Add clang test

Author: ykhatav

clang/test/CodeGen/unused_nested_enump.cpp

@@ -0,0 +1,32 @@
+// RUN: %clang_cc1 -debug-info-kind=unused-types  -emit-llvm -o - %s | FileCheck %s
+
+struct Type {
+    enum { Unused };
+    int value = 0;
+};
+int main() {
+    Type t;
+    return t.value;
+}
+
+// CHECK: !DICompositeType(tag: DW_TAG_enumeration_type
+// CHECK-SAME: scope: ![[STRUCT:[0-9]+]]
+// CHECK-SAME: baseType: ![[UINT:[0-9]+]]
+// CHECK-SAME: elements: ![[ELEMENTS:[0-9]+]]
+
+// CHECK: ![[STRUCT]] = distinct !DICompositeType(tag: DW_TAG_structure_type
+// CHECK-SAME: elements: ![[STRUCT_ELEMENTS:[0-9]+]]
+
+// CHECK: ![[STRUCT_ELEMENTS]] = !{![[ENUM_MEMBER:[0-9]+]], ![[VALUE_MEMBER:[0-9]+]]}
+
+// CHECK: ![[VALUE_MEMBER]] = !DIDerivedType(tag: DW_TAG_member
+// CHECK-SAME: name: "value"
+// CHECK-SAME: scope: ![[STRUCT]]
+// CHECK-SAME: baseType: ![[INT:[0-9]+]]
+
+// CHECK: ![[INT]] = !DIBasicType(name: "int"
+
+// CHECK: ![[UINT]] = !DIBasicType(name: "unsigned int"
+
+// CHECK: ![[ELEMENTS]] = !{![[ENUMERATOR:[0-9]+]]}
+// CHECK: ![[ENUMERATOR]] = !DIEnumerator(name: "Unused", value: 0, isUnsigned: true)