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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
71 lines
3.8 KiB
LLVM
71 lines
3.8 KiB
LLVM
; RUN: llc < %s -mcpu=generic -mtriple=i386-apple-darwin -no-integrated-as
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@g1 = global double 0.000000e+00, align 8
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@g2 = global i32 0, align 4
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define void @_Z16fpuop_arithmeticjj(i32, i32) !dbg !4 {
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entry:
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switch i32 undef, label %sw.bb.i1921 [
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]
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sw.bb261: ; preds = %entry, %entry
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unreachable
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sw.bb.i1921: ; preds = %if.end504
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switch i32 undef, label %if.end511 [
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i32 1, label %sw.bb27.i
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]
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sw.bb27.i: ; preds = %sw.bb.i1921
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%conv.i.i1923 = fpext float undef to x86_fp80
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br label %if.end511
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if.end511: ; preds = %sw.bb27.i, %sw.bb13.i
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%src.sroa.0.0.src.sroa.0.0.2280 = phi x86_fp80 [ %conv.i.i1923, %sw.bb27.i ], [ undef, %sw.bb.i1921 ]
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switch i32 undef, label %sw.bb992 [
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i32 3, label %sw.bb735
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i32 18, label %if.end41.i2210
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]
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sw.bb735: ; preds = %if.end511
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%2 = call x86_fp80 asm sideeffect "frndint", "={st},0,~{dirflag},~{fpsr},~{flags}"(x86_fp80 %src.sroa.0.0.src.sroa.0.0.2280)
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unreachable
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if.end41.i2210: ; preds = %if.end511
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call void @llvm.dbg.value(metadata x86_fp80 %src.sroa.0.0.src.sroa.0.0.2280, i64 0, metadata !20, metadata !DIExpression()), !dbg !DILocation(scope: !4)
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unreachable
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sw.bb992: ; preds = %if.end511
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ret void
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}
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!24, !25}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 (http://llvm.org/git/clang 8444ae7cfeaefae031f8fedf0d1435ca3b14d90b) (http://llvm.org/git/llvm 886f0101a7d176543b831f5efb74c03427244a55)", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !21, imports: !2)
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!1 = !DIFile(filename: "fpu_ieee.cpp", directory: "x87stackifier")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "fpuop_arithmetic", linkageName: "_Z16fpuop_arithmeticjj", line: 11, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 13, file: !5, scope: !6, type: !7, variables: !10)
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!5 = !DIFile(filename: "f1.cpp", directory: "x87stackifier")
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!6 = !DIFile(filename: "f1.cpp", directory: "x87stackifier")
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!7 = !DISubroutineType(types: !8)
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!8 = !{null, !9, !9}
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!9 = !DIBasicType(tag: DW_TAG_base_type, name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
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!10 = !{!11, !12, !13, !18, !20}
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!11 = !DILocalVariable(name: "", line: 11, arg: 1, scope: !4, file: !6, type: !9)
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!12 = !DILocalVariable(name: "", line: 11, arg: 2, scope: !4, file: !6, type: !9)
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!13 = !DILocalVariable(name: "x", line: 14, scope: !4, file: !6, type: !14)
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!14 = !DIDerivedType(tag: DW_TAG_typedef, name: "fpu_extended", line: 3, file: !5, baseType: !15)
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!15 = !DIDerivedType(tag: DW_TAG_typedef, name: "fpu_register", line: 2, file: !5, baseType: !16)
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!16 = !DIDerivedType(tag: DW_TAG_typedef, name: "uae_f64", line: 1, file: !5, baseType: !17)
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!17 = !DIBasicType(tag: DW_TAG_base_type, name: "long double", size: 128, align: 128, encoding: DW_ATE_float)
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!18 = !DILocalVariable(name: "a", line: 15, scope: !4, file: !6, type: !19)
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!19 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!20 = !DILocalVariable(name: "value", line: 16, scope: !4, file: !6, type: !14)
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!21 = !{!22, !23}
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!22 = !DIGlobalVariable(name: "g1", line: 5, isLocal: false, isDefinition: true, scope: null, file: !6, type: !14, variable: double* @g1)
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!23 = !DIGlobalVariable(name: "g2", line: 6, isLocal: false, isDefinition: true, scope: null, file: !6, type: !19, variable: i32* @g2)
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!24 = !{i32 2, !"Dwarf Version", i32 2}
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!25 = !{i32 2, !"Debug Info Version", i32 3}
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