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5b721561aa
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 llvm-svn: 252219
60 lines
3.2 KiB
LLVM
60 lines
3.2 KiB
LLVM
; RUN: llvm-link %s %p/DbgDeclare2.ll -o %t.bc
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; RUN: llvm-dis < %t.bc | FileCheck %s
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; Test if metadata in dbg.declare is mapped properly or not.
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; rdar://13089880
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; CHECK: define i32 @main(i32 %argc, i8** %argv)
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; CHECK: call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !{{[0-9]+}}, metadata {{.*}})
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; CHECK: call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !{{[0-9]+}}, metadata {{.*}})
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; CHECK: define void @test(i32 %argc, i8** %argv)
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; CHECK: call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !{{[0-9]+}}, metadata {{.*}})
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; CHECK: call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !{{[0-9]+}}, metadata {{.*}})
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; CHECK: call void @llvm.dbg.declare(metadata i32* %i, metadata !{{[0-9]+}}, metadata {{.*}})
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.9.0"
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define i32 @main(i32 %argc, i8** %argv) uwtable ssp !dbg !5 {
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entry:
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%retval = alloca i32, align 4
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%argc.addr = alloca i32, align 4
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%argv.addr = alloca i8**, align 8
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store i32 0, i32* %retval
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store i32 %argc, i32* %argc.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !14, metadata !DIExpression()), !dbg !15
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store i8** %argv, i8*** %argv.addr, align 8
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call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !16, metadata !DIExpression()), !dbg !15
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%0 = load i32, i32* %argc.addr, align 4, !dbg !17
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%1 = load i8**, i8*** %argv.addr, align 8, !dbg !17
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call void @test(i32 %0, i8** %1), !dbg !17
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ret i32 0, !dbg !19
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}
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declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
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declare void @test(i32, i8**)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!21}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.3 (trunk 173515)", isOptimized: true, emissionKind: 0, file: !20, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2)
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!2 = !{}
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!3 = !{!5}
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!5 = distinct !DISubprogram(name: "main", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 4, file: !20, scope: null, type: !7, variables: !2)
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!6 = !DIFile(filename: "main.cpp", directory: "/private/tmp")
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!7 = !DISubroutineType(types: !8)
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!8 = !{!9, !9, !10}
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!9 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!10 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !11)
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !12)
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!12 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !13)
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!13 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!14 = !DILocalVariable(name: "argc", line: 3, arg: 1, scope: !5, file: !6, type: !9)
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!15 = !DILocation(line: 3, scope: !5)
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!16 = !DILocalVariable(name: "argv", line: 3, arg: 2, scope: !5, file: !6, type: !10)
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!17 = !DILocation(line: 5, scope: !18)
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!18 = distinct !DILexicalBlock(line: 4, column: 0, file: !20, scope: !5)
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!19 = !DILocation(line: 6, scope: !18)
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!20 = !DIFile(filename: "main.cpp", directory: "/private/tmp")
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!21 = !{i32 1, !"Debug Info Version", i32 3}
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