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5f220beefc
Previously, subprograms contained a metadata reference to the function they described. Because most clients need to get or set a subprogram for a given function rather than the other way around, this created unneeded inefficiency. For example, many passes needed to call the function llvm::makeSubprogramMap() to build a mapping from functions to subprograms, and the IR linker needed to fix up function references in a way that caused quadratic complexity in the IR linking phase of LTO. This change reverses the direction of the edge by storing the subprogram as function-level metadata and removing DISubprogram's function field. Since this is an IR change, a bitcode upgrade has been provided. Fixes PR23367. An upgrade script for textual IR for out-of-tree clients is attached to the PR. Differential Revision: http://reviews.llvm.org/D14265 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252219 91177308-0d34-0410-b5e6-96231b3b80d8
87 lines
5.0 KiB
LLVM
87 lines
5.0 KiB
LLVM
; RUN: true
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; This file belongs to type-unique-simple2-a.ll.
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;
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; $ cat b.cpp
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; #include "ab.h"
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; void A::setFoo() {}
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; const
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; foo_t A::getFoo() { return 1; }
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; ModuleID = 'b.cpp'
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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-macosx10.9.0"
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%class.A = type { i32 (...)** }
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@_ZTV1A = unnamed_addr constant [4 x i8*] [i8* null, i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast (void (%class.A*)* @_ZN1A6setFooEv to i8*), i8* bitcast (i32 (%class.A*)* @_ZN1A6getFooEv to i8*)]
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@_ZTVN10__cxxabiv117__class_type_infoE = external global i8*
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@_ZTS1A = constant [3 x i8] c"1A\00"
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@_ZTI1A = unnamed_addr constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv117__class_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @_ZTS1A, i32 0, i32 0) }
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; Function Attrs: nounwind
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define void @_ZN1A6setFooEv(%class.A* %this) unnamed_addr #0 align 2 !dbg !26 {
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entry:
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%this.addr = alloca %class.A*, align 8
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store %class.A* %this, %class.A** %this.addr, align 8
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call void @llvm.dbg.declare(metadata %class.A** %this.addr, metadata !32, metadata !DIExpression()), !dbg !34
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%this1 = load %class.A*, %class.A** %this.addr
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ret void, !dbg !35
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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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; Function Attrs: nounwind
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define i32 @_ZN1A6getFooEv(%class.A* %this) unnamed_addr #0 align 2 !dbg !28 {
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entry:
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%this.addr = alloca %class.A*, align 8
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store %class.A* %this, %class.A** %this.addr, align 8
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call void @llvm.dbg.declare(metadata %class.A** %this.addr, metadata !36, metadata !DIExpression()), !dbg !37
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%this1 = load %class.A*, %class.A** %this.addr
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ret i32 1, !dbg !38
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}
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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 = !{!29, !30}
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!llvm.ident = !{!31}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5 ", isOptimized: false, emissionKind: 0, file: !1, enums: !2, retainedTypes: !3, subprograms: !25, globals: !2, imports: !2)
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!1 = !DIFile(filename: "<unknown>", 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: 64, align: 64, file: !5, elements: !6, vtableHolder: !"_ZTS1A", identifier: "_ZTS1A")
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!5 = !DIFile(filename: "./ab.h", directory: "")
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!6 = !{!7, !14, !19}
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!7 = !DIDerivedType(tag: DW_TAG_member, name: "_vptr$A", size: 64, flags: DIFlagArtificial, file: !5, scope: !8, baseType: !9)
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!8 = !DIFile(filename: "./ab.h", directory: "")
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!9 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, baseType: !10)
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!10 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "__vtbl_ptr_type", size: 64, baseType: !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 = !DISubprogram(name: "setFoo", linkageName: "_ZN1A6setFooEv", line: 4, isLocal: false, isDefinition: false, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 6, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: false, scopeLine: 4, file: !5, scope: !"_ZTS1A", type: !15, containingType: !"_ZTS1A")
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!15 = !DISubroutineType(types: !16)
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!16 = !{null, !17}
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!17 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS1A")
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!19 = !DISubprogram(name: "getFoo", linkageName: "_ZN1A6getFooEv", line: 5, isLocal: false, isDefinition: false, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 6, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: false, scopeLine: 5, file: !5, scope: !"_ZTS1A", type: !20, containingType: !"_ZTS1A")
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!20 = !DISubroutineType(types: !21)
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!21 = !{!22, !17}
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!22 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !23)
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!23 = !DIDerivedType(tag: DW_TAG_typedef, name: "foo_t", line: 1, file: !5, baseType: !13)
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!25 = !{!26, !28}
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!26 = distinct !DISubprogram(name: "setFoo", linkageName: "_ZN1A6setFooEv", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: false, scopeLine: 2, file: !27, scope: !"_ZTS1A", type: !15, declaration: !14, variables: !2)
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!27 = !DIFile(filename: "b.cpp", directory: "")
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!28 = distinct !DISubprogram(name: "getFoo", linkageName: "_ZN1A6getFooEv", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: false, scopeLine: 4, file: !27, scope: !"_ZTS1A", type: !20, declaration: !19, variables: !2)
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!29 = !{i32 2, !"Dwarf Version", i32 2}
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!30 = !{i32 1, !"Debug Info Version", i32 3}
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!31 = !{!"clang version 3.5 "}
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!32 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !26, type: !33)
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!33 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS1A")
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!34 = !DILocation(line: 0, scope: !26)
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!35 = !DILocation(line: 2, scope: !26)
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!36 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !28, type: !33)
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!37 = !DILocation(line: 0, scope: !28)
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!38 = !DILocation(line: 4, scope: !28)
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