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https://github.com/RPCS3/llvm-mirror.git
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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
5.8 KiB
LLVM
98 lines
5.8 KiB
LLVM
; RUN: llc -filetype=obj -o - %s | llvm-dwarfdump -debug-loc - | FileCheck %s
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; Note that it would be even better to avoid emitting the empty piece.
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; CHECK: {{.*}}: DW_OP_piece 0x8{{$}}
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source_filename = "bugpoint-reduced-simplified.ll"
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target triple = "i386-apple-ios7.0.0"
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%class.K = type { %class.N, %struct.F, i32 }
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%class.N = type { %struct.B }
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%struct.B = type { i8 }
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%struct.F = type { i8 }
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%struct.ConditionPlatformHelper = type { i8 }
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%"struct.J<K::L, false, int>::Node" = type { %"class.K::L" }
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%"class.K::L" = type { %class.__thread_id }
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%class.__thread_id = type { i32 }
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%"struct.K::M" = type { %class.I, %class.H }
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%class.I = type { i32 }
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%class.H = type { i32 }
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; Function Attrs: nounwind
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define void @_Z34swift_getGenericMetadata_argumentsv() #0 !dbg !5 {
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entry:
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%ref.tmp = alloca %class.K, align 8
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%0 = getelementptr inbounds %class.K, %class.K* %ref.tmp, i32 0, i32 0, i32 0, i32 0
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%call = tail call i64 @_Z8getCacheP23ConditionPlatformHelper(%struct.ConditionPlatformHelper* undef)
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%1 = bitcast %class.K* %ref.tmp to i64*
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%LastSearch.i.i = getelementptr inbounds %class.K, %class.K* %ref.tmp, i32 0, i32 0, i32 0
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%call.i.i = call %"struct.J<K::L, false, int>::Node"* @_ZN1BIPN1JIN1K1LELb0EiE4NodeEE4loadEv(%struct.B* nonnull %LastSearch.i.i)
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%tobool.i.i = icmp eq %"struct.J<K::L, false, int>::Node"* %call.i.i, null
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br i1 %tobool.i.i, label %_ZN1NIN1K1LELi0EE11getOrInsertIiEE1AIPS1_ET_.exit.i, label %if.then.i.i
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if.then.i.i:
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%2 = lshr i64 %call, 32
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%3 = trunc i64 %2 to i32
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%Payload.i.i = getelementptr inbounds %"struct.J<K::L, false, int>::Node", %"struct.J<K::L, false, int>::Node"* %call.i.i, i32 0, i32 0
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br label %_ZN1NIN1K1LELi0EE11getOrInsertIiEE1AIPS1_ET_.exit.i
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_ZN1NIN1K1LELi0EE11getOrInsertIiEE1AIPS1_ET_.exit.i: ; preds = %if.then.i.i, %entry
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%retval.sroa.0.0.i.i = phi %"class.K::L"* [ %Payload.i.i, %if.then.i.i ], [ undef, %entry ]
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%call4.i = call %"struct.K::M"* @_ZN1FIN1K1MEE3getEv(%struct.F* undef)
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call void @llvm.dbg.value(metadata %"struct.K::M"* %call4.i, metadata !7, metadata !11), !dbg !12
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call void @llvm.dbg.value(metadata %"struct.K::M"* %call4.i, metadata !7, metadata !18), !dbg !12
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%Handle2.i.i.i.i.i = getelementptr inbounds %"struct.K::M", %"struct.K::M"* %call4.i, i32 0, i32 0, i32 0
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%Handle.i.i.i.i.i = getelementptr inbounds %"struct.K::M", %"struct.K::M"* %call4.i, i32 0, i32 1, i32 0
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%4 = getelementptr inbounds %"class.K::L", %"class.K::L"* %retval.sroa.0.0.i.i, i32 0, i32 0, i32 0
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br label %while.body.i.i.i.i
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while.body.i.i.i.i:
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%5 = load i32, i32* %4, align 4
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%call.i.i.i.i.i.i = call i32 @_Z6get_idv(), !dbg !12
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%call.i.i.i.i.i.i.i = call zeroext i1 @_Z24__libcpp_thread_id_equalii(i32 %5, i32 %call.i.i.i.i.i.i)
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%6 = load i32, i32* %Handle2.i.i.i.i.i, align 4
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call void @_ZN23ConditionPlatformHelper4waitERii(i32* nonnull dereferenceable(4) %Handle.i.i.i.i.i, i32 %6)
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br label %while.body.i.i.i.i
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}
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declare i64 @_Z8getCacheP23ConditionPlatformHelper(%struct.ConditionPlatformHelper*) local_unnamed_addr
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declare %"struct.K::M"* @_ZN1FIN1K1MEE3getEv(%struct.F*) local_unnamed_addr
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declare %"struct.J<K::L, false, int>::Node"* @_ZN1BIPN1JIN1K1LELb0EiE4NodeEE4loadEv(%struct.B*) local_unnamed_addr
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declare i32 @_Z6get_idv() local_unnamed_addr
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declare zeroext i1 @_Z24__libcpp_thread_id_equalii(i32, i32) local_unnamed_addr
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declare void @_ZN23ConditionPlatformHelper4waitERii(i32* dereferenceable(4), i32) local_unnamed_addr
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind "no-frame-pointer-elim-non-leaf" }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "test.ii", directory: "/")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 2}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = distinct !DISubprogram(name: "swift_getGenericMetadata_arguments", linkageName: "_Z34swift_getGenericMetadata_argumentsv", scope: !0, file: !1, line: 95, type: !6, isLocal: false, isDefinition: true, scopeLine: 95, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
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!6 = !DISubroutineType(types: !2)
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!7 = !DILocalVariable(name: "criticalSection", arg: 2, scope: !8, file: !1, line: 23, type: !10)
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!8 = distinct !DISubprogram(name: "<(lambda at test.ii:28:14)>", scope: !0, file: !1, line: 23, type: !6, isLocal: false, isDefinition: true, scopeLine: 23, flags: DIFlagPrototyped, isOptimized: true, unit: !0, templateParams: !2, declaration: !9, retainedNodes: !2)
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!9 = !DISubprogram(name: "<(lambda at test.ii:28:14)>", scope: !0, file: !1, line: 23, type: !6, isLocal: false, isDefinition: false, scopeLine: 23, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: true, templateParams: !2)
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!10 = distinct !DICompositeType(tag: DW_TAG_class_type, scope: !0, file: !1, line: 28, size: 96, elements: !2)
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!11 = !DIExpression(DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 32)
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!12 = !DILocation(line: 23, column: 33, scope: !8, inlinedAt: !13)
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!13 = distinct !DILocation(line: 28, column: 5, scope: !14, inlinedAt: !16)
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!14 = distinct !DISubprogram(name: "<(lambda at test.ii:87:58)>", scope: !0, file: !1, line: 27, type: !6, isLocal: false, isDefinition: true, scopeLine: 27, flags: DIFlagPrototyped, isOptimized: true, unit: !0, templateParams: !2, declaration: !15, retainedNodes: !2)
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!15 = !DISubprogram(name: "<(lambda at test.ii:87:58)>", scope: !0, file: !1, line: 27, type: !6, isLocal: false, isDefinition: false, scopeLine: 27, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: true, templateParams: !2)
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!16 = distinct !DILocation(line: 99, column: 21, scope: !17)
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!17 = !DILexicalBlockFile(scope: !5, file: !1, discriminator: 2)
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!18 = !DIExpression(DW_OP_plus_uconst, 4, DW_OP_stack_value, DW_OP_LLVM_fragment, 64, 32)
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