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a5b2af0eae
Summary: Most DIExpressions are empty or very simple. When they are complex, they tend to be unique, so checking them inline is reasonable. This also avoids the need for CodeGen passes to append to the llvm.dbg.mir named md node. See also PR22780, for making DIExpression not be an MDNode. Reviewers: aprantl, dexonsmith, dblaikie Subscribers: qcolombet, javed.absar, eraman, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D37075 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@311594 91177308-0d34-0410-b5e6-96231b3b80d8
68 lines
2.4 KiB
YAML
68 lines
2.4 KiB
YAML
# RUN: llc -march=x86-64 -run-pass none -o - %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 !DIExpression()) #3, !dbg !7
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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: FullDebug, 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: !8)
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!5 = distinct !DISubprogram(scope: null, isLocal: false, isDefinition: true, isOptimized: false, unit: !0)
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!6 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!7 = !DILocation(line: 0, scope: !5)
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!8 = !DICompositeType(tag: DW_TAG_array_type, baseType: !6, size: 2048, align: 8, elements: !9)
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!9 = !{!10}
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!10 = !DISubrange(count: 256)
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...
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---
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name: foo
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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, type: default, offset: 0, size: 256, alignment: 16,
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# CHECK-NEXT: callee-saved-register: '', di-variable: '!4', di-expression: '!DIExpression()',
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# CHECK-NEXT: di-location: '!10' }
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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: '!DIExpression()', di-location: '!7' }
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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, !DIExpression(), debug-location !7
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JMP_1 %bb.1.for.body
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...
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