Make sure debug info contains linkage names (DW_AT_MIPS_linkage_name)

for constructors and destructors since the original declaration given
by the AT_specification both won't and can't.

Patch by Yacine Belkadi, I've cleaned up the testcases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181471 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 120 insertions, 1 deletions

diff --git a/test/DebugInfo/X86/concrete_out_of_line.ll b/test/DebugInfo/X86/concrete_out_of_line.ll
index 3b9aefc..35b2e67 100644
--- a/test/DebugInfo/X86/concrete_out_of_line.ll
+++ b/test/DebugInfo/X86/concrete_out_of_line.ll
@@ -8,13 +8,14 @@
 ; AT_inline.
 
 ; CHECK: 0x0000011e:   DW_TAG_subprogram [18]
+; CHECK-NEXT:     DW_AT_MIPS_linkage_name
 ; CHECK-NEXT:     DW_AT_specification
 ; CHECK-NEXT:     DW_AT_inline
 
 
 ; and then that a TAG_subprogram refers to it with AT_abstract_origin.
 
-; CHECK: 0x0000015f:   DW_TAG_subprogram [20]
+; CHECK: 0x00000167:   DW_TAG_subprogram [21]
 ; CHECK-NEXT: DW_AT_abstract_origin [DW_FORM_ref4]    (cu + 0x011e => {0x0000011e})
 
 define i32 @_ZN17nsAutoRefCnt7ReleaseEv() {
diff --git a/test/DebugInfo/X86/linkage-name-ctor-dtor.ll b/test/DebugInfo/X86/linkage-name-ctor-dtor.ll
new file mode 100644
index 0000000..ce9ef8d
--- /dev/null
+++ b/test/DebugInfo/X86/linkage-name-ctor-dtor.ll
@@ -0,0 +1,118 @@
+; RUN: llc -O0 %s -o %t -filetype=obj
+; RUN: llvm-dwarfdump -debug-dump=info %t | FileCheck %s
+
+; Check that the linkage name is present for constructors/destructors.
+
+; CHECK: DW_AT_MIPS_linkage_name {{.*}}"_ZN3FooD1Ev"
+; CHECK: DW_AT_MIPS_linkage_name {{.*}}"_ZN3FooC1Ev"
+; END
+
+; $ cat test.cpp
+; class Foo {
+; public:
+;   Foo() {}
+;   ~Foo() {}
+; };
+;
+; void bar()
+; {
+;     Foo F;
+; }
+
+; $ clang++ -g -O0 -c test.cpp -S -emit-llvm -o test.ll
+; $ cat test.ll
+
+; ModuleID = 'test.cpp'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%class.Foo = type { i8 }
+
+; Function Attrs: 
+define void @_Z3barv() #0 {
+entry:
+  %F = alloca %class.Foo, align 1
+  call void @llvm.dbg.declare(metadata !{%class.Foo* %F}, metadata !21), !dbg !22
+  call void @_ZN3FooC1Ev(%class.Foo* %F), !dbg !22
+  call void @_ZN3FooD1Ev(%class.Foo* %F), !dbg !23
+  ret void, !dbg !23
+}
+
+declare void @llvm.dbg.declare(metadata, metadata) #1
+
+define linkonce_odr void @_ZN3FooC1Ev(%class.Foo* %this) unnamed_addr #0 align 2 {
+entry:
+  %this.addr = alloca %class.Foo*, align 8
+  store %class.Foo* %this, %class.Foo** %this.addr, align 8
+  call void @llvm.dbg.declare(metadata !{%class.Foo** %this.addr}, metadata !24), !dbg !26
+  %this1 = load %class.Foo** %this.addr
+  call void @_ZN3FooC2Ev(%class.Foo* %this1), !dbg !26
+  ret void, !dbg !26
+}
+
+define linkonce_odr void @_ZN3FooD1Ev(%class.Foo* %this) unnamed_addr #0 align 2 {
+entry:
+  %this.addr = alloca %class.Foo*, align 8
+  store %class.Foo* %this, %class.Foo** %this.addr, align 8
+  call void @llvm.dbg.declare(metadata !{%class.Foo** %this.addr}, metadata !27), !dbg !28
+  %this1 = load %class.Foo** %this.addr
+  call void @_ZN3FooD2Ev(%class.Foo* %this1), !dbg !28
+  ret void, !dbg !28
+}
+
+define linkonce_odr void @_ZN3FooD2Ev(%class.Foo* %this) unnamed_addr #0 align 2 {
+entry:
+  %this.addr = alloca %class.Foo*, align 8
+  store %class.Foo* %this, %class.Foo** %this.addr, align 8
+  call void @llvm.dbg.declare(metadata !{%class.Foo** %this.addr}, metadata !29), !dbg !30
+  %this1 = load %class.Foo** %this.addr
+  ret void, !dbg !30
+}
+
+define linkonce_odr void @_ZN3FooC2Ev(%class.Foo* %this) unnamed_addr #0 align 2 {
+entry:
+  %this.addr = alloca %class.Foo*, align 8
+  store %class.Foo* %this, %class.Foo** %this.addr, align 8
+  call void @llvm.dbg.declare(metadata !{%class.Foo** %this.addr}, metadata !31), !dbg !32
+  %this1 = load %class.Foo** %this.addr
+  ret void, !dbg !32
+}
+
+attributes #0 = { nounwind }
+attributes #1 = { nounwind readnone }
+
+!llvm.dbg.cu = !{!0}
+
+!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.3 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ] [/tmp/test.cpp] [DW_LANG_C_plus_plus]
+!1 = metadata !{metadata !"test.cpp", metadata !"/tmp"}
+!2 = metadata !{i32 0}
+!3 = metadata !{metadata !4, metadata !8, metadata !18, metadata !19, metadata !20}
+!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"bar", metadata !"bar", metadata !"_Z3barv", i32 7, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void ()* @_Z3barv, null, null, metadata !2, i32 8} ; [ DW_TAG_subprogram ] [line 7] [def] [scope 8] [bar]
+!5 = metadata !{i32 786473, metadata !1}          ; [ DW_TAG_file_type ] [/tmp/test.cpp]
+!6 = metadata !{i32 786453, i32 0, i32 0, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{null}
+!8 = metadata !{i32 786478, metadata !1, null, metadata !"~Foo", metadata !"~Foo", metadata !"_ZN3FooD1Ev", i32 4, metadata !9, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.Foo*)* @_ZN3FooD1Ev, null, metadata !16, metadata !2, i32 4} ; [ DW_TAG_subprogram ] [line 4] [def] [~Foo]
+!9 = metadata !{i32 786453, i32 0, i32 0, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !10, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!10 = metadata !{null, metadata !11}
+!11 = metadata !{i32 786447, i32 0, i32 0, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !12} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from Foo]
+!12 = metadata !{i32 786434, metadata !1, null, metadata !"Foo", i32 1, i64 8, i64 8, i32 0, i32 0, null, metadata !13, i32 0, null, null} ; [ DW_TAG_class_type ] [Foo] [line 1, size 8, align 8, offset 0] [from ]
+!13 = metadata !{metadata !14, metadata !16}
+!14 = metadata !{i32 786478, metadata !1, metadata !12, metadata !"Foo", metadata !"Foo", metadata !"", i32 3, metadata !9, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !15, i32 3} ; [ DW_TAG_subprogram ] [line 3] [Foo]
+!15 = metadata !{i32 786468}
+!16 = metadata !{i32 786478, metadata !1, metadata !12, metadata !"~Foo", metadata !"~Foo", metadata !"", i32 4, metadata !9, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !17, i32 4} ; [ DW_TAG_subprogram ] [line 4] [~Foo]
+!17 = metadata !{i32 786468}
+!18 = metadata !{i32 786478, metadata !1, null, metadata !"~Foo", metadata !"~Foo", metadata !"_ZN3FooD2Ev", i32 4, metadata !9, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.Foo*)* @_ZN3FooD2Ev, null, metadata !16, metadata !2, i32 4} ; [ DW_TAG_subprogram ] [line 4] [def] [~Foo]
+!19 = metadata !{i32 786478, metadata !1, null, metadata !"Foo", metadata !"Foo", metadata !"_ZN3FooC1Ev", i32 3, metadata !9, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.Foo*)* @_ZN3FooC1Ev, null, metadata !14, metadata !2, i32 3} ; [ DW_TAG_subprogram ] [line 3] [def] [Foo]
+!20 = metadata !{i32 786478, metadata !1, null, metadata !"Foo", metadata !"Foo", metadata !"_ZN3FooC2Ev", i32 3, metadata !9, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, void (%class.Foo*)* @_ZN3FooC2Ev, null, metadata !14, metadata !2, i32 3} ; [ DW_TAG_subprogram ] [line 3] [def] [Foo]
+!21 = metadata !{i32 786688, metadata !4, metadata !"F", metadata !5, i32 9, metadata !12, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [F] [line 9]
+!22 = metadata !{i32 9, i32 0, metadata !4, null}
+!23 = metadata !{i32 10, i32 0, metadata !4, null}
+!24 = metadata !{i32 786689, metadata !19, metadata !"this", metadata !5, i32 16777219, metadata !25, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this] [line 3]
+!25 = metadata !{i32 786447, null, null, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 0, metadata !12} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from Foo]
+!26 = metadata !{i32 3, i32 0, metadata !19, null}
+!27 = metadata !{i32 786689, metadata !8, metadata !"this", metadata !5, i32 16777220, metadata !25, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this] [line 4]
+!28 = metadata !{i32 4, i32 0, metadata !8, null}
+!29 = metadata !{i32 786689, metadata !18, metadata !"this", metadata !5, i32 16777220, metadata !25, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this] [line 4]
+!30 = metadata !{i32 4, i32 0, metadata !18, null}
+!31 = metadata !{i32 786689, metadata !20, metadata !"this", metadata !5, i32 16777219, metadata !25, i32 1088, i32 0} ; [ DW_TAG_arg_variable ] [this] [line 3]
+!32 = metadata !{i32 3, i32 0, metadata !20, null}