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Currently each Function points to a DISubprogram and DISubprogram has a scope field. For member functions the scope is a DICompositeType. DIScopes point to the DICompileUnit to facilitate type uniquing. Distinct DISubprograms (with isDefinition: true) are not part of the type hierarchy and cannot be uniqued. This change removes the subprograms list from DICompileUnit and instead adds a pointer to the owning compile unit to distinct DISubprograms. This would make it easy for ThinLTO to strip unneeded DISubprograms and their transitively referenced debug info. Motivation ---------- Materializing DISubprograms is currently the most expensive operation when doing a ThinLTO build of clang. We want the DISubprogram to be stored in a separate Bitcode block (or the same block as the function body) so we can avoid having to expensively deserialize all DISubprograms together with the global metadata. If a function has been inlined into another subprogram we need to store a reference the block containing the inlined subprogram. Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script that updates LLVM IR testcases to the new format. http://reviews.llvm.org/D19034 <rdar://problem/25256815> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266446 91177308-0d34-0410-b5e6-96231b3b80d8
97 lines
6.0 KiB
LLVM
97 lines
6.0 KiB
LLVM
; RUN: llc < %s - | FileCheck %s
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target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:64-v128:32:128-a0:0:32-n32"
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target triple = "thumbv7-apple-macosx10.6.7"
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;CHECK: sub-register DW_OP_regx
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;CHECK-NEXT: 256
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;CHECK-NEXT: DW_OP_piece
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;CHECK-NEXT: 8
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;CHECK-NEXT: sub-register DW_OP_regx
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;CHECK-NEXT: 257
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;CHECK-NEXT: DW_OP_piece
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;CHECK-NEXT: 8
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@.str = external constant [13 x i8]
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declare <4 x float> @test0001(float) nounwind readnone ssp
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define i32 @main(i32 %argc, i8** nocapture %argv) nounwind ssp !dbg !10 {
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entry:
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br label %for.body9
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for.body9: ; preds = %for.body9, %entry
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%add19 = fadd <4 x float> undef, <float 0.000000e+00, float 0.000000e+00, float 0.000000e+00, float 1.000000e+00>, !dbg !39
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br i1 undef, label %for.end54, label %for.body9, !dbg !44
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for.end54: ; preds = %for.body9
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tail call void @llvm.dbg.value(metadata <4 x float> %add19, i64 0, metadata !27, metadata !DIExpression()), !dbg !39
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%tmp115 = extractelement <4 x float> %add19, i32 1
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%conv6.i75 = fpext float %tmp115 to double, !dbg !45
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%call.i82 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i32 0, i32 0), double undef, double %conv6.i75, double undef, double undef) nounwind, !dbg !45
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ret i32 0, !dbg !49
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}
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declare i32 @printf(i8* nocapture, ...) nounwind
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!56}
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!0 = distinct !DISubprogram(name: "test0001", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, scopeLine: 3, file: !54, scope: !1, type: !3, variables: !51)
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!1 = !DIFile(filename: "build2.c", directory: "/private/tmp")
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.0 (trunk 129915)", isOptimized: true, emissionKind: FullDebug, file: !54, enums: !{}, retainedTypes: !{}, imports: null)
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!3 = !DISubroutineType(types: !4)
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!4 = !{!5}
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!5 = !DIDerivedType(tag: DW_TAG_typedef, name: "v4f32", line: 14, file: !54, scope: !2, baseType: !6)
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!6 = !DICompositeType(tag: DW_TAG_array_type, size: 128, align: 128, file: !1, baseType: !7, elements: !8)
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!7 = !DIBasicType(tag: DW_TAG_base_type, name: "float", size: 32, align: 32, encoding: DW_ATE_float)
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!8 = !{!9}
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!9 = !DISubrange(count: 4)
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!10 = distinct !DISubprogram(name: "main", line: 59, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, scopeLine: 59, file: !54, scope: !1, type: !11, variables: !52)
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!11 = !DISubroutineType(types: !12)
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!12 = !{!13}
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!13 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!14 = distinct !DISubprogram(name: "printFV", line: 41, isLocal: true, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, scopeLine: 41, file: !55, scope: !15, type: !16, variables: !53)
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!15 = !DIFile(filename: "/Volumes/Lalgate/work/llvm/projects/llvm-test/SingleSource/UnitTests/Vector/helpers.h", directory: "/private/tmp")
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!16 = !DISubroutineType(types: !17)
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!17 = !{null}
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!18 = !DILocalVariable(name: "a", line: 3, arg: 1, scope: !0, file: !1, type: !7)
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!19 = !DILocalVariable(name: "argc", line: 59, arg: 1, scope: !10, file: !1, type: !13)
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!20 = !DILocalVariable(name: "argv", line: 59, arg: 2, scope: !10, file: !1, type: !21)
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!21 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, scope: !2, baseType: !22)
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!22 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, scope: !2, baseType: !23)
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!23 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!24 = !DILocalVariable(name: "i", line: 60, scope: !25, file: !1, type: !13)
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!25 = distinct !DILexicalBlock(line: 59, column: 33, file: !54, scope: !10)
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!26 = !DILocalVariable(name: "j", line: 60, scope: !25, file: !1, type: !13)
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!27 = !DILocalVariable(name: "x", line: 61, scope: !25, file: !1, type: !5)
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!28 = !DILocalVariable(name: "y", line: 62, scope: !25, file: !1, type: !5)
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!29 = !DILocalVariable(name: "z", line: 63, scope: !25, file: !1, type: !5)
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!30 = !DILocalVariable(name: "F", line: 41, arg: 1, scope: !14, file: !15, type: !31)
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!31 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, scope: !2, baseType: !32)
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!32 = !DIDerivedType(tag: DW_TAG_typedef, name: "FV", line: 25, file: !55, scope: !2, baseType: !33)
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!33 = !DICompositeType(tag: DW_TAG_union_type, line: 22, size: 128, align: 128, file: !55, scope: !2, elements: !34)
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!34 = !{!35, !37}
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!35 = !DIDerivedType(tag: DW_TAG_member, name: "V", line: 23, size: 128, align: 128, file: !55, scope: !15, baseType: !36)
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!36 = !DIDerivedType(tag: DW_TAG_typedef, name: "v4sf", line: 3, file: !55, scope: !2, baseType: !6)
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!37 = !DIDerivedType(tag: DW_TAG_member, name: "A", line: 24, size: 128, align: 32, file: !55, scope: !15, baseType: !38)
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!38 = !DICompositeType(tag: DW_TAG_array_type, size: 128, align: 32, scope: !2, baseType: !7, elements: !8)
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!39 = !DILocation(line: 79, column: 7, scope: !40)
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!40 = distinct !DILexicalBlock(line: 75, column: 35, file: !54, scope: !41)
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!41 = distinct !DILexicalBlock(line: 75, column: 5, file: !54, scope: !42)
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!42 = distinct !DILexicalBlock(line: 71, column: 32, file: !54, scope: !43)
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!43 = distinct !DILexicalBlock(line: 71, column: 3, file: !54, scope: !25)
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!44 = !DILocation(line: 75, column: 5, scope: !42)
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!45 = !DILocation(line: 42, column: 2, scope: !46, inlinedAt: !48)
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!46 = distinct !DILexicalBlock(line: 42, column: 2, file: !55, scope: !47)
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!47 = distinct !DILexicalBlock(line: 41, column: 28, file: !55, scope: !14)
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!48 = !DILocation(line: 95, column: 3, scope: !25)
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!49 = !DILocation(line: 99, column: 3, scope: !25)
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!51 = !{!18}
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!52 = !{!19, !20, !24, !26, !27, !28, !29}
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!53 = !{!30}
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!54 = !DIFile(filename: "build2.c", directory: "/private/tmp")
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!55 = !DIFile(filename: "/Volumes/Lalgate/work/llvm/projects/llvm-test/SingleSource/UnitTests/Vector/helpers.h", directory: "/private/tmp")
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!56 = !{i32 1, !"Debug Info Version", i32 3}
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