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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
30 lines
1.3 KiB
LLVM
30 lines
1.3 KiB
LLVM
; RUN: llc %s -o %t -filetype=obj -mtriple=x86_64-unknown-linux-gnu
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; RUN: llvm-dwarfdump -debug-dump=line %t | FileCheck %s
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; PR13303
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; Check that the prologue ends with is_stmt here.
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; CHECK: 0x0000000000000000 {{.*}} is_stmt
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define i32 @main() nounwind uwtable {
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entry:
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%retval = alloca i32, align 4
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store i32 0, i32* %retval
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ret i32 0, !dbg !10
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!13}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.2 (trunk 160143)", isOptimized: false, emissionKind: 0, file: !12, enums: !1, retainedTypes: !1, subprograms: !3, globals: !1, imports: !1)
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!1 = !{}
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!3 = !{!5}
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!5 = distinct !DISubprogram(name: "main", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, scopeLine: 1, file: !12, scope: !6, type: !7, function: i32 ()* @main, variables: !1)
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!6 = !DIFile(filename: "PR13303.c", directory: "/home/probinson")
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!7 = !DISubroutineType(types: !8)
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!8 = !{!9}
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!9 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!10 = !DILocation(line: 1, column: 14, scope: !11)
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!11 = distinct !DILexicalBlock(line: 1, column: 12, file: !12, scope: !5)
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!12 = !DIFile(filename: "PR13303.c", directory: "/home/probinson")
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!13 = !{i32 1, !"Debug Info Version", i32 3}
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