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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
99 lines
4.6 KiB
LLVM
99 lines
4.6 KiB
LLVM
; ModuleID = '/tmp/odr-lambda-1.ii'
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; RUN: llvm-link %s %p/Inputs/odr-lambda-2.ll -S -o - 2>&1 | FileCheck %s
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; When materializing the ODR-uniqued types they may be resolved to types from a
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; previously loaded module. Don't treat this as an error.
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; CHECK-NOT: ignoring invalid debug info
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; CHECK: !llvm.dbg.cu = !{!{{[0-9]+}}, !{{[0-9]+}}}
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; CHECK: distinct !DICompositeType(tag: DW_TAG_class_type, {{.*}}identifier: "_ZTSZ12consumeError5ErrorEUlvE_")
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; CHECK-NOT: identifier: "_ZTSZ12consumeError5ErrorEUlvE_"
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; generated from:
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; clang++ -x c++ -std=c++14 -fPIC -flto -g -fno-exceptions -fno-rtti
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; class Error {};
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; template <typename HandlerTs>
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; void handleAllErrors(HandlerTs Handlers) {}
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; inline void consumeError(Error Err) {
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; handleAllErrors( []() {});
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; }
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; void ArchiveMemberHeader()
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; {
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; consumeError(Error());
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; }
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source_filename = "/tmp/odr-lambda-1.ii"
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.13.0"
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%class.Error = type { i8 }
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%class.anon = type { i8 }
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; Function Attrs: noinline nounwind optnone ssp uwtable
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define void @_Z19ArchiveMemberHeaderv() #0 !dbg !8 {
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entry:
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%agg.tmp = alloca %class.Error, align 1
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call void @_Z12consumeError5Error(), !dbg !11
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ret void, !dbg !12
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}
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; Function Attrs: noinline nounwind optnone ssp uwtable
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define linkonce_odr void @_Z12consumeError5Error() #0 !dbg !13 {
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entry:
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%Err = alloca %class.Error, align 1
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%agg.tmp = alloca %class.anon, align 1
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call void @llvm.dbg.declare(metadata %class.Error* %Err, metadata !17, metadata !DIExpression()), !dbg !18
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call void @_Z15handleAllErrorsIZ12consumeError5ErrorEUlvE_EvT_(), !dbg !19
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ret void, !dbg !20
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: noinline nounwind optnone ssp uwtable
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define linkonce_odr void @_Z15handleAllErrorsIZ12consumeError5ErrorEUlvE_EvT_() #0 !dbg !21 {
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entry:
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%Handlers = alloca %class.anon, align 1
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call void @llvm.dbg.declare(metadata %class.anon* %Handlers, metadata !27, metadata !DIExpression()), !dbg !28
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ret void, !dbg !29
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}
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attributes #0 = { noinline nounwind optnone ssp uwtable }
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attributes #1 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!llvm.ident = !{!7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 6.0.0 (trunk 315772) (llvm/trunk 315773)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "/tmp/odr-lambda-1.ii", directory: "/Data")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{i32 7, !"PIC Level", i32 2}
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!7 = !{!"clang version 6.0.0 (trunk 315772) (llvm/trunk 315773)"}
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!8 = distinct !DISubprogram(name: "ArchiveMemberHeader", linkageName: "_Z19ArchiveMemberHeaderv", scope: !1, file: !1, line: 7, type: !9, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!9 = !DISubroutineType(types: !10)
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!10 = !{null}
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!11 = !DILocation(line: 9, column: 3, scope: !8)
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!12 = !DILocation(line: 10, column: 1, scope: !8)
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!13 = distinct !DISubprogram(name: "consumeError", linkageName: "_Z12consumeError5Error", scope: !1, file: !1, line: 4, type: !14, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!14 = !DISubroutineType(types: !15)
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!15 = !{null, !16}
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!16 = distinct !DICompositeType(tag: DW_TAG_class_type, name: "Error", file: !1, line: 1, size: 8, elements: !2, identifier: "_ZTS5Error")
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!17 = !DILocalVariable(name: "Err", arg: 1, scope: !13, file: !1, line: 4, type: !16)
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!18 = !DILocation(line: 4, column: 32, scope: !13)
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!19 = !DILocation(line: 5, column: 3, scope: !13)
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!20 = !DILocation(line: 6, column: 1, scope: !13)
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!21 = distinct !DISubprogram(name: "handleAllErrors<(lambda at /tmp/odr-lambda-1.ii:5:20)>", linkageName: "_Z15handleAllErrorsIZ12consumeError5ErrorEUlvE_EvT_", scope: !1, file: !1, line: 3, type: !22, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, templateParams: !25, retainedNodes: !2)
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!22 = !DISubroutineType(types: !23)
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!23 = !{null, !24}
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!24 = distinct !DICompositeType(tag: DW_TAG_class_type, scope: !13, file: !1, line: 5, size: 8, elements: !2, identifier: "_ZTSZ12consumeError5ErrorEUlvE_")
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!25 = !{!26}
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!26 = !DITemplateTypeParameter(name: "HandlerTs", type: !24)
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!27 = !DILocalVariable(name: "Handlers", arg: 1, scope: !21, file: !1, line: 3, type: !24)
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!28 = !DILocation(line: 3, column: 32, scope: !21)
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!29 = !DILocation(line: 3, column: 43, scope: !21)
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