[llvm] r199536 - Debug info (LTO): Move the creation of accessibility flags to
David Blaikie
dblaikie at gmail.com
Wed Aug 27 15:44:15 PDT 2014
On Fri, Jan 17, 2014 at 6:12 PM, Adrian Prantl <aprantl at apple.com> wrote:
> Author: adrian
> Date: Fri Jan 17 20:12:00 2014
> New Revision: 199536
>
> URL: http://llvm.org/viewvc/llvm-project?rev=199536&view=rev
> Log:
> Debug info (LTO): Move the creation of accessibility flags to
> getOrCreateSubprogramDIE to avoid attributes being added twice when DIEs
> are merged.
>
I believe this change may've caused DW_AT_accessibility to be emitted for
all subprogram DIEs, not just member subprogram DIEs (ie: even for free
functions).
Honestly, probably the right fix is to add another flag (FlagPublic) and
then just emit DW_AT_accessibility if one of the three flags is set. This
would allow the frontend to omit the flag even for members, if their
accessibility is the default (eg: public members in structs, private
members in classes) - it's something I've seen GCC do that Clang doesn't
(could be a very minor DWARF size reduction benefit).
(I came across this while trying to improve -gmlt, in which case I'd like
to not emit accessibility at all, even for member functions)
- David
>
> rdar://problem/15842330.
>
> Added:
> llvm/trunk/test/Linker/type-unique-simple2-a.ll
> llvm/trunk/test/Linker/type-unique-simple2-b.ll
> Modified:
> llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
>
> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.cpp?rev=199536&r1=199535&r2=199536&view=diff
>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.cpp (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfUnit.cpp Fri Jan 17 20:12:00
> 2014
> @@ -1191,21 +1191,9 @@ void DwarfUnit::constructTypeDIE(DIE &Bu
> for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
> DIDescriptor Element = Elements.getElement(i);
> DIE *ElemDie = NULL;
> - if (Element.isSubprogram()) {
> - DISubprogram SP(Element);
> - ElemDie = getOrCreateSubprogramDIE(SP);
> - if (SP.isProtected())
> - addUInt(ElemDie, dwarf::DW_AT_accessibility,
> dwarf::DW_FORM_data1,
> - dwarf::DW_ACCESS_protected);
> - else if (SP.isPrivate())
> - addUInt(ElemDie, dwarf::DW_AT_accessibility,
> dwarf::DW_FORM_data1,
> - dwarf::DW_ACCESS_private);
> - else
> - addUInt(ElemDie, dwarf::DW_AT_accessibility,
> dwarf::DW_FORM_data1,
> - dwarf::DW_ACCESS_public);
> - if (SP.isExplicit())
> - addFlag(ElemDie, dwarf::DW_AT_explicit);
> - } else if (Element.isDerivedType()) {
> + if (Element.isSubprogram())
> + ElemDie = getOrCreateSubprogramDIE(DISubprogram(Element));
> + else if (Element.isDerivedType()) {
> DIDerivedType DDTy(Element);
> if (DDTy.getTag() == dwarf::DW_TAG_friend) {
> ElemDie = createAndAddDIE(dwarf::DW_TAG_friend, Buffer);
> @@ -1490,6 +1478,19 @@ DIE *DwarfUnit::getOrCreateSubprogramDIE
> if (SP.isRValueReference())
> addFlag(SPDie, dwarf::DW_AT_rvalue_reference);
>
> + if (SP.isProtected())
> + addUInt(SPDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
> + dwarf::DW_ACCESS_protected);
> + else if (SP.isPrivate())
> + addUInt(SPDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
> + dwarf::DW_ACCESS_private);
> + else
> + addUInt(SPDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
> + dwarf::DW_ACCESS_public);
> +
> + if (SP.isExplicit())
> + addFlag(SPDie, dwarf::DW_AT_explicit);
> +
> return SPDie;
> }
>
>
> Added: llvm/trunk/test/Linker/type-unique-simple2-a.ll
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Linker/type-unique-simple2-a.ll?rev=199536&view=auto
>
> ==============================================================================
> --- llvm/trunk/test/Linker/type-unique-simple2-a.ll (added)
> +++ llvm/trunk/test/Linker/type-unique-simple2-a.ll Fri Jan 17 20:12:00
> 2014
> @@ -0,0 +1,129 @@
> +; REQUIRES: object-emission
> +;
> +; RUN: llvm-link %s %p/type-unique-simple2-b.ll -S -o - | llc
> -filetype=obj -O0 | llvm-dwarfdump -debug-dump=info - | FileCheck %s
> +;
> +; Tests for a merge error where attributes are inserted twice into the
> same DIE.
> +;
> +; $ cat ab.h
> +; typedef int foo_t;
> +; class A {
> +; public:
> +; virtual void setFoo();
> +; virtual const foo_t getFoo();
> +; };
> +;
> +; $ cat a.cpp
> +; #include "ab.h"
> +; foo_t bar() {
> +; return A().getFoo();
> +; }
> +;
> +; CHECK: _ZN1A6setFooEv
> +; CHECK: DW_AT_accessibility [DW_FORM_data1] (0x01)
> +; CHECK-NOT: DW_AT_accessibility
> +; CHECK: DW_TAG
> +
> +; ModuleID = 'a.cpp'
> +
> +%class.A = type { i32 (...)** }
> +
> + at _ZTV1A = external unnamed_addr constant [4 x i8*]
> +
> +; Function Attrs: nounwind
> +define i32 @_Z3barv() #0 {
> +entry:
> + %tmp = alloca %class.A, align 8
> + %0 = bitcast %class.A* %tmp to i8*, !dbg !38
> + call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 8, i32 8, i1 false),
> !dbg !38
> + call void @_ZN1AC1Ev(%class.A* %tmp) #1, !dbg !38
> + %call = call i32 @_ZN1A6getFooEv(%class.A* %tmp), !dbg !38
> + ret i32 %call, !dbg !38
> +}
> +
> +; Function Attrs: nounwind
> +declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) #1
> +
> +; Function Attrs: inlinehint nounwind
> +define linkonce_odr void @_ZN1AC1Ev(%class.A* %this) unnamed_addr #2
> align 2 {
> +entry:
> + %this.addr = alloca %class.A*, align 8
> + store %class.A* %this, %class.A** %this.addr, align 8
> + call void @llvm.dbg.declare(metadata !{%class.A** %this.addr}, metadata
> !39), !dbg !41
> + %this1 = load %class.A** %this.addr
> + call void @_ZN1AC2Ev(%class.A* %this1) #1, !dbg !42
> + ret void, !dbg !42
> +}
> +
> +declare i32 @_ZN1A6getFooEv(%class.A*)
> +
> +; Function Attrs: nounwind readnone
> +declare void @llvm.dbg.declare(metadata, metadata) #4
> +
> +; Function Attrs: inlinehint nounwind
> +define linkonce_odr void @_ZN1AC2Ev(%class.A* %this) unnamed_addr #2
> align 2 {
> +entry:
> + %this.addr = alloca %class.A*, align 8
> + store %class.A* %this, %class.A** %this.addr, align 8
> + call void @llvm.dbg.declare(metadata !{%class.A** %this.addr}, metadata
> !44), !dbg !45
> + %this1 = load %class.A** %this.addr
> + %0 = bitcast %class.A* %this1 to i8***, !dbg !46
> + store i8** getelementptr inbounds ([4 x i8*]* @_ZTV1A, i64 0, i64 2),
> i8*** %0, !dbg !46
> + ret void, !dbg !46
> +}
> +
> +attributes #0 = { nounwind }
> +attributes #1 = { nounwind }
> +attributes #2 = { inlinehint nounwind }
> +attributes #4 = { nounwind readnone }
> +
> +!llvm.dbg.cu = !{!0}
> +!llvm.module.flags = !{!35, !36}
> +!llvm.ident = !{!37}
> +
> +!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version
> 3.5 ", i1 false, metadata !"", i32 0, metadata !2, metadata !3, metadata
> !26, metadata !2, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ]
> [/<unknown>] [DW_LANG_C_plus_plus]
> +!1 = metadata !{metadata !"<unknown>", metadata !""}
> +!2 = metadata !{i32 0}
> +!3 = metadata !{metadata !4}
> +!4 = metadata !{i32 786434, metadata !5, null, metadata !"A", i32 2, i64
> 64, i64 64, i32 0, i32 0, null, metadata !6, i32 0, metadata !"_ZTS1A",
> null, metadata !"_ZTS1A"} ; [ DW_TAG_class_type ] [A] [line 2, size 64,
> align 64, offset 0] [def] [from ]
> +!5 = metadata !{metadata !"./ab.h", metadata !""}
> +!6 = metadata !{metadata !7, metadata !14, metadata !19}
> +!7 = metadata !{i32 786445, metadata !5, metadata !8, metadata
> !"_vptr$A", i32 0, i64 64, i64 0, i64 0, i32 64, metadata !9} ; [
> DW_TAG_member ] [_vptr$A] [line 0, size 64, align 0, offset 0] [artificial]
> [from ]
> +!8 = metadata !{i32 786473, metadata !5} ; [ DW_TAG_file_type ]
> [/./ab.h]
> +!9 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64
> 0, i64 0, i32 0, metadata !10} ; [ DW_TAG_pointer_type ] [line 0, size 64,
> align 0, offset 0] [from __vtbl_ptr_type]
> +!10 = metadata !{i32 786447, null, null, metadata !"__vtbl_ptr_type", i32
> 0, i64 64, i64 0, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
> [__vtbl_ptr_type] [line 0, size 64, align 0, offset 0] [from ]
> +!11 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64
> 0, i64 0, i32 0, null, metadata !12, i32 0, null, null, null} ; [
> DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
> +!12 = metadata !{metadata !13}
> +!13 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32,
> i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32,
> align 32, offset 0, enc DW_ATE_signed]
> +!14 = metadata !{i32 786478, metadata !5, metadata !"_ZTS1A", metadata
> !"setFoo", metadata !"setFoo", metadata !"_ZN1A6setFooEv", i32 4, metadata
> !15, i1 false, i1 false, i32 1, i32 0, metadata !"_ZTS1A", i32 256, i1
> false, null, null, i32 0, metadata !18, i32 4} ; [ DW_TAG_subprogram ]
> [line 4] [setFoo]
> +!15 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64
> 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [
> DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
> +!16 = metadata !{null, metadata !17}
> +!17 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64
> 64, i64 0, i32 1088, metadata !"_ZTS1A"} ; [ DW_TAG_pointer_type ] [line 0,
> size 64, align 64, offset 0] [artificial] [from _ZTS1A]
> +!18 = metadata !{i32 786468}
> +!19 = metadata !{i32 786478, metadata !5, metadata !"_ZTS1A", metadata
> !"getFoo", metadata !"getFoo", metadata !"_ZN1A6getFooEv", i32 5, metadata
> !20, i1 false, i1 false, i32 1, i32 1, metadata !"_ZTS1A", i32 256, i1
> false, null, null, i32 0, metadata !25, i32 5} ; [ DW_TAG_subprogram ]
> [line 5] [getFoo]
> +!20 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64
> 0, i64 0, i32 0, null, metadata !21, i32 0, null, null, null} ; [
> DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
> +!21 = metadata !{metadata !22, metadata !17}
> +!22 = metadata !{i32 786470, null, null, metadata !"", i32 0, i64 0, i64
> 0, i64 0, i32 0, metadata !23} ; [ DW_TAG_const_type ] [line 0, size 0,
> align 0, offset 0] [from foo_t]
> +!23 = metadata !{i32 786454, metadata !24, null, metadata !"foo_t", i32
> 1, i64 0, i64 0, i64 0, i32 0, metadata !13} ; [ DW_TAG_typedef ] [foo_t]
> [line 1, size 0, align 0, offset 0] [from int]
> +!24 = metadata !{metadata !"a.cpp", metadata !""}
> +!25 = metadata !{i32 786468}
> +!26 = metadata !{metadata !27, metadata !31, metadata !34}
> +!27 = metadata !{i32 786478, metadata !24, metadata !28, metadata !"bar",
> metadata !"bar", metadata !"_Z3barv", i32 2, metadata !29, i1 false, i1
> true, i32 0, i32 0, null, i32 256, i1 false, i32 ()* @_Z3barv, null, null,
> metadata !2, i32 2} ; [ DW_TAG_subprogram ] [line 2] [def] [bar]
> +!28 = metadata !{i32 786473, metadata !24} ; [ DW_TAG_file_type ]
> [/a.cpp]
> +!29 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64
> 0, i64 0, i32 0, null, metadata !30, i32 0, null, null, null} ; [
> DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
> +!30 = metadata !{metadata !23}
> +!31 = metadata !{i32 786478, metadata !5, metadata !"_ZTS1A", metadata
> !"A", metadata !"A", metadata !"_ZN1AC1Ev", i32 2, metadata !15, i1 false,
> i1 true, i32 0, i32 0, null, i32 320, i1 false, void (%class.A*)*
> @_ZN1AC1Ev, null, metadata !32, metadata !2, i32 2} ; [ DW_TAG_subprogram ]
> [line 2] [def] [A]
> +!32 = metadata !{i32 786478, null, metadata !"_ZTS1A", metadata !"A",
> metadata !"A", metadata !"", i32 0, metadata !15, i1 false, i1 false, i32
> 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !33, i32 0}
> ; [ DW_TAG_subprogram ] [line 0] [A]
> +!33 = metadata !{i32 786468}
> +!34 = metadata !{i32 786478, metadata !5, metadata !"_ZTS1A", metadata
> !"A", metadata !"A", metadata !"_ZN1AC2Ev", i32 2, metadata !15, i1 false,
> i1 true, i32 0, i32 0, null, i32 320, i1 false, void (%class.A*)*
> @_ZN1AC2Ev, null, metadata !32, metadata !2, i32 2} ; [ DW_TAG_subprogram ]
> [line 2] [def] [A]
> +!35 = metadata !{i32 2, metadata !"Dwarf Version", i32 2}
> +!36 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
> +!37 = metadata !{metadata !"clang version 3.5 "}
> +!38 = metadata !{i32 3, i32 0, metadata !27, null}
> +!39 = metadata !{i32 786689, metadata !31, metadata !"this", null, i32
> 16777216, metadata !40, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this]
> [line 0]
> +!40 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64
> 64, i64 0, i32 0, metadata !"_ZTS1A"} ; [ DW_TAG_pointer_type ] [line 0,
> size 64, align 64, offset 0] [from _ZTS1A]
> +!41 = metadata !{i32 0, i32 0, metadata !31, null}
> +!42 = metadata !{i32 2, i32 0, metadata !43, null}
> +!43 = metadata !{i32 786443, metadata !5, metadata !31} ; [
> DW_TAG_lexical_block ] [/./ab.h]
> +!44 = metadata !{i32 786689, metadata !34, metadata !"this", null, i32
> 16777216, metadata !40, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this]
> [line 0]
> +!45 = metadata !{i32 0, i32 0, metadata !34, null}
> +!46 = metadata !{i32 2, i32 0, metadata !34, null}
>
> Added: llvm/trunk/test/Linker/type-unique-simple2-b.ll
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Linker/type-unique-simple2-b.ll?rev=199536&view=auto
>
> ==============================================================================
> --- llvm/trunk/test/Linker/type-unique-simple2-b.ll (added)
> +++ llvm/trunk/test/Linker/type-unique-simple2-b.ll Fri Jan 17 20:12:00
> 2014
> @@ -0,0 +1,88 @@
> +; RUN: true
> +; This file belongs to type-unique-simple2-a.ll.
> +;
> +; $ cat b.cpp
> +; #include "ab.h"
> +; void A::setFoo() {}
> +; const
> +; foo_t A::getFoo() { return 1; }
> +; ModuleID = 'b.cpp'
> +; target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
> +; target triple = "x86_64-apple-macosx10.9.0"
> +
> +%class.A = type { i32 (...)** }
> +
> + at _ZTV1A = unnamed_addr constant [4 x i8*] [i8* null, i8* bitcast ({ i8*,
> i8* }* @_ZTI1A to i8*), i8* bitcast (void (%class.A*)* @_ZN1A6setFooEv to
> i8*), i8* bitcast (i32 (%class.A*)* @_ZN1A6getFooEv to i8*)]
> + at _ZTVN10__cxxabiv117__class_type_infoE = external global i8*
> + at _ZTS1A = constant [3 x i8] c"1A\00"
> + at _ZTI1A = unnamed_addr constant { i8*, i8* } { i8* bitcast (i8**
> getelementptr inbounds (i8** @_ZTVN10__cxxabiv117__class_type_infoE, i64 2)
> to i8*), i8* getelementptr inbounds ([3 x i8]* @_ZTS1A, i32 0, i32 0) }
> +
> +; Function Attrs: nounwind
> +define void @_ZN1A6setFooEv(%class.A* %this) unnamed_addr #0 align 2 {
> +entry:
> + %this.addr = alloca %class.A*, align 8
> + store %class.A* %this, %class.A** %this.addr, align 8
> + call void @llvm.dbg.declare(metadata !{%class.A** %this.addr}, metadata
> !32), !dbg !34
> + %this1 = load %class.A** %this.addr
> + ret void, !dbg !35
> +}
> +
> +; Function Attrs: nounwind readnone
> +declare void @llvm.dbg.declare(metadata, metadata) #1
> +
> +; Function Attrs: nounwind
> +define i32 @_ZN1A6getFooEv(%class.A* %this) unnamed_addr #0 align 2 {
> +entry:
> + %this.addr = alloca %class.A*, align 8
> + store %class.A* %this, %class.A** %this.addr, align 8
> + call void @llvm.dbg.declare(metadata !{%class.A** %this.addr}, metadata
> !36), !dbg !37
> + %this1 = load %class.A** %this.addr
> + ret i32 1, !dbg !38
> +}
> +
> +attributes #0 = { nounwind }
> +attributes #1 = { nounwind readnone }
> +
> +!llvm.dbg.cu = !{!0}
> +!llvm.module.flags = !{!29, !30}
> +!llvm.ident = !{!31}
> +
> +!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version
> 3.5 ", i1 false, metadata !"", i32 0, metadata !2, metadata !3, metadata
> !25, metadata !2, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ]
> [/<unknown>] [DW_LANG_C_plus_plus]
> +!1 = metadata !{metadata !"<unknown>", metadata !""}
> +!2 = metadata !{i32 0}
> +!3 = metadata !{metadata !4}
> +!4 = metadata !{i32 786434, metadata !5, null, metadata !"A", i32 2, i64
> 64, i64 64, i32 0, i32 0, null, metadata !6, i32 0, metadata !"_ZTS1A",
> null, metadata !"_ZTS1A"} ; [ DW_TAG_class_type ] [A] [line 2, size 64,
> align 64, offset 0] [def] [from ]
> +!5 = metadata !{metadata !"./ab.h", metadata !""}
> +!6 = metadata !{metadata !7, metadata !14, metadata !19}
> +!7 = metadata !{i32 786445, metadata !5, metadata !8, metadata
> !"_vptr$A", i32 0, i64 64, i64 0, i64 0, i32 64, metadata !9} ; [
> DW_TAG_member ] [_vptr$A] [line 0, size 64, align 0, offset 0] [artificial]
> [from ]
> +!8 = metadata !{i32 786473, metadata !5} ; [ DW_TAG_file_type ]
> [/./ab.h]
> +!9 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64
> 0, i64 0, i32 0, metadata !10} ; [ DW_TAG_pointer_type ] [line 0, size 64,
> align 0, offset 0] [from __vtbl_ptr_type]
> +!10 = metadata !{i32 786447, null, null, metadata !"__vtbl_ptr_type", i32
> 0, i64 64, i64 0, i64 0, i32 0, metadata !11} ; [ DW_TAG_pointer_type ]
> [__vtbl_ptr_type] [line 0, size 64, align 0, offset 0] [from ]
> +!11 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64
> 0, i64 0, i32 0, null, metadata !12, i32 0, null, null, null} ; [
> DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
> +!12 = metadata !{metadata !13}
> +!13 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32,
> i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32,
> align 32, offset 0, enc DW_ATE_signed]
> +!14 = metadata !{i32 786478, metadata !5, metadata !"_ZTS1A", metadata
> !"setFoo", metadata !"setFoo", metadata !"_ZN1A6setFooEv", i32 4, metadata
> !15, i1 false, i1 false, i32 1, i32 0, metadata !"_ZTS1A", i32 256, i1
> false, null, null, i32 0, metadata !18, i32 4} ; [ DW_TAG_subprogram ]
> [line 4] [setFoo]
> +!15 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64
> 0, i64 0, i32 0, null, metadata !16, i32 0, null, null, null} ; [
> DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
> +!16 = metadata !{null, metadata !17}
> +!17 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64
> 64, i64 0, i32 1088, metadata !"_ZTS1A"} ; [ DW_TAG_pointer_type ] [line 0,
> size 64, align 64, offset 0] [artificial] [from _ZTS1A]
> +!18 = metadata !{i32 786468}
> +!19 = metadata !{i32 786478, metadata !5, metadata !"_ZTS1A", metadata
> !"getFoo", metadata !"getFoo", metadata !"_ZN1A6getFooEv", i32 5, metadata
> !20, i1 false, i1 false, i32 1, i32 1, metadata !"_ZTS1A", i32 256, i1
> false, null, null, i32 0, metadata !24, i32 5} ; [ DW_TAG_subprogram ]
> [line 5] [getFoo]
> +!20 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64
> 0, i64 0, i32 0, null, metadata !21, i32 0, null, null, null} ; [
> DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
> +!21 = metadata !{metadata !22, metadata !17}
> +!22 = metadata !{i32 786470, null, null, metadata !"", i32 0, i64 0, i64
> 0, i64 0, i32 0, metadata !23} ; [ DW_TAG_const_type ] [line 0, size 0,
> align 0, offset 0] [from foo_t]
> +!23 = metadata !{i32 786454, metadata !5, null, metadata !"foo_t", i32 1,
> i64 0, i64 0, i64 0, i32 0, metadata !13} ; [ DW_TAG_typedef ] [foo_t]
> [line 1, size 0, align 0, offset 0] [from int]
> +!24 = metadata !{i32 786468}
> +!25 = metadata !{metadata !26, metadata !28}
> +!26 = metadata !{i32 786478, metadata !27, metadata !"_ZTS1A", metadata
> !"setFoo", metadata !"setFoo", metadata !"_ZN1A6setFooEv", i32 2, metadata
> !15, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void
> (%class.A*)* @_ZN1A6setFooEv, null, metadata !14, metadata !2, i32 2} ; [
> DW_TAG_subprogram ] [line 2] [def] [setFoo]
> +!27 = metadata !{metadata !"b.cpp", metadata !""}
> +!28 = metadata !{i32 786478, metadata !27, metadata !"_ZTS1A", metadata
> !"getFoo", metadata !"getFoo", metadata !"_ZN1A6getFooEv", i32 4, metadata
> !20, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32
> (%class.A*)* @_ZN1A6getFooEv, null, metadata !19, metadata !2, i32 4} ; [
> DW_TAG_subprogram ] [line 4] [def] [getFoo]
> +!29 = metadata !{i32 2, metadata !"Dwarf Version", i32 2}
> +!30 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
> +!31 = metadata !{metadata !"clang version 3.5 "}
> +!32 = metadata !{i32 786689, metadata !26, metadata !"this", null, i32
> 16777216, metadata !33, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this]
> [line 0]
> +!33 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64
> 64, i64 0, i32 0, metadata !"_ZTS1A"} ; [ DW_TAG_pointer_type ] [line 0,
> size 64, align 64, offset 0] [from _ZTS1A]
> +!34 = metadata !{i32 0, i32 0, metadata !26, null}
> +!35 = metadata !{i32 2, i32 0, metadata !26, null}
> +!36 = metadata !{i32 786689, metadata !28, metadata !"this", null, i32
> 16777216, metadata !33, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this]
> [line 0]
> +!37 = metadata !{i32 0, i32 0, metadata !28, null}
> +!38 = metadata !{i32 4, i32 0, metadata !28, null}
>
>
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