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a9fbb2813b
This patch reverses the edge from DIGlobalVariable to GlobalVariable. This will allow us to more easily preserve debug info metadata when manipulating global variables. Fixes PR30362. A program for upgrading test cases is attached to that bug. Differential Revision: http://reviews.llvm.org/D20147 llvm-svn: 281284
86 lines
3.7 KiB
LLVM
86 lines
3.7 KiB
LLVM
; REQUIRES: object-emission
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; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s
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; Testing that two distinct (distinct by writing them in separate files, while
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; still fulfilling C++'s ODR by having identical token sequences) functions,
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; linked under LTO, get plausible debug info (and don't crash).
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; Built from source:
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; $ clang++ a.cpp b.cpp -g -c -emit-llvm
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; $ llvm-link a.bc b.bc -o ab.bc
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; This change is intended to tickle a case where the subprogram MDNode
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; associated with the llvm::Function will differ from the subprogram
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; referenced by the DbgLocs in the function.
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; $ sed -ie "s/!12, !0/!0, !12/" ab.ll
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; $ cat a.cpp
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; inline int func(int i) {
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; return i * 2;
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; }
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; int (*x)(int) = &func;
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; $ cat b.cpp
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; inline int func(int i) {
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; return i * 2;
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; }
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; int (*y)(int) = &func;
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; The DISubprogram should show up in compile unit a.
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; CHECK: DW_TAG_compile_unit
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}}"b.cpp"
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; CHECK-NOT: DW_TAG_subprogram
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; CHECK: DW_TAG_compile_unit
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name {{.*}}"a.cpp"
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; CHECK: DW_AT_name {{.*}} "func"
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@x = global i32 (i32)* @_Z4funci, align 8, !dbg !10
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@y = global i32 (i32)* @_Z4funci, align 8, !dbg !18
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; Function Attrs: inlinehint nounwind uwtable
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define linkonce_odr i32 @_Z4funci(i32 %i) #0 !dbg !4 {
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%1 = alloca i32, align 4
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store i32 %i, i32* %1, align 4
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call void @llvm.dbg.declare(metadata i32* %1, metadata !22, metadata !DIExpression()), !dbg !23
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%2 = load i32, i32* %1, align 4, !dbg !24
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%3 = mul nsw i32 %2, 2, !dbg !24
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ret i32 %3, !dbg !24
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}
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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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attributes #0 = { inlinehint nounwind uwtable }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!12, !0}
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!llvm.module.flags = !{!19, !20}
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!llvm.ident = !{!21, !21}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !9, imports: !2)
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!1 = !DIFile(filename: "a.cpp", directory: "/tmp/dbginfo")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "func", linkageName: "_Z4funci", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2)
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!5 = !DIFile(filename: "a.cpp", directory: "/tmp/dbginfo")
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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 = !{!10}
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!10 = !DIGlobalVariable(name: "x", line: 4, isLocal: false, isDefinition: true, scope: null, file: !5, type: !11)
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !6)
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!12 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !13, enums: !2, retainedTypes: !2, globals: !17, imports: !2)
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!13 = !DIFile(filename: "b.cpp", directory: "/tmp/dbginfo")
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!15 = distinct !DISubprogram(name: "func", linkageName: "_Z4funci", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !12, scopeLine: 1, file: !13, scope: !16, type: !6, variables: !2)
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!16 = !DIFile(filename: "b.cpp", directory: "/tmp/dbginfo")
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!17 = !{!18}
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!18 = !DIGlobalVariable(name: "y", line: 4, isLocal: false, isDefinition: true, scope: null, file: !16, type: !11)
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!19 = !{i32 2, !"Dwarf Version", i32 4}
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!20 = !{i32 1, !"Debug Info Version", i32 3}
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!21 = !{!"clang version 3.5.0 "}
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!22 = !DILocalVariable(name: "i", line: 1, arg: 1, scope: !4, file: !5, type: !8)
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!23 = !DILocation(line: 1, scope: !4)
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!24 = !DILocation(line: 2, scope: !4)
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