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In constructAbstractSubprogramScopeDIE there can be a potential mismatch between `this` and the CU of ContextDIE when a scope is shared between two DISubprograms belonging to a different CU. In that case, `this` is the CU that was specified in the IR, but the CU of ContextDIE is that of the first subprogram that was emitted. This patch fixes the mismatch by looking up the CU of ContextDIE, and switching to use that. This fixes PR35212 (https://bugs.llvm.org/show_bug.cgi?id=35212) Patch by Philip Craig! Differential revision: https://reviews.llvm.org/D39981 llvm-svn: 318289
51 lines
3.2 KiB
LLVM
51 lines
3.2 KiB
LLVM
; RUN: %llc_dwarf %s -filetype=obj -o %t
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; RUN: llvm-dwarfdump -debug-info %t | FileCheck %s
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; Reduced test case from PR35212. Two DISubprogram belong to a different CU but
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; share a scope. Both are declarations and end up in the scope's CU. We want to
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; check that the CU from the context DIE is used (rather than from the IR).
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; This manifests itself by the DW_base_type ending up in the second CU, rather
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; than in the first one as specified in the IR.
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; CHECK: DW_TAG_compile_unit
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; CHECK-NEXT: discriminator 0
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; CHECK: DW_TAG_compile_unit
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; CHECK-NEXT: discriminator 1
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; CHECK: DW_TAG_structure_type
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; CHECK-NOT: NULL
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: NULL
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: NULL
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; CHECK: DW_AT_type{{.*}}"usize"
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; CHECK: NULL
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; CHECK: DW_TAG_base_type
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; CHECK-NOT: NULL
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; CHECK: DW_AT_name{{.*}}"usize"
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define hidden void @foo() !dbg !4 {
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ret void, !dbg !7
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}
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!llvm.dbg.cu = !{!0, !2}
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!llvm.module.flags = !{!3}
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!0 = distinct !DICompileUnit(language: DW_LANG_Rust, file: !1, producer: "clang LLVM (rustc version 1.23.0-nightly (discriminator 0))", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "../lib.rs", directory: "/home/alex/code/rust4/lol")
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!2 = distinct !DICompileUnit(language: DW_LANG_Rust, file: !1, producer: "clang LLVM (rustc version 1.23.0-nightly (discriminator 1))", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = distinct !DISubprogram(name: "clone<alloc::string::String>", linkageName: "_ZN5alloc3vec8{{impl}}28clone<alloc::string::String>E", scope: null, file: !1, line: 1519, type: !5, isLocal: false, isDefinition: true, scopeLine: 1519, flags: DIFlagPrototyped, isOptimized: true, unit: !0, templateParams: !6, variables: !6)
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!5 = !DISubroutineType(types: !6)
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!6 = !{}
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!7 = !DILocation(line: 1612, scope: !8, inlinedAt: !11)
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!8 = distinct !DILexicalBlock(scope: !9, file: !1, line: 86, column: 12)
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!9 = distinct !DISubprogram(name: "allocate_in<alloc::string::String,alloc::heap::Heap>", linkageName: "_ZN5alloc7raw_vec8{{impl}}52allocate_in<alloc::string::String,alloc::heap::Heap>E", scope: !10, file: !1, line: 82, type: !5, isLocal: false, isDefinition: true, scopeLine: 82, flags: DIFlagPrototyped, isOptimized: true, unit: !2, templateParams: !6, variables: !6)
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!10 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "RawVec<alloc::string::String, alloc::heap::Heap>", file: !1, size: 128, align: 64, elements: !6, identifier: "5c6e4db16d2c64555e40661d70c4d81e")
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!11 = distinct !DILocation(line: 86, scope: !8, inlinedAt: !12)
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!12 = distinct !DILocation(line: 141, scope: !13, inlinedAt: !17)
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!13 = distinct !DISubprogram(name: "with_capacity<alloc::string::String>", linkageName: "_ZN5alloc7raw_vec8{{impl}}36with_capacity<alloc::string::String>E", scope: !10, file: !1, line: 140, type: !5, isLocal: false, isDefinition: true, scopeLine: 140, flags: DIFlagPrototyped, isOptimized: true, unit: !0, templateParams: !6, variables: !14)
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!14 = !{!15}
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!15 = !DILocalVariable(name: "cap", arg: 1, scope: !13, file: !1, line: 1, type: !16)
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!16 = !DIBasicType(name: "usize", size: 64, encoding: DW_ATE_unsigned)
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!17 = !DILocation(line: 1521, scope: !4)
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