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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
52 lines
2.7 KiB
LLVM
52 lines
2.7 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-macosx -enable-misched \
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; RUN: -verify-machineinstrs | FileCheck %s
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;
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; Test LiveInterval update handling of DBG_VALUE.
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; rdar://12777252.
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;
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; CHECK: %entry
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; CHECK: DEBUG_VALUE: subdivp:hg
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; CHECK: j
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%struct.node.0.27 = type { i16, double, [3 x double], i32, i32 }
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%struct.hgstruct.2.29 = type { %struct.bnode.1.28*, [3 x double], double, [3 x double] }
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%struct.bnode.1.28 = type { i16, double, [3 x double], i32, i32, [3 x double], [3 x double], [3 x double], double, %struct.bnode.1.28*, %struct.bnode.1.28* }
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declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
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define signext i16 @subdivp(%struct.node.0.27* nocapture %p, double %dsq, double %tolsq, %struct.hgstruct.2.29* nocapture byval align 8 %hg) nounwind uwtable readonly ssp !dbg !14 {
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entry:
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call void @llvm.dbg.declare(metadata %struct.hgstruct.2.29* %hg, metadata !4, metadata !DIExpression()), !dbg !DILocation(scope: !14)
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%type = getelementptr inbounds %struct.node.0.27, %struct.node.0.27* %p, i64 0, i32 0
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%0 = load i16, i16* %type, align 2
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%cmp = icmp eq i16 %0, 1
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br i1 %cmp, label %return, label %for.cond.preheader
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for.cond.preheader: ; preds = %entry
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%arrayidx6.1 = getelementptr inbounds %struct.hgstruct.2.29, %struct.hgstruct.2.29* %hg, i64 0, i32 1, i64 1
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%cmp22 = fcmp olt double 0.000000e+00, %dsq
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%conv24 = zext i1 %cmp22 to i16
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br label %return
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return: ; preds = %for.cond.preheader, %entry
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%retval.0 = phi i16 [ %conv24, %for.cond.preheader ], [ 0, %entry ]
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ret i16 %retval.0
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}
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!12}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.3 (trunk 168918) (llvm/trunk 168920)", isOptimized: true, emissionKind: FullDebug, file: !11, enums: !2, retainedTypes: !2, globals: !2)
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!2 = !{}
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!4 = !DILocalVariable(name: "hg", line: 725, arg: 4, scope: !14, file: !5, type: !6)
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!5 = !DIFile(filename: "MultiSource/Benchmarks/Olden/bh/newbh.c", directory: "MultiSource/Benchmarks/Olden/bh")
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!6 = !DIDerivedType(tag: DW_TAG_typedef, name: "hgstruct", line: 492, file: !11, baseType: !7)
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!7 = !DICompositeType(tag: DW_TAG_structure_type, line: 487, size: 512, align: 64, file: !11)
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!11 = !DIFile(filename: "MultiSource/Benchmarks/Olden/bh/newbh.c", directory: "MultiSource/Benchmarks/Olden/bh")
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!12 = !{i32 1, !"Debug Info Version", i32 3}
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!14 = distinct !DISubprogram(name: "subdivp", isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 1, file: !11, scope: !5, type: !15)
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!15 = !DISubroutineType(types: !16)
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!16 = !{null}
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