Debug Info: Add a testcase for the bug introduced by r259975.

In r259975 we rauw'ed the scope of enum declarations without taking into
account that DIBuilder strips out scope references that point to the
DICompileUnit to facilitate type uniquing.

This testcase guards against making the same mistake again.
<rdar://problem/25078246>

llvm-svn: 264366

diff --git a/clang/test/CodeGenCXX/debug-info-enum-class.cpp b/clang/test/CodeGenCXX/debug-info-enum-class.cpp
index 71e6e2b..70c57d6 100644 (file)
--- a/clang/test/CodeGenCXX/debug-info-enum-class.cpp
+++ b/clang/test/CodeGenCXX/debug-info-enum-class.cpp
@@ -4,6 +4,7 @@ enum class A { A1=1 };                 // underlying type is int by default
 enum class B: unsigned long { B1=1 };  // underlying type is unsigned long
 enum C { C1 = 1 };
 enum D : short; // enum forward declaration
+enum Z : int;
 A a;
 B b;
 C c;
@@ -94,6 +95,11 @@ void f2(E) {
 // CHECK-NOT:              offset:
 // CHECK-SAME:             flags: DIFlagFwdDecl
 
+// CHECK: !DICompositeType(tag: DW_TAG_enumeration_type, name: "Z"
+// CHECK-NOT:              scope:
+// CHECK-SAME:             flags: DIFlagFwdDecl
+void fz() { Z z; }
+
 namespace test5 {
 // CHECK: !DICompositeType(tag: DW_TAG_enumeration_type, name: "E"
 // CHECK-SAME:             scope: [[TEST5:![0-9]+]]