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llvm-6502/test/tools/dsymutil/Inputs/odr6.ll

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[dsymutil] Implement ODR uniquing for C++ code. 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
2015-07-21 22:41:43 +00:00
; Generated from odr6.cpp and odr-types.h by running:
; clang -emit-llvm -g -S -std=c++11 odr6.cpp
; ModuleID = 'odr6.cpp'
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.11.0"
%"struct.S::Nested" = type { double }
; Function Attrs: ssp uwtable
define double @_Z3bazv() #0 {
entry:
%d = alloca %"struct.S::Nested", align 8
call void @llvm.dbg.declare(metadata %"struct.S::Nested"* %d, metadata !39, metadata !40), !dbg !41
call void @_ZN1S6Nested4initIdEEvT_(%"struct.S::Nested"* %d, double 0.000000e+00), !dbg !42
%D = getelementptr inbounds %"struct.S::Nested", %"struct.S::Nested"* %d, i32 0, i32 0, !dbg !43
%0 = load double, double* %D, align 8, !dbg !43
ret double %0, !dbg !44
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
; Function Attrs: nounwind ssp uwtable
define linkonce_odr void @_ZN1S6Nested4initIdEEvT_(%"struct.S::Nested"* %this, double %Val) #2 align 2 {
entry:
%this.addr = alloca %"struct.S::Nested"*, align 8
%Val.addr = alloca double, align 8
store %"struct.S::Nested"* %this, %"struct.S::Nested"** %this.addr, align 8
call void @llvm.dbg.declare(metadata %"struct.S::Nested"** %this.addr, metadata !45, metadata !40), !dbg !47
store double %Val, double* %Val.addr, align 8
call void @llvm.dbg.declare(metadata double* %Val.addr, metadata !48, metadata !40), !dbg !49
%this1 = load %"struct.S::Nested"*, %"struct.S::Nested"** %this.addr
%0 = load double, double* %Val.addr, align 8, !dbg !50
%D = getelementptr inbounds %"struct.S::Nested", %"struct.S::Nested"* %this1, i32 0, i32 0, !dbg !51
store double %0, double* %D, align 8, !dbg !52
ret void, !dbg !53
}
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" }
attributes #1 = { nounwind readnone }
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" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!35, !36, !37}
!llvm.ident = !{!38}
!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)
!1 = !DIFile(filename: "odr6.cpp", directory: "/Inputs")
!2 = !{}
!3 = !{!4, !20, !23}
!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !5, line: 1, size: 128, align: 64, elements: !6, identifier: "_ZTS1S")
!5 = !DIFile(filename: "./odr-types.h", directory: "/Inputs")
!6 = !{!7, !9, !10, !14, !17}
!7 = !DIDerivedType(tag: DW_TAG_member, name: "I", scope: !"_ZTS1S", file: !5, line: 2, baseType: !8, size: 32, align: 32)
!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!9 = !DIDerivedType(tag: DW_TAG_member, name: "D", scope: !"_ZTS1S", file: !5, line: 15, baseType: !"_ZTSN1S6NestedE", size: 64, align: 64, offset: 64)
!10 = !DISubprogram(name: "incr", linkageName: "_ZN1S4incrEv", scope: !"_ZTS1S", file: !5, line: 4, type: !11, isLocal: false, isDefinition: false, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false)
!11 = !DISubroutineType(types: !12)
!12 = !{null, !13}
!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !"_ZTS1S", size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
!14 = !DISubprogram(name: "incr", linkageName: "_ZN1S4incrEi", scope: !"_ZTS1S", file: !5, line: 5, type: !15, isLocal: false, isDefinition: false, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false)
!15 = !DISubroutineType(types: !16)
!16 = !{null, !13, !8}
!17 = !DISubprogram(name: "foo", linkageName: "_ZN1S3fooEv", scope: !"_ZTS1S", file: !5, line: 18, type: !18, isLocal: false, isDefinition: false, scopeLine: 18, flags: DIFlagPrototyped, isOptimized: false)
!18 = !DISubroutineType(types: !19)
!19 = !{!8, !13}
!20 = !DICompositeType(tag: DW_TAG_structure_type, name: "Nested", scope: !"_ZTS1S", file: !5, line: 9, size: 64, align: 64, elements: !21, identifier: "_ZTSN1S6NestedE")
!21 = !{!22}
!22 = !DIDerivedType(tag: DW_TAG_member, name: "D", scope: !"_ZTSN1S6NestedE", file: !5, line: 10, baseType: !23, size: 64, align: 64)
!23 = !DIBasicType(name: "double", size: 64, align: 64, encoding: DW_ATE_float)
!24 = !{!25, !28}
!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)
!26 = !DISubroutineType(types: !27)
!27 = !{!23}
!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)
!29 = !DISubroutineType(types: !30)
!30 = !{null, !31, !23}
!31 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !"_ZTSN1S6NestedE", size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
!32 = !{!33}
!33 = !DITemplateTypeParameter(name: "T", type: !23)
!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)
!35 = !{i32 2, !"Dwarf Version", i32 2}
!36 = !{i32 2, !"Debug Info Version", i32 3}
!37 = !{i32 1, !"PIC Level", i32 2}
!38 = !{!"clang version 3.8.0 (trunk 242534)"}
!39 = !DILocalVariable(tag: DW_TAG_auto_variable, name: "d", scope: !25, file: !1, line: 4, type: !"_ZTSN1S6NestedE")
!40 = !DIExpression()
!41 = !DILocation(line: 4, column: 12, scope: !25)
!42 = !DILocation(line: 5, column: 2, scope: !25)
!43 = !DILocation(line: 6, column: 11, scope: !25)
!44 = !DILocation(line: 6, column: 2, scope: !25)
!45 = !DILocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, scope: !28, type: !46, flags: DIFlagArtificial | DIFlagObjectPointer)
!46 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !"_ZTSN1S6NestedE", size: 64, align: 64)
!47 = !DILocation(line: 0, scope: !28)
!48 = !DILocalVariable(tag: DW_TAG_arg_variable, name: "Val", arg: 2, scope: !28, file: !5, line: 12, type: !23)
!49 = !DILocation(line: 12, column: 36, scope: !28)
!50 = !DILocation(line: 12, column: 54, scope: !28)
!51 = !DILocation(line: 12, column: 43, scope: !28)
!52 = !DILocation(line: 12, column: 45, scope: !28)
!53 = !DILocation(line: 12, column: 60, scope: !28)
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