@12:</span>  || countdown != 9</span><span class="code even" style="--layer: 7" title="bb21: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    12:9-14:10: FalseEdge: falseEdge -&gt; [real: bb23, imaginary: bb22]"><span class="annotation">@21:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 7" title="bb21: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    12:9-14:10: FalseEdge: falseEdge -&gt; [real: bb23, imaginary: bb22]">            countdown = 0;</span></span>
+<span class="line"><span class="code even" style="--layer: 7" title="bb21: ../instrument-coverage/coverage_of_if_else.rs:12:9: 14:10:
+    12:9-14:10: FalseEdge: falseEdge -&gt; [real: bb23, imaginary: bb22]">        </span><span class="code odd" style="--layer: 8" title="bb24: ../instrument-coverage/coverage_of_if_else.rs:14:9: 15:23:
+    14:9-14:10: StorageDead: StorageDead(_11)
+    14:9-14:10: StorageDead: StorageDead(_10)
+    15:9-15:23: Assign: _19 = CheckedSub(_1, const 5_i32)
+    15:9-15:23: Assert: assert(!move (_19.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _1, const 5_i32) -&gt; [success: bb25, unwind: bb1]"><span class="annotation">@24:</span> }</span></span>
+<span class="line"><span class="code odd" style="--layer: 8" title="bb24: ../instrument-coverage/coverage_of_if_else.rs:14:9: 15:23:
+    14:9-14:10: StorageDead: StorageDead(_11)
+    14:9-14:10: StorageDead: StorageDead(_10)
+    15:9-15:23: Assign: _19 = CheckedSub(_1, const 5_i32)
+    15:9-15:23: Assert: assert(!move (_19.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _1, const 5_i32) -&gt; [success: bb25, unwind: bb1]">        countdown -= 5</span><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]"><span class="annotation">@10:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]">    } else {</span></span>
+<span class="line"><span class="code even" style="--layer: 4" title="bb10: ../instrument-coverage/coverage_of_if_else.rs:11:12: 18:6:
+    11:12-18:6: FalseEdge: falseEdge -&gt; [real: bb12, imaginary: bb11]">        </span><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26"><span class="annotation">@27</span></span><span class="code even" style="--layer: 6" title="bb11: ../instrument-coverage/coverage_of_if_else.rs:17:9: 18:6:
+    17:9-17:15: Assign: _0 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    18:5-18:6: StorageDead: StorageDead(_5)
+    18:5-18:6: StorageDead: StorageDead(_4)
+    17:9-17:15: Goto: goto -&gt; bb27"><span class="annotation">@11:</span> return;</span></span>
+<span class="line"><span class="code even" style="--layer: 6" title="bb11: ../instrument-coverage/coverage_of_if_else.rs:17:9: 18:6:
+    17:9-17:15: Assign: _0 = const ()
+    18:5-18:6: StorageDead: StorageDead(_8)
+    18:5-18:6: StorageDead: StorageDead(_5)
+    18:5-18:6: StorageDead: StorageDead(_4)
+    17:9-17:15: Goto: goto -&gt; bb27">    }</span><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26"><span class="annotation">@27:</span> </span></span>
+<span class="line"><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26"></span></span>
+<span class="line"><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26">    let mut countdown = 0;</span></span>
+<span class="line"><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26">    </span><span class="code odd" style="--layer: 6" title="bb30: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    21:5-23:6: Assign: _22 = const ()
+    21:5-23:6: Goto: goto -&gt; bb32"><span class="annotation">@30</span></span><span class="code even" style="--layer: 7" title="bb31: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    22:9-22:23: Assign: _21 = const 10_i32
+    21:13-23:6: Assign: _22 = const ()
+    21:5-23:6: Goto: goto -&gt; bb32"><span class="annotation">@31</span></span><span class="code even" style="--layer: 8" title="bb29: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    21:5-23:6: FalseEdge: falseEdge -&gt; [real: bb31, imaginary: bb30]"><span class="annotation">@29:</span> if </span><span class="code even" style="--layer: 9" title="bb28: ../instrument-coverage/coverage_of_if_else.rs:21:8: 21:12:
+    18:5-18:6: StorageDead: StorageDead(_5)
+    18:5-18:6: StorageDead: StorageDead(_4)
+    20:9-20:22: StorageLive: StorageLive(_21)
+    20:25-20:26: Assign: _21 = const 0_i32
+    20:9-20:22: FakeRead: FakeRead(ForLet, _21)
+    21:5-23:6: StorageLive: StorageLive(_22)
+    21:8-21:12: StorageLive: StorageLive(_23)
+    21:8-21:12: Assign: _23 = const true
+    21:8-21:12: FakeRead: FakeRead(ForMatchedPlace, _23)
+    21:5-23:6: SwitchInt: switchInt(_23) -&gt; [false: bb30, otherwise: bb29]"><span class="annotation">@28:</span> true</span><span class="code even" style="--layer: 8" title="bb29: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    21:5-23:6: FalseEdge: falseEdge -&gt; [real: bb31, imaginary: bb30]"><span class="annotation">@29:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 8" title="bb29: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    21:5-23:6: FalseEdge: falseEdge -&gt; [real: bb31, imaginary: bb30]">        countdown = 10;</span></span>
+<span class="line"><span class="code even" style="--layer: 8" title="bb29: ../instrument-coverage/coverage_of_if_else.rs:21:5: 23:6:
+    21:5-23:6: FalseEdge: falseEdge -&gt; [real: bb31, imaginary: bb30]">    }</span><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26"><span class="annotation">@27:</span> </span></span>
+<span class="line"><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26"></span></span>
+<span class="line"><span class="code even" style="--layer: 5" title="bb27: ../instrument-coverage/coverage_of_if_else.rs:17:9: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_1)
+    17:9-17:15: Goto: goto -&gt; bb26">    </span><span class="code even" style="--layer: 6" title="bb33: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    25:5-34:6: FalseEdge: falseEdge -&gt; [real: bb35, imaginary: bb34]"><span class="annotation">@33</span></span><span class="code even" style="--layer: 7" title="bb52: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    31:9-31:23: Assign: _21 = move (_39.0: i32)
+    27:29-32:6: Assign: _24 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    25:5-34:6: Goto: goto -&gt; bb53"><span class="annotation">@52</span></span><span class="code even" style="--layer: 8" title="bb36: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    26:9-26:23: Assign: _21 = move (_27.0: i32)
+    25:22-27:6: Assign: _24 = const ()
+    25:5-34:6: Goto: goto -&gt; bb53"><span class="annotation">@36:</span> if </span><span class="code even" style="--layer: 9" title="bb32: ../instrument-coverage/coverage_of_if_else.rs:25:8: 25:21:
+    23:5-23:6: StorageDead: StorageDead(_23)
+    23:5-23:6: StorageDead: StorageDead(_22)
+    25:5-34:6: StorageLive: StorageLive(_24)
+    25:8-25:21: StorageLive: StorageLive(_25)
+    25:8-25:17: StorageLive: StorageLive(_26)
+    25:8-25:17: Assign: _26 = _21
+    25:8-25:21: Assign: _25 = Gt(move _26, const 7_i32)
+    25:20-25:21: StorageDead: StorageDead(_26)
+    25:8-25:21: FakeRead: FakeRead(ForMatchedPlace, _25)
+    25:5-34:6: SwitchInt: switchInt(_25) -&gt; [false: bb34, otherwise: bb33]"><span class="annotation">@32:</span> countdown &gt; 7</span><span class="code even" style="--layer: 8" title="bb36: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    26:9-26:23: Assign: _21 = move (_27.0: i32)
+    25:22-27:6: Assign: _24 = const ()
+    25:5-34:6: Goto: goto -&gt; bb53"><span class="annotation">@36:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 8" title="bb36: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    26:9-26:23: Assign: _21 = move (_27.0: i32)
+    25:22-27:6: Assign: _24 = const ()
+    25:5-34:6: Goto: goto -&gt; bb53">        </span><span class="code odd" style="--layer: 9" title="bb35: ../instrument-coverage/coverage_of_if_else.rs:26:9: 26:23:
+    26:9-26:23: Assign: _27 = CheckedSub(_21, const 4_i32)
+    26:9-26:23: Assert: assert(!move (_27.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _21, const 4_i32) -&gt; [success: bb36, unwind: bb1]"><span class="annotation">@35:</span> countdown -= 4</span><span class="code even" style="--layer: 8" title="bb36: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    26:9-26:23: Assign: _21 = move (_27.0: i32)
+    25:22-27:6: Assign: _24 = const ()
+    25:5-34:6: Goto: goto -&gt; bb53"><span class="annotation">@36:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 8" title="bb36: ../instrument-coverage/coverage_of_if_else.rs:25:5: 34:6:
+    26:9-26:23: Assign: _21 = move (_27.0: i32)
+    25:22-27:6: Assign: _24 = const ()
+    25:5-34:6: Goto: goto -&gt; bb53">    } else </span><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]"><span class="annotation">@37:</span> if </span><span class="code even" style="--layer: 10" title="bb34: ../instrument-coverage/coverage_of_if_else.rs:27:15: 27:28:
+    27:15-27:28: StorageLive: StorageLive(_28)
+    27:15-27:24: StorageLive: StorageLive(_29)
+    27:15-27:24: Assign: _29 = _21
+    27:15-27:28: Assign: _28 = Gt(move _29, const 2_i32)
+    27:27-27:28: StorageDead: StorageDead(_29)
+    27:15-27:28: FakeRead: FakeRead(ForMatchedPlace, _28)
+    27:12-34:6: SwitchInt: switchInt(_28) -&gt; [false: bb38, otherwise: bb37]"><span class="annotation">@34:</span> countdown &gt; 2</span><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]"><span class="annotation">@37:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]">        </span><span class="code odd" style="--layer: 10" title="bb48: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    28:9-30:10: FalseEdge: falseEdge -&gt; [real: bb50, imaginary: bb49]"><span class="annotation">@48</span></span><span class="code even" style="--layer: 11" title="bb50: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    29:13-29:26: Assign: _21 = const 0_i32
+    28:61-30:10: Assign: _30 = const ()
+    28:9-30:10: Goto: goto -&gt; bb51"><span class="annotation">@50</span></span><span class="code even" style="--layer: 12" title="bb49: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    28:9-30:10: Assign: _30 = const ()
+    28:9-30:10: Goto: goto -&gt; bb51"><span class="annotation">@49:</span> if </span><span class="code even" style="--layer: 13" title="bb39: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:9-30:10: StorageLive: StorageLive(_30)
+    28:12-28:60: StorageLive: StorageLive(_31)
+    28:12-28:42: StorageLive: StorageLive(_32)
+    28:12-28:25: StorageLive: StorageLive(_33)
+    28:12-28:21: StorageLive: StorageLive(_34)
+    28:12-28:21: Assign: _34 = _21
+    28:12-28:25: Assign: _33 = Lt(move _34, const 1_i32)
+    28:24-28:25: StorageDead: StorageDead(_34)
+    28:12-28:42: SwitchInt: switchInt(move _33) -&gt; [false: bb46, otherwise: bb44]"><span class="annotation">@39</span></span><span class="code even" style="--layer: 14" title="bb47: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:41-28:42: StorageDead: StorageDead(_35)
+    28:41-28:42: StorageDead: StorageDead(_33)
+    28:12-28:60: SwitchInt: switchInt(move _32) -&gt; [false: bb42, otherwise: bb40]"><span class="annotation">@47</span></span><span class="code even" style="--layer: 15" title="bb40: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:12-28:60: Assign: _31 = const true
+    28:12-28:60: Goto: goto -&gt; bb43"><span class="annotation">@40</span></span><span class="code even" style="--layer: 16" title="bb43: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:59-28:60: StorageDead: StorageDead(_37)
+    28:59-28:60: StorageDead: StorageDead(_32)
+    28:12-28:60: FakeRead: FakeRead(ForMatchedPlace, _31)
+    28:9-30:10: SwitchInt: switchInt(_31) -&gt; [false: bb49, otherwise: bb48]"><span class="annotation">@43</span></span><span class="code even" style="--layer: 17" title="bb42: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:46-28:60: StorageLive: StorageLive(_37)
+    28:46-28:55: StorageLive: StorageLive(_38)
+    28:46-28:55: Assign: _38 = _21
+    28:46-28:60: Assign: _37 = Ne(move _38, const 9_i32)
+    28:59-28:60: StorageDead: StorageDead(_38)
+    28:12-28:60: SwitchInt: switchInt(move _37) -&gt; [false: bb41, otherwise: bb40]"><span class="annotation">@42</span></span><span class="code even" style="--layer: 18" title="bb41: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:12-28:60: Assign: _31 = const false
+    28:12-28:60: Goto: goto -&gt; bb43"><span class="annotation">@41</span></span><span class="code even" style="--layer: 19" title="bb46: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:42:
+    28:29-28:42: StorageLive: StorageLive(_35)
+    28:29-28:38: StorageLive: StorageLive(_36)
+    28:29-28:38: Assign: _36 = _21
+    28:29-28:42: Assign: _35 = Gt(move _36, const 5_i32)
+    28:41-28:42: StorageDead: StorageDead(_36)
+    28:12-28:42: SwitchInt: switchInt(move _35) -&gt; [false: bb45, otherwise: bb44]"><span class="annotation">@46</span></span><span class="code even" style="--layer: 20" title="bb45: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:42:
+    28:12-28:42: Assign: _32 = const false
+    28:12-28:42: Goto: goto -&gt; bb47"><span class="annotation">@45</span></span><span class="code even" style="--layer: 21" title="bb44: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:42:
+    28:12-28:42: Assign: _32 = const true
+    28:12-28:42: Goto: goto -&gt; bb47"><span class="annotation">@44:</span> countdown &lt; 1 || countdown &gt; 5</span><span class="code even" style="--layer: 18" title="bb41: ../instrument-coverage/coverage_of_if_else.rs:28:12: 28:60:
+    28:12-28:60: Assign: _31 = const false
+    28:12-28:60: Goto: goto -&gt; bb43"><span class="annotation">@41:</span>  || countdown != 9</span><span class="code even" style="--layer: 12" title="bb49: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    28:9-30:10: Assign: _30 = const ()
+    28:9-30:10: Goto: goto -&gt; bb51"><span class="annotation">@49:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 12" title="bb49: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    28:9-30:10: Assign: _30 = const ()
+    28:9-30:10: Goto: goto -&gt; bb51">            countdown = 0;</span></span>
+<span class="line"><span class="code even" style="--layer: 12" title="bb49: ../instrument-coverage/coverage_of_if_else.rs:28:9: 30:10:
+    28:9-30:10: Assign: _30 = const ()
+    28:9-30:10: Goto: goto -&gt; bb51">        </span><span class="code odd" style="--layer: 13" title="bb51: ../instrument-coverage/coverage_of_if_else.rs:30:9: 31:23:
+    30:9-30:10: StorageDead: StorageDead(_31)
+    30:9-30:10: StorageDead: StorageDead(_30)
+    31:9-31:23: Assign: _39 = CheckedSub(_21, const 5_i32)
+    31:9-31:23: Assert: assert(!move (_39.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _21, const 5_i32) -&gt; [success: bb52, unwind: bb1]"><span class="annotation">@51:</span> }</span></span>
+<span class="line"><span class="code odd" style="--layer: 13" title="bb51: ../instrument-coverage/coverage_of_if_else.rs:30:9: 31:23:
+    30:9-30:10: StorageDead: StorageDead(_31)
+    30:9-30:10: StorageDead: StorageDead(_30)
+    31:9-31:23: Assign: _39 = CheckedSub(_21, const 5_i32)
+    31:9-31:23: Assert: assert(!move (_39.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _21, const 5_i32) -&gt; [success: bb52, unwind: bb1]">        countdown -= 5</span><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]"><span class="annotation">@37:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]">    } else {</span></span>
+<span class="line"><span class="code even" style="--layer: 9" title="bb37: ../instrument-coverage/coverage_of_if_else.rs:27:12: 34:6:
+    27:12-34:6: FalseEdge: falseEdge -&gt; [real: bb39, imaginary: bb38]">        </span><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27"><span class="annotation">@38:</span> return;</span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27">    }</span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27"></span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27">    let mut countdown = 0;</span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27">    </span><span class="code even" style="--layer: 11" title="bb56: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    38:9-38:23: Assign: _41 = const 10_i32
+    37:13-39:6: Assign: _42 = const ()
+    37:5-39:6: Goto: goto -&gt; bb57"><span class="annotation">@56</span></span><span class="code even" style="--layer: 12" title="bb54: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    37:5-39:6: FalseEdge: falseEdge -&gt; [real: bb56, imaginary: bb55]"><span class="annotation">@54</span></span><span class="code even" style="--layer: 13" title="bb55: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    37:5-39:6: Assign: _42 = const ()
+    37:5-39:6: Goto: goto -&gt; bb57"><span class="annotation">@55:</span> if </span><span class="code even" style="--layer: 14" title="bb53: ../instrument-coverage/coverage_of_if_else.rs:37:8: 37:12:
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    36:9-36:22: StorageLive: StorageLive(_41)
+    36:25-36:26: Assign: _41 = const 0_i32
+    36:9-36:22: FakeRead: FakeRead(ForLet, _41)
+    37:5-39:6: StorageLive: StorageLive(_42)
+    37:8-37:12: StorageLive: StorageLive(_43)
+    37:8-37:12: Assign: _43 = const true
+    37:8-37:12: FakeRead: FakeRead(ForMatchedPlace, _43)
+    37:5-39:6: SwitchInt: switchInt(_43) -&gt; [false: bb55, otherwise: bb54]"><span class="annotation">@53:</span> true</span><span class="code even" style="--layer: 13" title="bb55: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    37:5-39:6: Assign: _42 = const ()
+    37:5-39:6: Goto: goto -&gt; bb57"><span class="annotation">@55:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 13" title="bb55: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    37:5-39:6: Assign: _42 = const ()
+    37:5-39:6: Goto: goto -&gt; bb57">        countdown = 10;</span></span>
+<span class="line"><span class="code even" style="--layer: 13" title="bb55: ../instrument-coverage/coverage_of_if_else.rs:37:5: 39:6:
+    37:5-39:6: Assign: _42 = const ()
+    37:5-39:6: Goto: goto -&gt; bb57">    }</span><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27"><span class="annotation">@38:</span> </span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27"></span></span>
+<span class="line"><span class="code even" style="--layer: 10" title="bb38: ../instrument-coverage/coverage_of_if_else.rs:33:9: 51:2:
+    33:9-33:15: Assign: _0 = const ()
+    34:5-34:6: StorageDead: StorageDead(_28)
+    34:5-34:6: StorageDead: StorageDead(_25)
+    34:5-34:6: StorageDead: StorageDead(_24)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    33:9-33:15: Goto: goto -&gt; bb27">    </span><span class="code odd" style="--layer: 11" title="bb61: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    42:9-42:23: Assign: _41 = move (_46.0: i32)
+    41:22-43:6: Assign: _0 = const ()
+    41:5-50:6: Goto: goto -&gt; bb78"><span class="annotation">@61</span></span><span class="code even" style="--layer: 12" title="bb58: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    41:5-50:6: FalseEdge: falseEdge -&gt; [real: bb60, imaginary: bb59]"><span class="annotation">@58</span></span><span class="code even" style="--layer: 13" title="bb77: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    47:9-47:23: Assign: _41 = move (_58.0: i32)
+    43:29-48:6: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    41:5-50:6: Goto: goto -&gt; bb78"><span class="annotation">@77:</span> if </span><span class="code even" style="--layer: 14" title="bb57: ../instrument-coverage/coverage_of_if_else.rs:41:8: 41:21:
+    39:5-39:6: StorageDead: StorageDead(_43)
+    39:5-39:6: StorageDead: StorageDead(_42)
+    41:8-41:21: StorageLive: StorageLive(_44)
+    41:8-41:17: StorageLive: StorageLive(_45)
+    41:8-41:17: Assign: _45 = _41
+    41:8-41:21: Assign: _44 = Gt(move _45, const 7_i32)
+    41:20-41:21: StorageDead: StorageDead(_45)
+    41:8-41:21: FakeRead: FakeRead(ForMatchedPlace, _44)
+    41:5-50:6: SwitchInt: switchInt(_44) -&gt; [false: bb59, otherwise: bb58]"><span class="annotation">@57:</span> countdown &gt; 7</span><span class="code even" style="--layer: 13" title="bb77: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    47:9-47:23: Assign: _41 = move (_58.0: i32)
+    43:29-48:6: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    41:5-50:6: Goto: goto -&gt; bb78"><span class="annotation">@77:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 13" title="bb77: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    47:9-47:23: Assign: _41 = move (_58.0: i32)
+    43:29-48:6: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    41:5-50:6: Goto: goto -&gt; bb78">        </span><span class="code odd" style="--layer: 14" title="bb60: ../instrument-coverage/coverage_of_if_else.rs:42:9: 42:23:
+    42:9-42:23: Assign: _46 = CheckedSub(_41, const 4_i32)
+    42:9-42:23: Assert: assert(!move (_46.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _41, const 4_i32) -&gt; [success: bb61, unwind: bb1]"><span class="annotation">@60:</span> countdown -= 4</span><span class="code even" style="--layer: 13" title="bb77: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    47:9-47:23: Assign: _41 = move (_58.0: i32)
+    43:29-48:6: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    41:5-50:6: Goto: goto -&gt; bb78"><span class="annotation">@77:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 13" title="bb77: ../instrument-coverage/coverage_of_if_else.rs:41:5: 50:6:
+    47:9-47:23: Assign: _41 = move (_58.0: i32)
+    43:29-48:6: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    41:5-50:6: Goto: goto -&gt; bb78">    } else </span><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]"><span class="annotation">@62:</span> if </span><span class="code even" style="--layer: 15" title="bb59: ../instrument-coverage/coverage_of_if_else.rs:43:15: 43:28:
+    43:15-43:28: StorageLive: StorageLive(_47)
+    43:15-43:24: StorageLive: StorageLive(_48)
+    43:15-43:24: Assign: _48 = _41
+    43:15-43:28: Assign: _47 = Gt(move _48, const 2_i32)
+    43:27-43:28: StorageDead: StorageDead(_48)
+    43:15-43:28: FakeRead: FakeRead(ForMatchedPlace, _47)
+    43:12-50:6: SwitchInt: switchInt(_47) -&gt; [false: bb63, otherwise: bb62]"><span class="annotation">@59:</span> countdown &gt; 2</span><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]"><span class="annotation">@62:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]">        </span><span class="code odd" style="--layer: 15" title="bb75: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    45:13-45:26: Assign: _41 = const 0_i32
+    44:61-46:10: Assign: _49 = const ()
+    44:9-46:10: Goto: goto -&gt; bb76"><span class="annotation">@75</span></span><span class="code even" style="--layer: 16" title="bb74: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    44:9-46:10: Assign: _49 = const ()
+    44:9-46:10: Goto: goto -&gt; bb76"><span class="annotation">@74</span></span><span class="code even" style="--layer: 17" title="bb73: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    44:9-46:10: FalseEdge: falseEdge -&gt; [real: bb75, imaginary: bb74]"><span class="annotation">@73:</span> if </span><span class="code even" style="--layer: 18" title="bb67: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:46-44:60: StorageLive: StorageLive(_56)
+    44:46-44:55: StorageLive: StorageLive(_57)
+    44:46-44:55: Assign: _57 = _41
+    44:46-44:60: Assign: _56 = Ne(move _57, const 9_i32)
+    44:59-44:60: StorageDead: StorageDead(_57)
+    44:12-44:60: SwitchInt: switchInt(move _56) -&gt; [false: bb66, otherwise: bb65]"><span class="annotation">@67</span></span><span class="code even" style="--layer: 19" title="bb68: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:59-44:60: StorageDead: StorageDead(_56)
+    44:59-44:60: StorageDead: StorageDead(_51)
+    44:12-44:60: FakeRead: FakeRead(ForMatchedPlace, _50)
+    44:9-46:10: SwitchInt: switchInt(_50) -&gt; [false: bb74, otherwise: bb73]"><span class="annotation">@68</span></span><span class="code even" style="--layer: 20" title="bb65: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:12-44:60: Assign: _50 = const true
+    44:12-44:60: Goto: goto -&gt; bb68"><span class="annotation">@65</span></span><span class="code even" style="--layer: 21" title="bb72: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:41-44:42: StorageDead: StorageDead(_54)
+    44:41-44:42: StorageDead: StorageDead(_52)
+    44:12-44:60: SwitchInt: switchInt(move _51) -&gt; [false: bb67, otherwise: bb65]"><span class="annotation">@72</span></span><span class="code even" style="--layer: 22" title="bb64: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:9-46:10: StorageLive: StorageLive(_49)
+    44:12-44:60: StorageLive: StorageLive(_50)
+    44:12-44:42: StorageLive: StorageLive(_51)
+    44:12-44:25: StorageLive: StorageLive(_52)
+    44:12-44:21: StorageLive: StorageLive(_53)
+    44:12-44:21: Assign: _53 = _41
+    44:12-44:25: Assign: _52 = Lt(move _53, const 1_i32)
+    44:24-44:25: StorageDead: StorageDead(_53)
+    44:12-44:42: SwitchInt: switchInt(move _52) -&gt; [false: bb71, otherwise: bb69]"><span class="annotation">@64</span></span><span class="code even" style="--layer: 23" title="bb66: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:12-44:60: Assign: _50 = const false
+    44:12-44:60: Goto: goto -&gt; bb68"><span class="annotation">@66</span></span><span class="code even" style="--layer: 24" title="bb69: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:42:
+    44:12-44:42: Assign: _51 = const true
+    44:12-44:42: Goto: goto -&gt; bb72"><span class="annotation">@69</span></span><span class="code even" style="--layer: 25" title="bb71: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:42:
+    44:29-44:42: StorageLive: StorageLive(_54)
+    44:29-44:38: StorageLive: StorageLive(_55)
+    44:29-44:38: Assign: _55 = _41
+    44:29-44:42: Assign: _54 = Gt(move _55, const 5_i32)
+    44:41-44:42: StorageDead: StorageDead(_55)
+    44:12-44:42: SwitchInt: switchInt(move _54) -&gt; [false: bb70, otherwise: bb69]"><span class="annotation">@71</span></span><span class="code even" style="--layer: 26" title="bb70: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:42:
+    44:12-44:42: Assign: _51 = const false
+    44:12-44:42: Goto: goto -&gt; bb72"><span class="annotation">@70:</span> countdown &lt; 1 || countdown &gt; 5</span><span class="code even" style="--layer: 23" title="bb66: ../instrument-coverage/coverage_of_if_else.rs:44:12: 44:60:
+    44:12-44:60: Assign: _50 = const false
+    44:12-44:60: Goto: goto -&gt; bb68"><span class="annotation">@66:</span>  || countdown != 9</span><span class="code even" style="--layer: 17" title="bb73: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    44:9-46:10: FalseEdge: falseEdge -&gt; [real: bb75, imaginary: bb74]"><span class="annotation">@73:</span>  {</span></span>
+<span class="line"><span class="code even" style="--layer: 17" title="bb73: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    44:9-46:10: FalseEdge: falseEdge -&gt; [real: bb75, imaginary: bb74]">            countdown = 0;</span></span>
+<span class="line"><span class="code even" style="--layer: 17" title="bb73: ../instrument-coverage/coverage_of_if_else.rs:44:9: 46:10:
+    44:9-46:10: FalseEdge: falseEdge -&gt; [real: bb75, imaginary: bb74]">        </span><span class="code odd" style="--layer: 18" title="bb76: ../instrument-coverage/coverage_of_if_else.rs:46:9: 47:23:
+    46:9-46:10: StorageDead: StorageDead(_50)
+    46:9-46:10: StorageDead: StorageDead(_49)
+    47:9-47:23: Assign: _58 = CheckedSub(_41, const 5_i32)
+    47:9-47:23: Assert: assert(!move (_58.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _41, const 5_i32) -&gt; [success: bb77, unwind: bb1]"><span class="annotation">@76:</span> }</span></span>
+<span class="line"><span class="code odd" style="--layer: 18" title="bb76: ../instrument-coverage/coverage_of_if_else.rs:46:9: 47:23:
+    46:9-46:10: StorageDead: StorageDead(_50)
+    46:9-46:10: StorageDead: StorageDead(_49)
+    47:9-47:23: Assign: _58 = CheckedSub(_41, const 5_i32)
+    47:9-47:23: Assert: assert(!move (_58.1: bool), &quot;attempt to compute `{} - {}` which would overflow&quot;, _41, const 5_i32) -&gt; [success: bb77, unwind: bb1]">        countdown -= 5</span><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]"><span class="annotation">@62:</span> ;</span></span>
+<span class="line"><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]">    } else {</span></span>
+<span class="line"><span class="code even" style="--layer: 14" title="bb62: ../instrument-coverage/coverage_of_if_else.rs:43:12: 50:6:
+    43:12-50:6: FalseEdge: falseEdge -&gt; [real: bb64, imaginary: bb63]">        </span><span class="code even" style="--layer: 15" title="bb63: ../instrument-coverage/coverage_of_if_else.rs:49:9: 51:2:
+    49:9-49:15: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    51:1-51:2: StorageDead: StorageDead(_41)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    51:1-51:2: StorageDead: StorageDead(_1)
+    51:1-51:2: StorageDead: StorageDead(_44)
+    49:9-49:15: Goto: goto -&gt; bb26"><span class="annotation">@63:</span> return;</span></span>
+<span class="line"><span class="code even" style="--layer: 15" title="bb63: ../instrument-coverage/coverage_of_if_else.rs:49:9: 51:2:
+    49:9-49:15: Assign: _0 = const ()
+    50:5-50:6: StorageDead: StorageDead(_47)
+    51:1-51:2: StorageDead: StorageDead(_41)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    51:1-51:2: StorageDead: StorageDead(_1)
+    51:1-51:2: StorageDead: StorageDead(_44)
+    49:9-49:15: Goto: goto -&gt; bb26">    }</span><span class="code even" style="--layer: 16" title="bb78: ../instrument-coverage/coverage_of_if_else.rs:51:1: 51:2:
+    51:1-51:2: StorageDead: StorageDead(_41)
+    51:1-51:2: StorageDead: StorageDead(_21)
+    51:1-51:2: StorageDead: StorageDead(_1)
+    51:1-51:2: StorageDead: StorageDead(_44)
+    51:2-51:2: Goto: goto -&gt; bb26"><span class="annotation">@78:</span> }</span><span><span class="code even" style="--layer: 1" title="bb26: ../instrument-coverage/coverage_of_if_else.rs:51:2: 51:2:
+    51:2-51:2: Return: return"><span class="annotation">@26</span></span></span></span></div>
+</body>
+</html>
diff --git a/src/test/run-make-fulldeps/instrument-coverage/Makefile b/src/test/run-make-fulldeps/instrument-coverage/Makefile
deleted file mode 100644
index 4392cfec080..00000000000
--- a/src/test/run-make-fulldeps/instrument-coverage/Makefile
+++ /dev/null
@@ -1,103 +0,0 @@
-# needs-profiler-support
-# ignore-msvc
-
-# FIXME(richkadel): Debug the following problem, and reenable on Windows (by
-# removing the `# ignore-msvc` directive above). The current implementation
-# generates a segfault when running the instrumented `testprog` executable,
-# after the `main()` function completes, but before the process terminates.
-# This most likely points to a problem generating the LLVM "testprog.profraw"
-# file.
-
--include ../tools.mk
-
-UNAME = $(shell uname)
-
-ifeq ($(UNAME),Darwin)
-	INSTR_PROF_DATA_SUFFIX=,regular,live_support
-	DATA_SECTION_PREFIX=__DATA,
-	LLVM_COV_SECTION_PREFIX=__LLVM_COV,
-else
-	INSTR_PROF_DATA_SUFFIX=
-	DATA_SECTION_PREFIX=
-	LLVM_COV_SECTION_PREFIX=
-endif
-
-# This test makes sure that LLVM coverage maps are genereated in LLVM IR.
-
-COMMON_FLAGS=-Zinstrument-coverage
-
-all:
-	# Compile the test program with instrumentation, and also generate LLVM IR
-	$(RUSTC) $(COMMON_FLAGS) testprog.rs \
-			--emit=link,llvm-ir
-
-	# check the LLVM IR
-ifdef IS_WIN32
-	cat "$(TMPDIR)"/testprog.ll | "$(LLVM_FILECHECK)" filecheck-patterns.txt \
-			-check-prefixes=CHECK,WIN32 \
-			-DPRIVATE_GLOBAL="internal global" \
-			-DINSTR_PROF_DATA=".lprfd$$M" \
-			-DINSTR_PROF_NAME=".lprfn$$M" \
-			-DINSTR_PROF_CNTS=".lprfc$$M" \
-			-DINSTR_PROF_VALS=".lprfv$$M" \
-			-DINSTR_PROF_VNODES=".lprfnd$$M" \
-			-DINSTR_PROF_COVMAP=".lcovmap$$M" \
-			-DINSTR_PROF_ORDERFILE=".lorderfile$$M"
-else
-	cat "$(TMPDIR)"/testprog.ll | "$(LLVM_FILECHECK)" filecheck-patterns.txt \
-			-check-prefixes=CHECK \
-			-DPRIVATE_GLOBAL="private global" \
-			-DINSTR_PROF_DATA="$(DATA_SECTION_PREFIX)__llvm_prf_data$(INSTR_PROF_DATA_SUFFIX)" \
-			-DINSTR_PROF_NAME="$(DATA_SECTION_PREFIX)__llvm_prf_names" \
-			-DINSTR_PROF_CNTS="$(DATA_SECTION_PREFIX)__llvm_prf_cnts" \
-			-DINSTR_PROF_VALS="$(DATA_SECTION_PREFIX)__llvm_prf_vals" \
-			-DINSTR_PROF_VNODES="$(DATA_SECTION_PREFIX)__llvm_prf_vnds" \
-			-DINSTR_PROF_COVMAP="$(LLVM_COV_SECTION_PREFIX)__llvm_covmap" \
-			-DINSTR_PROF_ORDERFILE="$(DATA_SECTION_PREFIX)__llvm_orderfile"
-endif
-
-	# Run it in order to generate some profiling data,
-	# with `LLVM_PROFILE_FILE=<profdata_file>` environment variable set to
-	# output the coverage stats for this run.
-	LLVM_PROFILE_FILE="$(TMPDIR)"/testprog.profraw \
-			$(call RUN,testprog)
-
-	# Postprocess the profiling data so it can be used by the llvm-cov tool
-	"$(LLVM_BIN_DIR)"/llvm-profdata merge --sparse \
-			"$(TMPDIR)"/testprog.profraw \
-			-o "$(TMPDIR)"/testprog.profdata
-
-	# Generate a coverage report using `llvm-cov show`. The output ordering
-	# can be non-deterministic, so ignore the return status. If the test fails
-	# when comparing the JSON `export`, the `show` output may be useful when
-	# debugging.
-	"$(LLVM_BIN_DIR)"/llvm-cov show \
-			--Xdemangler="$(RUST_DEMANGLER)" \
-			--show-line-counts-or-regions \
-			--instr-profile="$(TMPDIR)"/testprog.profdata \
-			$(call BIN,"$(TMPDIR)"/testprog) \
-		> "$(TMPDIR)"/actual_show_coverage.txt
-
-ifdef RUSTC_BLESS_TEST
-	cp "$(TMPDIR)"/actual_show_coverage.txt typical_show_coverage.txt
-else
-	# Compare the show coverage output
-	$(DIFF) typical_show_coverage.txt "$(TMPDIR)"/actual_show_coverage.txt || \
-		>&2 echo 'diff failed for `llvm-cov show` (might not be an error)'
-endif
-
-	# Generate a coverage report in JSON, using `llvm-cov export`, and fail if
-	# there are differences from the expected output.
-	"$(LLVM_BIN_DIR)"/llvm-cov export \
-			--summary-only \
-			--instr-profile="$(TMPDIR)"/testprog.profdata \
-			$(call BIN,"$(TMPDIR)"/testprog) \
-		| "$(PYTHON)" prettify_json.py \
-		> "$(TMPDIR)"/actual_export_coverage.json
-
-ifdef RUSTC_BLESS_TEST
-	cp "$(TMPDIR)"/actual_export_coverage.json expected_export_coverage.json
-else
-	# Check that the exported JSON coverage data matches what we expect
-	$(DIFF) expected_export_coverage.json "$(TMPDIR)"/actual_export_coverage.json
-endif
diff --git a/src/test/run-make-fulldeps/instrument-coverage/compiletest-ignore-dir b/src/test/run-make-fulldeps/instrument-coverage/compiletest-ignore-dir
new file mode 100644
index 00000000000..d57f66a4489
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage/compiletest-ignore-dir
@@ -0,0 +1,3 @@
+# Directory "instrument-coverage" supports the tests at prefix ../instrument-coverage-*
+
+# Use ./x.py [options] test src/test/run-make-fulldeps/instrument-coverage to run all related tests.
\ No newline at end of file
diff --git a/src/test/run-make-fulldeps/instrument-coverage/coverage_of_if_else.rs b/src/test/run-make-fulldeps/instrument-coverage/coverage_of_if_else.rs
new file mode 100644
index 00000000000..91741cf8f0d
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage/coverage_of_if_else.rs
@@ -0,0 +1,51 @@
+#![allow(unused_assignments)]
+
+fn main() {
+    let mut countdown = 0;
+    if true {
+        countdown = 10;
+    }
+
+    if countdown > 7 {
+        countdown -= 4;
+    } else if countdown > 2 {
+        if countdown < 1 || countdown > 5 || countdown != 9 {
+            countdown = 0;
+        }
+        countdown -= 5;
+    } else {
+        return;
+    }
+
+    let mut countdown = 0;
+    if true {
+        countdown = 10;
+    }
+
+    if countdown > 7 {
+        countdown -= 4;
+    } else if countdown > 2 {
+        if countdown < 1 || countdown > 5 || countdown != 9 {
+            countdown = 0;
+        }
+        countdown -= 5;
+    } else {
+        return;
+    }
+
+    let mut countdown = 0;
+    if true {
+        countdown = 10;
+    }
+
+    if countdown > 7 {
+        countdown -= 4;
+    } else if countdown > 2 {
+        if countdown < 1 || countdown > 5 || countdown != 9 {
+            countdown = 0;
+        }
+        countdown -= 5;
+    } else {
+        return;
+    }
+}
diff --git a/src/test/run-make-fulldeps/instrument-coverage/coverage_tools.mk b/src/test/run-make-fulldeps/instrument-coverage/coverage_tools.mk
new file mode 100644
index 00000000000..ad5f465c54f
--- /dev/null
+++ b/src/test/run-make-fulldeps/instrument-coverage/coverage_tools.mk
@@ -0,0 +1,39 @@
+# Common Makefile include for Rust `run-make-fulldeps/instrument-coverage-* tests. Include this
+# file with the line:
+#
+# -include ../instrument-coverage/coverage_tools.mk
+#
+# To enable the Rust compiler option `-C link-dead-code`, also set the following variable
+# *BEFORE* the `-include` line:
+#
+# LINK_DEAD_CODE=yes
+
+-include ../tools.mk
+
+ifndef LINK_DEAD_CODE
+	LINK_DEAD_CODE=no
+endif
+
+# ISSUE(76038): When targeting MSVC, Rust binaries built with both `-Z instrument-coverage` and
+# `-C link-dead-code` typically crash (with a seg-fault) or at best generate an empty `*.profraw`
+# file, required for coverage reports.
+#
+# Enabling `-C link-dead-code` is preferred when compiling with `-Z instrument-coverage`, so
+# `-C link-dead-code` is automatically enabled for all platform targets _except_ MSVC.
+#
+# Making the state of `-C link-dead-code` platform-dependent creates a problem for cross-platform
+# tests because the injected counters, coverage reports, and some low-level output can be different,
+# depending on the `-C link-dead-code` setting. For example, coverage reports will not report any
+# coverage for a dead code region when the `-C link-dead-code` option is disabled, but with the
+# option enabled, those same regions will show coverage counter values (of zero, of course).
+#
+# To ensure cross-platform `-Z instrument-coverage` generate consistent output, the
+# `-C link-dead-code` option is always explicitly enabled or disabled.
+#
+# Since tests that execute binaries enabled with both `-Z instrument-coverage` and
+# `-C link-dead-code` are known to fail, those tests will need the `# ignore-msvc` setting.
+#
+# If and when the above issue is resolved, the `# ignore-msvc` option can be removed, and the
+# tests can be simplified to always test with `-C link-dead-code`.
+
+UNAME = $(shell uname)
diff --git a/src/test/run-make-fulldeps/instrument-coverage/expected_export_coverage.json b/src/test/run-make-fulldeps/instrument-coverage/expected_export_coverage.json
deleted file mode 100644
index 75bec80bdf8..00000000000
--- a/src/test/run-make-fulldeps/instrument-coverage/expected_export_coverage.json
+++ /dev/null
@@ -1,59 +0,0 @@
-{
-  "data": [
-    {
-      "files": [
-        {
-          "filename": "testprog.rs",
-          "summary": {
-            "functions": {
-              "count": 7,
-              "covered": 5,
-              "percent": 71.42857142857143
-            },
-            "instantiations": {
-              "count": 8,
-              "covered": 6,
-              "percent": 75
-            },
-            "lines": {
-              "count": 30,
-              "covered": 25,
-              "percent": 83.33333333333334
-            },
-            "regions": {
-              "count": 7,
-              "covered": 5,
-              "notcovered": 2,
-              "percent": 71.42857142857143
-            }
-          }
-        }
-      ],
-      "totals": {
-        "functions": {
-          "count": 7,
-          "covered": 5,
-          "percent": 71.42857142857143
-        },
-        "instantiations": {
-          "count": 8,
-          "covered": 6,
-          "percent": 75
-        },
-        "lines": {
-          "count": 30,
-          "covered": 25,
-          "percent": 83.33333333333334
-        },
-        "regions": {
-          "count": 7,
-          "covered": 5,
-          "notcovered": 2,
-          "percent": 71.42857142857143
-        }
-      }
-    }
-  ],
-  "type": "llvm.coverage.json.export",
-  "version": "2.0.1"
-}
diff --git a/src/test/run-make-fulldeps/instrument-coverage/filecheck-patterns.txt b/src/test/run-make-fulldeps/instrument-coverage/filecheck-patterns.txt
deleted file mode 100644
index 5a7cc9a1882..00000000000
--- a/src/test/run-make-fulldeps/instrument-coverage/filecheck-patterns.txt
+++ /dev/null
@@ -1,51 +0,0 @@
-# Check for metadata, variables, declarations, and function definitions injected
-# into LLVM IR when compiling with -Zinstrument-coverage.
-
-WIN32:      $__llvm_profile_runtime_user = comdat any
-
-CHECK:      @__llvm_coverage_mapping = internal constant
-CHECK-SAME: section "[[INSTR_PROF_COVMAP]]", align 8
-
-WIN32:      @__llvm_profile_runtime = external global i32
-
-CHECK:      @__profc__R{{[a-zA-Z0-9_]+}}testprog14will_be_called = [[PRIVATE_GLOBAL]]
-CHECK-SAME: section "[[INSTR_PROF_CNTS]]", align 8
-
-CHECK:      @__profd__R{{[a-zA-Z0-9_]+}}testprog14will_be_called = [[PRIVATE_GLOBAL]]
-CHECK-SAME: @__profc__R{{[a-zA-Z0-9_]+}}testprog14will_be_called,
-CHECK-SAME: ()* @_R{{[a-zA-Z0-9_]+}}testprog14will_be_called to i8*),
-CHECK-SAME: section "[[INSTR_PROF_DATA]]", align 8
-
-CHECK:      @__profc__R{{[a-zA-Z0-9_]+}}testprog4main = [[PRIVATE_GLOBAL]]
-CHECK-SAME: section "[[INSTR_PROF_CNTS]]", align 8
-
-CHECK:      @__profd__R{{[a-zA-Z0-9_]+}}testprog4main = [[PRIVATE_GLOBAL]]
-CHECK-SAME: @__profc__R{{[a-zA-Z0-9_]+}}testprog4main,
-CHECK-SAME: ()* @_R{{[a-zA-Z0-9_]+}}testprog4main to i8*),
-CHECK-SAME: section "[[INSTR_PROF_DATA]]", align 8
-
-CHECK:      @__llvm_prf_nm = private constant
-CHECK-SAME: section "[[INSTR_PROF_NAME]]", align 1
-
-CHECK:      @llvm.used = appending global
-CHECK-SAME: i8* bitcast ({ {{.*}} }* @__llvm_coverage_mapping to i8*)
-WIN32-SAME: i8* bitcast (i32 ()* @__llvm_profile_runtime_user to i8*)
-CHECK-SAME: i8* bitcast ({ {{.*}} }* @__profd__R{{[a-zA-Z0-9_]*}}testprog4main to i8*)
-CHECK-SAME: i8* getelementptr inbounds ({{.*}}* @__llvm_prf_nm, i32 0, i32 0)
-CHECK-SAME: section "llvm.metadata"
-
-CHECK:      define hidden { {{.*}} } @_R{{[a-zA-Z0-9_]+}}testprog14will_be_called() unnamed_addr #{{[0-9]+}} {
-CHECK-NEXT: start:
-CHECK-NOT:  bb{{[0-9]+}}:
-CHECK:      %pgocount = load i64, i64* getelementptr inbounds
-CHECK-SAME: * @__profc__R{{[a-zA-Z0-9_]+}}testprog14will_be_called,
-
-CHECK:      declare void @llvm.instrprof.increment(i8*, i64, i32, i32) #[[LLVM_INSTRPROF_INCREMENT_ATTR:[0-9]+]]
-
-WIN32:      define linkonce_odr hidden i32 @__llvm_profile_runtime_user() #[[LLVM_PROFILE_RUNTIME_USER_ATTR:[0-9]+]] comdat {
-WIN32-NEXT: %1 = load i32, i32* @__llvm_profile_runtime
-WIN32-NEXT: ret i32 %1
-WIN32-NEXT: }
-
-CHECK:      attributes #[[LLVM_INSTRPROF_INCREMENT_ATTR]] = { nounwind }
-WIN32:      attributes #[[LLVM_PROFILE_RUNTIME_USER_ATTR]] = { noinline }
\ No newline at end of file
diff --git a/src/test/run-make-fulldeps/instrument-coverage/typical_show_coverage.txt b/src/test/run-make-fulldeps/instrument-coverage/typical_show_coverage.txt
deleted file mode 100644
index ae123afff04..00000000000
--- a/src/test/run-make-fulldeps/instrument-coverage/typical_show_coverage.txt
+++ /dev/null
@@ -1,55 +0,0 @@
-    1|      2|pub fn will_be_called() -> &'static str {
-    2|      2|    let val = "called";
-    3|      2|    println!("{}", val);
-    4|      2|    val
-    5|      2|}
-    6|       |
-    7|      0|pub fn will_not_be_called() -> bool {
-    8|      0|    println!("should not have been called");
-    9|      0|    false
-   10|      0|}
-   11|       |
-   12|       |pub fn print<T>(left: &str, value: T, right: &str)
-   13|       |where
-   14|       |    T: std::fmt::Display,
-   15|      1|{
-   16|      1|    println!("{}{}{}", left, value, right);
-   17|      1|}
-   18|       |
-   19|       |pub fn wrap_with<F, T>(inner: T, should_wrap: bool, wrapper: F)
-   20|       |where
-   21|       |    F: FnOnce(&T)
-   22|      2|{
-   23|      2|    if should_wrap {
-   24|      2|        wrapper(&inner)
-   25|      2|    }
-   26|      2|}
-  ------------------
-  | testprog[317d481089b8c8fe]::wrap_with::<testprog[317d481089b8c8fe]::main::{closure#0}, &str>:
-  |   22|      1|{
-  |   23|      1|    if should_wrap {
-  |   24|      1|        wrapper(&inner)
-  |   25|      1|    }
-  |   26|      1|}
-  ------------------
-  | testprog[317d481089b8c8fe]::wrap_with::<testprog[317d481089b8c8fe]::main::{closure#1}, &str>:
-  |   22|      1|{
-  |   23|      1|    if should_wrap {
-  |   24|      1|        wrapper(&inner)
-  |   25|      1|    }
-  |   26|      1|}
-  ------------------
-   27|       |
-   28|      1|fn main() {
-   29|      1|    let less = 1;
-   30|      1|    let more = 100;
-   31|      1|
-   32|      1|    if less < more {
-   33|      1|        wrap_with(will_be_called(), less < more, |inner| print(" ***", inner, "*** "));
-   34|      1|        wrap_with(will_be_called(), more < less, |inner| print(" ***", inner, "*** "));
-                                                                       ^0
-   35|      1|    } else {
-   36|      1|        wrap_with(will_not_be_called(), true, |inner| print("wrapped result is: ", inner, ""));
-   37|      1|    }
-   38|      1|}
-