PR14759: Debug info support for C++ member pointers.

This works fine with GDB for member variable pointers, but GDB's support for
member function pointers seems to be quite unrelated to
DW_TAG_ptr_to_member_type. (see GDB bug 14998 for details)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171698 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 34 insertions, 0 deletions

diff --git a/test/DebugInfo/member-pointers.ll b/test/DebugInfo/member-pointers.ll
new file mode 100644
index 0000000000..0b1f18da01
--- /dev/null
+++ b/test/DebugInfo/member-pointers.ll
@@ -0,0 +1,34 @@
+; RUN: llc -filetype=obj -O0 < %s > %t
+; RUN: llvm-dwarfdump %t | FileCheck %s
+; CHECK: DW_TAG_ptr_to_member_type
+; CHECK: DW_TAG_ptr_to_member_type
+; IR generated from clang -g with the following source:
+; struct S {
+; };
+;
+; int S::*x = 0;
+; void (S::*y)(int) = 0;
+
+; ModuleID = 'simple.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"
+
+@x = global i64 -1, align 8
+@y = global { i64, i64 } zeroinitializer, align 8
+
+!llvm.dbg.cu = !{!0}
+
+!0 = metadata !{i32 786449, i32 0, i32 4, metadata !"simple.cpp", metadata !"/home/blaikie/Development/scratch", metadata !"clang version 3.3 ", i1 true, i1 false, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3} ; [ DW_TAG_compile_unit ] [/home/blaikie/Development/scratch/simple.cpp] [DW_LANG_C_plus_plus]
+!1 = metadata !{metadata !2}
+!2 = metadata !{i32 0}
+!3 = metadata !{metadata !4}
+!4 = metadata !{metadata !5, metadata !10}
+!5 = metadata !{i32 786484, i32 0, null, metadata !"x", metadata !"x", metadata !"", metadata !6, i32 2, metadata !7, i32 0, i32 1, i64* @x} ; [ DW_TAG_variable ] [x] [line 2] [def]
+!6 = metadata !{i32 786473, metadata !"simple.cpp", metadata !"/home/blaikie/Development/scratch", null} ; [ DW_TAG_file_type ]
+!7 = metadata !{i32 786463, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !8, metadata !9} ; [ DW_TAG_ptr_to_member_type ] [line 0, size 0, align 0, offset 0] [from int]
+!8 = metadata !{i32 786468, null, metadata !"int", null, 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]
+!9 = metadata !{i32 786451, null, metadata !"S", metadata !6, i32 1, i64 8, i64 8, i32 0, i32 0, null, metadata !2, i32 0, null, null} ; [ DW_TAG_structure_type ] [S] [line 1, size 8, align 8, offset 0] [from ]
+!10 = metadata !{i32 786484, i32 0, null, metadata !"y", metadata !"y", metadata !"", metadata !6, i32 3, metadata !11, i32 0, i32 1, { i64, i64 }* @y} ; [ DW_TAG_variable ] [y] [line 3] [def]
+!11 = metadata !{i32 786463, null, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !12, metadata !9} ; [ DW_TAG_ptr_to_member_type ] [line 0, size 0, align 0, offset 0] [from ]
+!12 = metadata !{i32 786453, i32 0, metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !13, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!13 = metadata !{null, metadata !8}