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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
78 lines
3.9 KiB
LLVM
78 lines
3.9 KiB
LLVM
; This file is used by 2011-08-04-DebugLoc.ll, so it doesn't actually do anything itself
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;
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; RUN: true
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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 void @test(i32 %argc, i8** %argv) uwtable ssp !dbg !5 {
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entry:
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%argc.addr = alloca i32, align 4
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%argv.addr = alloca i8**, align 8
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%i = alloca i32, align 4
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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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call void @llvm.dbg.declare(metadata i32* %i, metadata !17, metadata !DIExpression()), !dbg !20
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store i32 0, i32* %i, align 4, !dbg !20
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br label %for.cond, !dbg !20
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for.cond: ; preds = %for.inc, %entry
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%0 = load i32, i32* %i, align 4, !dbg !20
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%1 = load i32, i32* %argc.addr, align 4, !dbg !20
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%cmp = icmp slt i32 %0, %1, !dbg !20
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br i1 %cmp, label %for.body, label %for.end, !dbg !20
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for.body: ; preds = %for.cond
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%2 = load i32, i32* %i, align 4, !dbg !21
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%idxprom = sext i32 %2 to i64, !dbg !21
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%3 = load i8**, i8*** %argv.addr, align 8, !dbg !21
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%arrayidx = getelementptr inbounds i8*, i8** %3, i64 %idxprom, !dbg !21
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%4 = load i8*, i8** %arrayidx, align 8, !dbg !21
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%call = call i32 @puts(i8* %4), !dbg !21
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br label %for.inc, !dbg !23
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for.inc: ; preds = %for.body
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%5 = load i32, i32* %i, align 4, !dbg !20
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%inc = add nsw i32 %5, 1, !dbg !20
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store i32 %inc, i32* %i, align 4, !dbg !20
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br label %for.cond, !dbg !20
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for.end: ; preds = %for.cond
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ret void, !dbg !24
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}
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declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
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declare i32 @puts(i8*)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!27}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.3 (trunk 173515)", isOptimized: true, emissionKind: FullDebug, file: !25, enums: !2, retainedTypes: !2, globals: !2)
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!2 = !{}
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!5 = distinct !DISubprogram(name: "print_args", linkageName: "test", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 5, file: !26, scope: null, type: !7, variables: !2)
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!6 = !DIFile(filename: "test.cpp", directory: "/private/tmp")
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!7 = !DISubroutineType(types: !8)
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!8 = !{null, !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: 4, arg: 1, scope: !5, file: !6, type: !9)
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!15 = !DILocation(line: 4, scope: !5)
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!16 = !DILocalVariable(name: "argv", line: 4, arg: 2, scope: !5, file: !6, type: !10)
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!17 = !DILocalVariable(name: "i", line: 6, scope: !18, file: !6, type: !9)
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!18 = distinct !DILexicalBlock(line: 6, column: 0, file: !26, scope: !19)
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!19 = distinct !DILexicalBlock(line: 5, column: 0, file: !26, scope: !5)
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!20 = !DILocation(line: 6, scope: !18)
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!21 = !DILocation(line: 8, scope: !22)
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!22 = distinct !DILexicalBlock(line: 7, column: 0, file: !26, scope: !18)
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!23 = !DILocation(line: 9, scope: !22)
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!24 = !DILocation(line: 10, scope: !19)
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!25 = !DIFile(filename: "main.cpp", directory: "/private/tmp")
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!26 = !DIFile(filename: "test.cpp", directory: "/private/tmp")
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!27 = !{i32 1, !"Debug Info Version", i32 3}
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