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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
61 lines
2.6 KiB
LLVM
61 lines
2.6 KiB
LLVM
; RUN: llc %s -filetype=obj -o - | llvm-dwarfdump --debug-dump=info - | FileCheck %s
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; CHECK: DW_TAG_variable
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; DW_OP_fbreg
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; CHECK-NEXT: DW_AT_location [DW_FORM_exprloc] (<0x2> 91 00 )
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; CHECK-NEXT: DW_AT_name {{.*}}"i"
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target datalayout = "e-m:e-p:32:32-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-darwin"
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; Function Attrs: nounwind uwtable
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declare i32 @foo(i32 %i) #0
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: nounwind uwtable
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define i32 @main() #0 {
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entry:
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%retval = alloca i32, align 4
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%i = alloca i32, align 4
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store i32 0, i32* %retval
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call void @llvm.dbg.declare(metadata i32* %i, metadata !20, metadata !16), !dbg !21
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store i32 20, i32* %i, align 4, !dbg !21
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%0 = load i32, i32* %i, align 4, !dbg !22
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%call = call i32 @foo(i32 %0), !dbg !23
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ret i32 %call, !dbg !24
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}
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attributes #0 = { nounwind uwtable }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!12, !13}
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!llvm.ident = !{!14}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.7.0", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !DIFile(filename: "x.c", directory: "")
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!2 = !{}
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!3 = !{!4, !9}
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!4 = distinct !DISubprogram(name: "foo", line: 2, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !5, type: !6, function: i32 (i32)* @foo, variables: !2)
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!5 = !DIFile(filename: "x.c", directory: "")
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!6 = !DISubroutineType(types: !7)
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!7 = !{!8, !8}
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!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!9 = distinct !DISubprogram(name: "main", line: 8, isLocal: false, isDefinition: true, isOptimized: false, scopeLine: 9, file: !1, scope: !5, type: !10, function: i32 ()* @main, variables: !2)
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!10 = !DISubroutineType(types: !11)
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!11 = !{!8}
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!12 = !{i32 2, !"Dwarf Version", i32 4}
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!13 = !{i32 2, !"Debug Info Version", i32 3}
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!14 = !{!"clang version 3.7.0"}
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!15 = !DILocalVariable(name: "i", line: 2, arg: 1, scope: !4, file: !5, type: !8)
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!16 = !DIExpression()
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!17 = !DILocation(line: 2, column: 10, scope: !4)
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!18 = !DILocation(line: 4, column: 10, scope: !4)
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!19 = !DILocation(line: 4, column: 3, scope: !4)
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!20 = !DILocalVariable(name: "i", line: 10, scope: !9, file: !5, type: !8)
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!21 = !DILocation(line: 10, column: 7, scope: !9)
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!22 = !DILocation(line: 11, column: 15, scope: !9)
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!23 = !DILocation(line: 11, column: 10, scope: !9)
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!24 = !DILocation(line: 11, column: 3, scope: !9)
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