Module Debugging: Fine-tune the condition that determines whether a type
can be found in a module.

There are externally visible anonymous types that can be found:
  typedef struct { } s; // I can be found via the typedef.
There are anonymous internal types that can be found:
  namespace { struct s {}; } // I can be found by name.

rdar://problem/24199640

llvm-svn: 258272
diff --git a/clang/test/Modules/ExtDebugInfo.cpp b/clang/test/Modules/ExtDebugInfo.cpp
index 101b0f1..b9eae12 100644
--- a/clang/test/Modules/ExtDebugInfo.cpp
+++ b/clang/test/Modules/ExtDebugInfo.cpp
@@ -39,8 +39,10 @@
 TypedefEnum tde;
 TypedefStruct tds;
 
+InAnonymousNamespace anon;
+
 void foo() {
-  GlobalStruct.i = GlobalUnion.i = GlobalEnum;
+  anon.i = GlobalStruct.i = GlobalUnion.i = GlobalEnum;
 }
 
 // CHECK: ![[NS:.*]] = !DINamespace(name: "DebugCXX", scope: ![[MOD:[0-9]+]],
@@ -93,4 +95,10 @@
 // CHECK: ![[GLOBAL_STRUCT]] = !DICompositeType(tag: DW_TAG_structure_type,
 // CHECK-SAME:                elements: !{{[0-9]+}})
 
+// CHECK: !DIGlobalVariable(name: "anon",
+// CHECK-SAME:              type: ![[GLOBAL_ANON:[0-9]+]]
+// CHECK: ![[GLOBAL_ANON]] = !DICompositeType(tag: DW_TAG_structure_type,
+// CHECK-SAME:              name: "InAnonymousNamespace", {{.*}}DIFlagFwdDecl)
+
+
 // CHECK: !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !0, entity: !"_ZTSN8DebugCXX6StructE", line: 24)