DebugInfo: Emit definitions for types with no members.

The absence of members was a poor/incorrect proxy for "is definition".

llvm-svn: 187607

1 files changed, 33 insertions, 15 deletions

diff --git a/llvm/test/DebugInfo/X86/template.ll b/llvm/test/DebugInfo/X86/template.ll
index a5d732a6e3b..f80dd5c66a1 100644
--- a/llvm/test/DebugInfo/X86/template.ll
+++ b/llvm/test/DebugInfo/X86/template.ll
@@ -5,12 +5,18 @@
 
 ; IR generated with `clang++ -g -emit-llvm -S` from the following code:
 ; template<int x, int*, template<typename> class y, int ...z>  int func() { return 3; }
-; template<typename> struct y_impl {};
+; template<typename> struct y_impl { struct nested { }; };
 ; int glbl = func<3, &glbl, y_impl, 1, 2>();
+; y_impl<int>::nested n;
 
 ; CHECK: [[INT:0x[0-9a-f]*]]:{{ *}}DW_TAG_base_type
 ; CHECK-NEXT: DW_AT_name{{.*}} = "int"
 
+; CHECK: DW_TAG_structure_type
+; CHECK-NEXT: DW_AT_name{{.*}}"y_impl<int>"
+; CHECK-NOT: NULL
+; CHECK: DW_TAG_template_type_parameter
+
 ; CHECK: DW_AT_name{{.*}}"func<3, &glbl, y_impl, 1, 2>"
 ; CHECK-NOT: NULL
 ; CHECK: DW_TAG_template_value_parameter
@@ -50,34 +56,35 @@
 ; CHECK: [[INTPTR]]:{{ *}}DW_TAG_pointer_type
 ; CHECK-NEXT: DW_AT_type{{.*}} => {[[INT]]}
 
-; 
+%"struct.y_impl<int>::nested" = type { i8 }
 
 @glbl = global i32 0, align 4
+@n = global %"struct.y_impl<int>::nested" zeroinitializer, align 1
 @llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 65535, void ()* @_GLOBAL__I_a }]
 
 define internal void @__cxx_global_var_init() section ".text.startup" {
 entry:
-  %call = call i32 @_Z4funcILi3EXadL_Z4glblEE6y_implJLi1ELi2EEEiv(), !dbg !26
-  store i32 %call, i32* @glbl, align 4, !dbg !26
-  ret void, !dbg !26
+  %call = call i32 @_Z4funcILi3EXadL_Z4glblEE6y_implJLi1ELi2EEEiv(), !dbg !37
+  store i32 %call, i32* @glbl, align 4, !dbg !37
+  ret void, !dbg !37
 }
 
 ; Function Attrs: nounwind uwtable
 define linkonce_odr i32 @_Z4funcILi3EXadL_Z4glblEE6y_implJLi1ELi2EEEiv() #0 {
 entry:
-  ret i32 3, !dbg !27
+  ret i32 3, !dbg !38
 }
 
 define internal void @_GLOBAL__I_a() section ".text.startup" {
 entry:
-  call void @__cxx_global_var_init(), !dbg !28
-  ret void, !dbg !28
+  call void @__cxx_global_var_init(), !dbg !39
+  ret void, !dbg !39
 }
 
-attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
 
 !llvm.dbg.cu = !{!0}
-!llvm.module.flags = !{!25}
+!llvm.module.flags = !{!36}
 
 !0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.4 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !23, metadata !2, metadata !""} ; [ DW_TAG_compile_unit ] [/tmp/templ.cpp] [DW_LANG_C_plus_plus]
 !1 = metadata !{metadata !"templ.cpp", metadata !"/tmp"}
@@ -102,9 +109,20 @@ attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointe
 !20 = metadata !{i32 786480, null, metadata !"", metadata !11, i32 2, null, i32 0, i32 0} ; [ DW_TAG_template_value_parameter ]
 !21 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"_GLOBAL__I_a", metadata !"_GLOBAL__I_a", metadata !"", i32 1, metadata !22, i1 true, i1 true, i32 0, i32 0, null, i32 64, i1 false, void ()* @_GLOBAL__I_a, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [local] [def] [_GLOBAL__I_a]
 !22 = metadata !{i32 786453, i32 0, i32 0, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !2, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
-!23 = metadata !{metadata !24}
+!23 = metadata !{metadata !24, metadata !25}
 !24 = metadata !{i32 786484, i32 0, null, metadata !"glbl", metadata !"glbl", metadata !"", metadata !5, i32 3, metadata !11, i32 0, i32 1, i32* @glbl, null} ; [ DW_TAG_variable ] [glbl] [line 3] [def]
-!25 = metadata !{i32 2, metadata !"Dwarf Version", i32 3}
-!26 = metadata !{i32 3, i32 0, metadata !4, null}
-!27 = metadata !{i32 1, i32 0, metadata !8, null}
-!28 = metadata !{i32 1, i32 0, metadata !21, null}
+!25 = metadata !{i32 786484, i32 0, null, metadata !"n", metadata !"n", metadata !"", metadata !5, i32 4, metadata !26, i32 0, i32 1, %"struct.y_impl<int>::nested"* @n, null} ; [ DW_TAG_variable ] [n] [line 4] [def]
+!26 = metadata !{i32 786451, metadata !1, metadata !27, metadata !"nested", i32 2, i64 8, i64 8, i32 0, i32 0, null, metadata !30, i32 0, null, null} ; [ DW_TAG_structure_type ] [nested] [line 2, size 8, align 8, offset 0] [def] [from ]
+!27 = metadata !{i32 786451, metadata !1, null, metadata !"y_impl<int>", i32 2, i64 8, i64 8, i32 0, i32 0, null, null, i32 0, null, metadata !28} ; [ DW_TAG_structure_type ] [y_impl<int>] [line 2, size 8, align 8, offset 0] [def] [from ]
+!28 = metadata !{metadata !29}
+!29 = metadata !{i32 786479, null, metadata !"", metadata !11, null, i32 0, i32 0} ; [ DW_TAG_template_type_parameter ]
+!30 = metadata !{metadata !31}
+!31 = metadata !{i32 786478, metadata !1, metadata !26, metadata !"nested", metadata !"nested", metadata !"", i32 2, metadata !32, i1 false, i1 false, i32 0, i32 0, null, i32 320, i1 false, null, null, i32 0, metadata !35, i32 2} ; [ DW_TAG_subprogram ] [line 2] [nested]
+!32 = metadata !{i32 786453, i32 0, i32 0, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !33, i32 0, i32 0} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!33 = metadata !{null, metadata !34}
+!34 = metadata !{i32 786447, i32 0, i32 0, metadata !"", i32 0, i64 64, i64 64, i64 0, i32 1088, metadata !26} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [artificial] [from nested]
+!35 = metadata !{i32 786468}
+!36 = metadata !{i32 2, metadata !"Dwarf Version", i32 3}
+!37 = metadata !{i32 3, i32 0, metadata !4, null}
+!38 = metadata !{i32 1, i32 0, metadata !8, null}
+!39 = metadata !{i32 1, i32 0, metadata !21, null}