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coverage: Don't bother storing the source file in Instrumentor

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We can just as easily look it up again from the source map and body span when
needed.
This commit is contained in:
Zalathar 2023-12-14 11:55:35 +11:00
parent 3d5d5b7ef8
commit bf424c28d2
1 changed files with 3 additions and 4 deletions
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7
compiler/rustc_mir_transform/src/coverage/mod.rs
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@ -24,7 +24,7 @@
use rustc_middle::ty::TyCtxt; use rustc_middle::ty::TyCtxt;
use rustc_span::def_id::{DefId, LocalDefId}; use rustc_span::def_id::{DefId, LocalDefId};
use rustc_span::source_map::SourceMap; use rustc_span::source_map::SourceMap;
use rustc_span::{ExpnKind, SourceFile, Span, Symbol}; use rustc_span::{ExpnKind, Span, Symbol};
/// Inserts `StatementKind::Coverage` statements that either instrument the binary with injected /// Inserts `StatementKind::Coverage` statements that either instrument the binary with injected
/// counters, via intrinsic `llvm.instrprof.increment`, and/or inject metadata used during codegen /// counters, via intrinsic `llvm.instrprof.increment`, and/or inject metadata used during codegen
@ -69,7 +69,6 @@ fn run_pass(&self, tcx: TyCtxt<'tcx>, mir_body: &mut mir::Body<'tcx>) {
struct Instrumentor<'a, 'tcx> { struct Instrumentor<'a, 'tcx> {
tcx: TyCtxt<'tcx>, tcx: TyCtxt<'tcx>,
mir_body: &'a mut mir::Body<'tcx>, mir_body: &'a mut mir::Body<'tcx>,
source_file: Lrc<SourceFile>,
fn_sig_span: Span, fn_sig_span: Span,
body_span: Span, body_span: Span,
function_source_hash: u64, function_source_hash: u64,
@ -109,7 +108,6 @@ fn new(tcx: TyCtxt<'tcx>, mir_body: &'a mut mir::Body<'tcx>) -> Self {
Self { Self {
tcx, tcx,
mir_body, mir_body,
source_file,
fn_sig_span, fn_sig_span,
body_span, body_span,
function_source_hash, function_source_hash,
@ -160,9 +158,10 @@ fn create_mappings_and_inject_coverage_statements(
let source_map = self.tcx.sess.source_map(); let source_map = self.tcx.sess.source_map();
let body_span = self.body_span; let body_span = self.body_span;
let source_file = source_map.lookup_source_file(body_span.lo());
use rustc_session::RemapFileNameExt; use rustc_session::RemapFileNameExt;
let file_name = let file_name =
Symbol::intern(&self.source_file.name.for_codegen(self.tcx.sess).to_string_lossy()); Symbol::intern(&source_file.name.for_codegen(self.tcx.sess).to_string_lossy());
let mut mappings = Vec::new(); let mut mappings = Vec::new();