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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
66 lines
2.2 KiB
YAML
66 lines
2.2 KiB
YAML
# RUN: llc -march=x86-64 -start-after machine-sink -stop-after machine-sink -o /dev/null %s | FileCheck %s
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# This test ensures that the MIR parser parses the stack object's debug info
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# correctly.
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--- |
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
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define void @foo() #1 {
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entry:
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%x.i = alloca i8, align 1
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%y.i = alloca [256 x i8], align 16
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%0 = bitcast [256 x i8]* %y.i to i8*
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br label %for.body
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for.body:
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%1 = bitcast [256 x i8]* %y.i to i8*
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call void @llvm.lifetime.end(i64 -1, i8* %1) #3
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call void @llvm.lifetime.start(i64 -1, i8* %0) #3
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call void @llvm.dbg.declare(metadata i8* %0, metadata !4, metadata !7) #3, !dbg !8
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br label %for.body
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}
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declare void @llvm.lifetime.start(i64, i8* nocapture) #2
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declare void @llvm.lifetime.end(i64, i8* nocapture) #2
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attributes #0 = { nounwind readnone }
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attributes #1 = { nounwind ssp uwtable }
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attributes #2 = { nounwind argmemonly }
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attributes #3 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3}
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!0 = distinct !DICompileUnit(language: DW_LANG_C89, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: 0, enums: !2, retainedTypes: !2)
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!1 = !DIFile(filename: "t.c", directory: "")
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!2 = !{}
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!3 = !{i32 1, !"Debug Info Version", i32 3}
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!4 = !DILocalVariable(name: "x", scope: !5, file: !1, line: 16, type: !6)
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!5 = distinct !DISubprogram(scope: null, isLocal: false, isDefinition: true, isOptimized: false)
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!6 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!7 = !DIExpression()
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!8 = !DILocation(line: 0, scope: !5)
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...
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---
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name: foo
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isSSA: true
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tracksRegLiveness: true
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frameInfo:
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maxAlignment: 16
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# CHECK-LABEL: foo
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# CHECK: stack:
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# CHECK: - { id: 0, name: y.i, offset: 0, size: 256, alignment: 16, di-variable: '!4',
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# CHECK-NEXT: di-expression: '!7', di-location: '!8' }
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stack:
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- { id: 0, name: y.i, offset: 0, size: 256, alignment: 16, di-variable: '!4',
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di-expression: '!7', di-location: '!8' }
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body: |
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bb.0.entry:
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successors: %bb.1.for.body
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bb.1.for.body:
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successors: %bb.1.for.body
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DBG_VALUE %stack.0.y.i, 0, !4, !7, debug-location !8
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JMP_1 %bb.1.for.body
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...
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