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Generate more precise generator names #92873

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merged 2 commits into from
Jan 15, 2022
Merged

Generate more precise generator names #92873

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05e1f0d
Generate more precise generator names
eholk Jan 13, 2022
a1173cf
Fix non-MSVC test
eholk Jan 13, 2022
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10 changes: 8 additions & 2 deletions compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -519,12 +519,18 @@ fn push_unqualified_item_name(
output.push_str(tcx.crate_name(def_id.krate).as_str());
}
DefPathData::ClosureExpr if tcx.generator_kind(def_id).is_some() => {
let key = match tcx.generator_kind(def_id).unwrap() {
hir::GeneratorKind::Async(hir::AsyncGeneratorKind::Block) => "async_block",
hir::GeneratorKind::Async(hir::AsyncGeneratorKind::Closure) => "async_closure",
hir::GeneratorKind::Async(hir::AsyncGeneratorKind::Fn) => "async_fn",
hir::GeneratorKind::Gen => "generator",
};
// Generators look like closures, but we want to treat them differently
// in the debug info.
if cpp_like_debuginfo(tcx) {
write!(output, "generator${}", disambiguated_data.disambiguator).unwrap();
write!(output, "{}${}", key, disambiguated_data.disambiguator).unwrap();
} else {
write!(output, "{{generator#{}}}", disambiguated_data.disambiguator).unwrap();
write!(output, "{{{}#{}}}", key, disambiguated_data.disambiguator).unwrap();
}
}
_ => match disambiguated_data.data.name() {
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2 changes: 1 addition & 1 deletion src/test/codegen/async-fn-debug-msvc.rs
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Expand Up @@ -17,7 +17,7 @@ async fn async_fn_test() {
// FIXME: No way to reliably check the filename.

// CHECK-DAG: [[ASYNC_FN:!.*]] = !DINamespace(name: "async_fn_test"
// CHECK-DAG: [[GEN:!.*]] = !DICompositeType(tag: DW_TAG_union_type, name: "generator$0"
// CHECK-DAG: [[GEN:!.*]] = !DICompositeType(tag: DW_TAG_union_type, name: "async_fn$0"
// CHECK: {{!.*}} = !DIDerivedType(tag: DW_TAG_member, name: "variant0", scope: [[GEN]],
// For brevity, we only check the struct name and members of the last variant.
// CHECK-SAME: file: [[FILE:![0-9]*]], line: 11,
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2 changes: 1 addition & 1 deletion src/test/codegen/async-fn-debug.rs
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Expand Up @@ -17,7 +17,7 @@ async fn async_fn_test() {
// FIXME: No way to reliably check the filename.

// CHECK-DAG: [[ASYNC_FN:!.*]] = !DINamespace(name: "async_fn_test"
// CHECK-DAG: [[GEN:!.*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "{generator#0}", scope: [[ASYNC_FN]]
// CHECK-DAG: [[GEN:!.*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "{async_fn#0}", scope: [[ASYNC_FN]]
// CHECK: [[VARIANT:!.*]] = !DICompositeType(tag: DW_TAG_variant_part, scope: [[ASYNC_FN]],
// CHECK-NOT: flags: DIFlagArtificial
// CHECK-SAME: discriminator: [[DISC:![0-9]*]]
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