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a2029fa58e
In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
98 lines
4.6 KiB
LLVM
98 lines
4.6 KiB
LLVM
; REQUIRES: object-emission
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; Test (r)value qualifiers on C++11 non-static member functions.
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; Generated from tools/clang/test/CodeGenCXX/debug-info-qualifiers.cpp
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;
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; class A {
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; public:
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; void l() const &;
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; void r() const &&;
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; };
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;
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; void g() {
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; A a;
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; auto pl = &A::l;
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; auto pr = &A::r;
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; }
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;
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; RUN: %llc_dwarf -filetype=obj -O0 < %s | llvm-dwarfdump -v - | FileCheck %s
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; CHECK: DW_TAG_subroutine_type DW_CHILDREN_yes
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; CHECK-NEXT: DW_AT_reference DW_FORM_flag_present
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; CHECK: DW_TAG_subroutine_type DW_CHILDREN_yes
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; CHECK-NEXT: DW_AT_rvalue_reference DW_FORM_flag_present
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;
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG_subprogram
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; CHECK: DW_AT_name {{.*}}"l"
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; CHECK-NOT: DW_TAG_subprogram
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; CHECK: DW_AT_reference [DW_FORM_flag_present] (true)
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; CHECK: DW_TAG_subprogram
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; CHECK-NOT: DW_TAG_subprogram
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; CHECK: DW_AT_name {{.*}}"r"
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; CHECK-NOT: DW_TAG_subprogram
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; CHECK: DW_AT_rvalue_reference [DW_FORM_flag_present] (true)
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%class.A = type { i8 }
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; Function Attrs: nounwind
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define void @_Z1gv() #0 !dbg !17 {
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%a = alloca %class.A, align 1
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%pl = alloca { i64, i64 }, align 8
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%pr = alloca { i64, i64 }, align 8
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call void @llvm.dbg.declare(metadata %class.A* %a, metadata !24, metadata !DIExpression()), !dbg !25
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call void @llvm.dbg.declare(metadata { i64, i64 }* %pl, metadata !26, metadata !DIExpression()), !dbg !31
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store { i64, i64 } { i64 ptrtoint (void (%class.A*)* @_ZNKR1A1lEv to i64), i64 0 }, { i64, i64 }* %pl, align 8, !dbg !31
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call void @llvm.dbg.declare(metadata { i64, i64 }* %pr, metadata !32, metadata !DIExpression()), !dbg !35
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store { i64, i64 } { i64 ptrtoint (void (%class.A*)* @_ZNKO1A1rEv to i64), i64 0 }, { i64, i64 }* %pr, align 8, !dbg !35
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ret void, !dbg !36
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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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declare void @_ZNKR1A1lEv(%class.A*)
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declare void @_ZNKO1A1rEv(%class.A*)
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!21, !22}
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!llvm.ident = !{!23}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !2, imports: !2)
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!1 = !DIFile(filename: "debug-info-qualifiers.cpp", directory: "")
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!2 = !{}
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!3 = !{!4}
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!4 = !DICompositeType(tag: DW_TAG_class_type, name: "A", line: 2, size: 8, align: 8, file: !5, elements: !6, identifier: "_ZTS1A")
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!5 = !DIFile(filename: "debug-info-qualifiers.cpp", directory: "")
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!6 = !{!7, !13}
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!7 = !DISubprogram(name: "l", linkageName: "_ZNKR1A1lEv", line: 5, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped | DIFlagLValueReference, isOptimized: false, scopeLine: 5, file: !5, scope: !4, type: !8)
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!8 = !DISubroutineType(flags: DIFlagLValueReference, types: !9)
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!9 = !{null, !10}
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!10 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !11)
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!11 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !4)
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!13 = !DISubprogram(name: "r", linkageName: "_ZNKO1A1rEv", line: 7, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagObjectPointer | DIFlagRValueReference, isOptimized: false, scopeLine: 7, file: !5, scope: !4, type: !14)
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!14 = !DISubroutineType(flags: DIFlagRValueReference, types: !9)
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!17 = distinct !DISubprogram(name: "g", linkageName: "_Z1gv", line: 10, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 10, file: !5, scope: !18, type: !19, retainedNodes: !2)
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!18 = !DIFile(filename: "debug-info-qualifiers.cpp", directory: "")
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!19 = !DISubroutineType(types: !20)
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!20 = !{null}
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!21 = !{i32 2, !"Dwarf Version", i32 4}
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!22 = !{i32 1, !"Debug Info Version", i32 3}
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!23 = !{!"clang version 3.5 "}
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!24 = !DILocalVariable(name: "a", line: 11, scope: !17, file: !18, type: !4)
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!25 = !DILocation(line: 11, scope: !17)
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!26 = !DILocalVariable(name: "pl", line: 16, scope: !17, file: !18, type: !27)
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!27 = !DIDerivedType(tag: DW_TAG_ptr_to_member_type, baseType: !28, extraData: !4)
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!28 = !DISubroutineType(flags: DIFlagLValueReference, types: !29)
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!29 = !{null, !30}
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!30 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !4)
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!31 = !DILocation(line: 16, scope: !17)
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!32 = !DILocalVariable(name: "pr", line: 21, scope: !17, file: !18, type: !33)
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!33 = !DIDerivedType(tag: DW_TAG_ptr_to_member_type, baseType: !34, extraData: !4)
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!34 = !DISubroutineType(flags: DIFlagRValueReference, types: !29)
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!35 = !DILocation(line: 21, scope: !17)
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!36 = !DILocation(line: 22, scope: !17)
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