814b8e91c7
As a follow-up to r246098, require `DISubprogram` definitions
(`isDefinition: true`) to be 'distinct'. Specifically, add an assembler
check, a verifier check, and bitcode upgrading logic to combat testcase
bitrot after the `DIBuilder` change.
While working on the testcases, I realized that
test/Linker/subprogram-linkonce-weak-odr.ll isn't relevant anymore. Its
purpose was to check for a corner case in PR22792 where two subprogram
definitions match exactly and share the same metadata node. The new
verifier check, requiring that subprogram definitions are 'distinct',
precludes that possibility.
I updated almost all the IR with the following script:
git grep -l -E -e '= !DISubprogram\(.* isDefinition: true' |
grep -v test/Bitcode |
xargs sed -i '' -e 's/= \(!DISubprogram(.*, isDefinition: true\)/= distinct \1/'
Likely some variant of would work for out-of-tree testcases.
llvm-svn: 246327
58 lines
2.2 KiB
LLVM
58 lines
2.2 KiB
LLVM
; REQUIRES: object-emission
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; RUN: llc -mtriple=x86_64-linux-gnu -filetype=obj %s -o - | llvm-dwarfdump -debug-dump=all - | FileCheck %s
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; Test that we accept and generate DWARF entities for DW_TAG_structure_type,
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; DW_TAG_member and DW_TAG_typedef with no source location. These can come up
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; in some languages with predefined types.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.S = type { %struct.S* }
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define void @f() {
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%x = alloca %struct.S, align 8
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; CHECK: DW_TAG_typedef
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; CHECK-NOT: DW_AT_decl_file
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; CHECK-NOT: DW_AT_decl_line
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; CHECK: DW_TAG_structure_type
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; CHECK-NOT: DW_AT_decl_file
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; CHECK-NOT: DW_AT_decl_line
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; CHECK: DW_TAG_member
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; CHECK-NOT: DW_AT_decl_file
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; CHECK-NOT: DW_AT_decl_line
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; CHECK: {{DW_TAG|NULL}}
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call void @llvm.dbg.declare(metadata %struct.S* %x, metadata !10, metadata !16), !dbg !17
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ret void, !dbg !18
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}
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!7, !8}
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!llvm.ident = !{!9}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !DIFile(filename: "file.c", directory: "/dir")
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!2 = !{}
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!3 = !{!4}
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!4 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 7, type: !5, isLocal: false, isDefinition: true, scopeLine: 7, isOptimized: false, function: void ()* @f, variables: !2)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null}
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{!"clang"}
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!10 = !DILocalVariable(name: "x", scope: !4, file: !1, line: 8, type: !11)
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!11 = !DIDerivedType(tag: DW_TAG_typedef, name: "SS", baseType: !12)
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!12 = !DICompositeType(tag: DW_TAG_structure_type, name: "S", size: 64, align: 64, elements: !13)
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!13 = !{!14}
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!14 = !DIDerivedType(tag: DW_TAG_member, name: "s", scope: !12, baseType: !15, size: 64, align: 64)
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!15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64, align: 64)
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!16 = !DIExpression()
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!17 = !DILocation(line: 8, column: 6, scope: !4)
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!18 = !DILocation(line: 9, column: 1, scope: !4)
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