1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/testsuite/obj-c++.dg/strings/const-str-5.mm b/gcc/testsuite/obj-c++.dg/strings/const-str-5.mm
new file mode 100644
index 000000000..8c12a0c11
--- /dev/null
+++ b/gcc/testsuite/obj-c++.dg/strings/const-str-5.mm
@@ -0,0 +1,28 @@
+/* Positive test case for constant string layout.  */
+/* Contributed by Ziemowit Laski  <zlaski@apple.com>.  */
+
+/* { dg-do compile } */
+/* { dg-options "-fconstant-string-class=MyConstantString" } */
+/* { dg-options "-mno-constant-cfstrings -fconstant-string-class=MyConstantString" { target *-*-darwin* } } */
+
+@interface MyBase {
+  const char *p;
+}
+@end
+
+@interface MyConstantString: MyBase {
+  union equiv_u {
+    void     *u;
+    unsigned char   *c;
+  } _contents;
+  unsigned int  _count;
+}
+@end
+
+/* The NeXT runtime initializes the 'isa' pointer of string constants at
+   compile time.  */
+#ifdef __NEXT_RUNTIME__
+extern void *_MyConstantStringClassReference;
+#endif
+
+MyConstantString *str = @"Hello";