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0c1aee0b16
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
36 lines
1.6 KiB
LLVM
36 lines
1.6 KiB
LLVM
; RUN: llc -mtriple=x86_64-linux < %s | FileCheck %s
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; CHECK: .section .debug_info
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; CHECK: DW_AT_const_value
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; CHECK-NEXT: 42
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define i128 @__foo(i128 %a, i128 %b) nounwind {
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entry:
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tail call void @llvm.dbg.value(metadata i128 42 , i64 0, metadata !1, metadata !DIExpression()), !dbg !11
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%add = add i128 %a, %b, !dbg !11
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ret i128 %add, !dbg !11
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}
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone
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!llvm.dbg.cu = !{!5}
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!llvm.module.flags = !{!16}
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!0 = !{i128 42 }
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!1 = !DILocalVariable(name: "MAX", line: 29, scope: !2, file: !4, type: !8)
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!2 = distinct !DILexicalBlock(line: 26, column: 0, file: !13, scope: !3)
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!3 = distinct !DISubprogram(name: "__foo", linkageName: "__foo", line: 26, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, scopeLine: 26, file: !13, scope: !4, type: !6, function: i128 (i128, i128)* @__foo)
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!4 = !DIFile(filename: "foo.c", directory: "/tmp")
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!5 = distinct !DICompileUnit(language: DW_LANG_C89, producer: "clang", isOptimized: true, emissionKind: 0, file: !13, enums: !15, retainedTypes: !15, subprograms: !12, imports: null)
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!6 = !DISubroutineType(types: !7)
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!7 = !{!8, !8, !8}
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!8 = !DIDerivedType(tag: DW_TAG_typedef, name: "ti_int", line: 78, file: !14, scope: !4, baseType: !10)
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!9 = !DIFile(filename: "myint.h", directory: "/tmp")
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!10 = !DIBasicType(tag: DW_TAG_base_type, size: 128, align: 128, encoding: DW_ATE_signed)
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!11 = !DILocation(line: 29, scope: !2)
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!12 = !{!3}
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!13 = !DIFile(filename: "foo.c", directory: "/tmp")
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!14 = !DIFile(filename: "myint.h", directory: "/tmp")
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!15 = !{}
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!16 = !{i32 1, !"Debug Info Version", i32 3}
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