Merge ref '6bcdcc73bd11' from rust-lang/rust

Pull recent changes from https://github.com/rust-lang/rust via Josh.

Upstream ref: 6bcdcc73bd11568fd85f5a38b58e1eda054ad1cd
Filtered ref: 6cc4ce79e1f8dc0ec5a2e18049b9c1a51dee3221

This merge was created using https://github.com/rust-lang/josh-sync.

1 files changed, 3 insertions, 17 deletions

diff --git a/compiler/rustc_mir_transform/src/coverage/mappings.rs b/compiler/rustc_mir_transform/src/coverage/mappings.rs
index b4b4d0416fb..b0e24cf2bdb 100644
--- a/compiler/rustc_mir_transform/src/coverage/mappings.rs
+++ b/compiler/rustc_mir_transform/src/coverage/mappings.rs
@@ -10,7 +10,7 @@ use rustc_middle::ty::TyCtxt;
 use rustc_span::Span;
 
 use crate::coverage::ExtractedHirInfo;
-use crate::coverage::graph::{BasicCoverageBlock, CoverageGraph, START_BCB};
+use crate::coverage::graph::{BasicCoverageBlock, CoverageGraph};
 use crate::coverage::spans::extract_refined_covspans;
 use crate::coverage::unexpand::unexpand_into_body_span;
 use crate::errors::MCDCExceedsTestVectorLimit;
@@ -82,22 +82,8 @@ pub(super) fn extract_all_mapping_info_from_mir<'tcx>(
     let mut mcdc_degraded_branches = vec![];
     let mut mcdc_mappings = vec![];
 
-    if hir_info.is_async_fn || tcx.sess.coverage_no_mir_spans() {
-        // An async function desugars into a function that returns a future,
-        // with the user code wrapped in a closure. Any spans in the desugared
-        // outer function will be unhelpful, so just keep the signature span
-        // and ignore all of the spans in the MIR body.
-        //
-        // When debugging flag `-Zcoverage-options=no-mir-spans` is set, we need
-        // to give the same treatment to _all_ functions, because `llvm-cov`
-        // seems to ignore functions that don't have any ordinary code spans.
-        if let Some(span) = hir_info.fn_sig_span {
-            code_mappings.push(CodeMapping { span, bcb: START_BCB });
-        }
-    } else {
-        // Extract coverage spans from MIR statements/terminators as normal.
-        extract_refined_covspans(tcx, mir_body, hir_info, graph, &mut code_mappings);
-    }
+    // Extract ordinary code mappings from MIR statement/terminator spans.
+    extract_refined_covspans(tcx, mir_body, hir_info, graph, &mut code_mappings);
 
     branch_pairs.extend(extract_branch_pairs(mir_body, hir_info, graph));