mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-02-23 20:29:30 +00:00
309fcf84b8
This optimization allows the DWARF linker to reuse definition of types it has emitted in previous CUs rather than reemitting them in each CU that references them. The size and link time gains are huge. For example when linking the DWARF for a debug build of clang, this generates a ~150M dwarf file instead of a ~700M one (the numbers date back a bit and must not be totally accurate these days). As with all the other parts of the llvm-dsymutil codebase, the goal is to keep bit-for-bit compatibility with dsymutil-classic. The code is littered with a lot of FIXMEs that should be addressed once we can get rid of the compatibilty goal. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242847 91177308-0d34-0410-b5e6-96231b3b80d8
101 lines
7.0 KiB
LLVM
101 lines
7.0 KiB
LLVM
; Generated from odr6.cpp and odr-types.h by running:
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; clang -emit-llvm -g -S -std=c++11 odr6.cpp
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; ModuleID = 'odr6.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-macosx10.11.0"
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%"struct.S::Nested" = type { double }
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; Function Attrs: ssp uwtable
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define double @_Z3bazv() #0 {
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entry:
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%d = alloca %"struct.S::Nested", align 8
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call void @llvm.dbg.declare(metadata %"struct.S::Nested"* %d, metadata !39, metadata !40), !dbg !41
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call void @_ZN1S6Nested4initIdEEvT_(%"struct.S::Nested"* %d, double 0.000000e+00), !dbg !42
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%D = getelementptr inbounds %"struct.S::Nested", %"struct.S::Nested"* %d, i32 0, i32 0, !dbg !43
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%0 = load double, double* %D, align 8, !dbg !43
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ret double %0, !dbg !44
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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 ssp uwtable
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define linkonce_odr void @_ZN1S6Nested4initIdEEvT_(%"struct.S::Nested"* %this, double %Val) #2 align 2 {
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entry:
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%this.addr = alloca %"struct.S::Nested"*, align 8
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%Val.addr = alloca double, align 8
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store %"struct.S::Nested"* %this, %"struct.S::Nested"** %this.addr, align 8
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call void @llvm.dbg.declare(metadata %"struct.S::Nested"** %this.addr, metadata !45, metadata !40), !dbg !47
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store double %Val, double* %Val.addr, align 8
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call void @llvm.dbg.declare(metadata double* %Val.addr, metadata !48, metadata !40), !dbg !49
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%this1 = load %"struct.S::Nested"*, %"struct.S::Nested"** %this.addr
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%0 = load double, double* %Val.addr, align 8, !dbg !50
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%D = getelementptr inbounds %"struct.S::Nested", %"struct.S::Nested"* %this1, i32 0, i32 0, !dbg !51
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store double %0, double* %D, align 8, !dbg !52
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ret void, !dbg !53
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}
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attributes #0 = { ssp uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="core2" "target-features"="+cx16,+sse,+sse2,+sse3,+ssse3" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone }
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attributes #2 = { nounwind ssp uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="core2" "target-features"="+cx16,+sse,+sse2,+sse3,+ssse3" "unsafe-fp-math"="false" "use-soft-float"="false" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!35, !36, !37}
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!llvm.ident = !{!38}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 242534)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, retainedTypes: !3, subprograms: !24)
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!1 = !DIFile(filename: "odr6.cpp", directory: "/Inputs")
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!2 = !{}
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!3 = !{!4, !20, !23}
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!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !5, line: 1, size: 128, align: 64, elements: !6, identifier: "_ZTS1S")
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!5 = !DIFile(filename: "./odr-types.h", directory: "/Inputs")
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!6 = !{!7, !9, !10, !14, !17}
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!7 = !DIDerivedType(tag: DW_TAG_member, name: "I", scope: !"_ZTS1S", file: !5, line: 2, baseType: !8, size: 32, align: 32)
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!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!9 = !DIDerivedType(tag: DW_TAG_member, name: "D", scope: !"_ZTS1S", file: !5, line: 15, baseType: !"_ZTSN1S6NestedE", size: 64, align: 64, offset: 64)
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!10 = !DISubprogram(name: "incr", linkageName: "_ZN1S4incrEv", scope: !"_ZTS1S", file: !5, line: 4, type: !11, isLocal: false, isDefinition: false, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false)
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!11 = !DISubroutineType(types: !12)
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!12 = !{null, !13}
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!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !"_ZTS1S", size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!14 = !DISubprogram(name: "incr", linkageName: "_ZN1S4incrEi", scope: !"_ZTS1S", file: !5, line: 5, type: !15, isLocal: false, isDefinition: false, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false)
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!15 = !DISubroutineType(types: !16)
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!16 = !{null, !13, !8}
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!17 = !DISubprogram(name: "foo", linkageName: "_ZN1S3fooEv", scope: !"_ZTS1S", file: !5, line: 18, type: !18, isLocal: false, isDefinition: false, scopeLine: 18, flags: DIFlagPrototyped, isOptimized: false)
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!18 = !DISubroutineType(types: !19)
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!19 = !{!8, !13}
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!20 = !DICompositeType(tag: DW_TAG_structure_type, name: "Nested", scope: !"_ZTS1S", file: !5, line: 9, size: 64, align: 64, elements: !21, identifier: "_ZTSN1S6NestedE")
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!21 = !{!22}
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!22 = !DIDerivedType(tag: DW_TAG_member, name: "D", scope: !"_ZTSN1S6NestedE", file: !5, line: 10, baseType: !23, size: 64, align: 64)
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!23 = !DIBasicType(name: "double", size: 64, align: 64, encoding: DW_ATE_float)
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!24 = !{!25, !28}
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!25 = !DISubprogram(name: "baz", linkageName: "_Z3bazv", scope: !1, file: !1, line: 3, type: !26, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, function: double ()* @_Z3bazv, variables: !2)
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!26 = !DISubroutineType(types: !27)
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!27 = !{!23}
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!28 = !DISubprogram(name: "init<double>", linkageName: "_ZN1S6Nested4initIdEEvT_", scope: !"_ZTSN1S6NestedE", file: !5, line: 12, type: !29, isLocal: false, isDefinition: true, scopeLine: 12, flags: DIFlagPrototyped, isOptimized: false, function: void (%"struct.S::Nested"*, double)* @_ZN1S6Nested4initIdEEvT_, templateParams: !32, declaration: !34, variables: !2)
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!29 = !DISubroutineType(types: !30)
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!30 = !{null, !31, !23}
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!31 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !"_ZTSN1S6NestedE", size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!32 = !{!33}
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!33 = !DITemplateTypeParameter(name: "T", type: !23)
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!34 = !DISubprogram(name: "init<double>", linkageName: "_ZN1S6Nested4initIdEEvT_", scope: !"_ZTSN1S6NestedE", file: !5, line: 12, type: !29, isLocal: false, isDefinition: false, scopeLine: 12, flags: DIFlagPrototyped, isOptimized: false, templateParams: !32)
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!35 = !{i32 2, !"Dwarf Version", i32 2}
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!36 = !{i32 2, !"Debug Info Version", i32 3}
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!37 = !{i32 1, !"PIC Level", i32 2}
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!38 = !{!"clang version 3.8.0 (trunk 242534)"}
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!39 = !DILocalVariable(tag: DW_TAG_auto_variable, name: "d", scope: !25, file: !1, line: 4, type: !"_ZTSN1S6NestedE")
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!40 = !DIExpression()
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!41 = !DILocation(line: 4, column: 12, scope: !25)
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!42 = !DILocation(line: 5, column: 2, scope: !25)
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!43 = !DILocation(line: 6, column: 11, scope: !25)
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!44 = !DILocation(line: 6, column: 2, scope: !25)
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!45 = !DILocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, scope: !28, type: !46, flags: DIFlagArtificial | DIFlagObjectPointer)
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!46 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !"_ZTSN1S6NestedE", size: 64, align: 64)
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!47 = !DILocation(line: 0, scope: !28)
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!48 = !DILocalVariable(tag: DW_TAG_arg_variable, name: "Val", arg: 2, scope: !28, file: !5, line: 12, type: !23)
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!49 = !DILocation(line: 12, column: 36, scope: !28)
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!50 = !DILocation(line: 12, column: 54, scope: !28)
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!51 = !DILocation(line: 12, column: 43, scope: !28)
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!52 = !DILocation(line: 12, column: 45, scope: !28)
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!53 = !DILocation(line: 12, column: 60, scope: !28)
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