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fb3abba237
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> llvm-svn: 266446
39 lines
2.3 KiB
LLVM
39 lines
2.3 KiB
LLVM
; RUN: llc -O1 < %s
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; REQUIRES: default_triple
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; ModuleID = 'pr6157.bc'
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; formerly crashed in SelectionDAGBuilder
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%tart.reflect.ComplexType = type { double, double }
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@.type.SwitchStmtTest = constant %tart.reflect.ComplexType { double 3.0, double 2.0 }
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define i32 @"main(tart.core.String[])->int32"(i32 %args) {
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entry:
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tail call void @llvm.dbg.value(metadata %tart.reflect.ComplexType* @.type.SwitchStmtTest, i64 0, metadata !8, metadata !DIExpression()), !dbg !DILocation(scope: !9)
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tail call void @"tart.reflect.ComplexType.create->tart.core.Object"(%tart.reflect.ComplexType* @.type.SwitchStmtTest) ; <%tart.core.Object*> [#uses=2]
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ret i32 3
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}
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone
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declare void @"tart.reflect.ComplexType.create->tart.core.Object"(%tart.reflect.ComplexType*) nounwind readnone
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!llvm.dbg.cu = !{!0}
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!0 = distinct !DICompileUnit(language: DW_LANG_C89, producer: "4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", isOptimized: true, emissionKind: FullDebug, file: !15, enums: !16, retainedTypes: !16)
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!1 = !DIDerivedType(tag: DW_TAG_const_type, size: 192, align: 64, file: !15, scope: !0, baseType: !2)
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!2 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", line: 1, size: 192, align: 64, file: !15, scope: !0, elements: !3)
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!3 = !{!4, !6, !7}
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!4 = !DIDerivedType(tag: DW_TAG_member, name: "x", line: 1, size: 64, align: 64, file: !15, scope: !2, baseType: !5)
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!5 = !DIBasicType(tag: DW_TAG_base_type, name: "double", size: 64, align: 64, encoding: DW_ATE_float)
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!6 = !DIDerivedType(tag: DW_TAG_member, name: "y", line: 1, size: 64, align: 64, offset: 64, file: !15, scope: !2, baseType: !5)
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!7 = !DIDerivedType(tag: DW_TAG_member, name: "z", line: 1, size: 64, align: 64, offset: 128, file: !15, scope: !2, baseType: !5)
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!8 = !DILocalVariable(name: "t", line: 5, scope: !9, file: !0, type: !2)
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!9 = distinct !DILexicalBlock(line: 0, column: 0, file: null, scope: !10)
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!10 = distinct !DISubprogram(name: "foo", linkageName: "foo", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !0, scope: !0, type: !11)
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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 = !{%tart.reflect.ComplexType* @.type.SwitchStmtTest}
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!15 = !DIFile(filename: "sm.c", directory: "")
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!16 = !{i32 0}
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