1 files changed, 28 insertions, 0 deletions
diff --git a/gcc-4.8/gcc/testsuite/gcc.dg/builtin-object-size-14.c b/gcc-4.8/gcc/testsuite/gcc.dg/builtin-object-size-14.c
new file mode 100644
index 000000000..085011eda
--- /dev/null
+++ b/gcc-4.8/gcc/testsuite/gcc.dg/builtin-object-size-14.c
@@ -0,0 +1,28 @@
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+extern void abort (void);
+extern char *strncpy(char *, const char *, __SIZE_TYPE__);
+
+union u {
+    struct {
+	char vi[8];
+	char pi[16];
+    };
+    char all[8+16+4];
+};
+
+void __attribute__((noinline,noclone))
+f(union u *u)
+{
+  char vi[8+1];
+  __builtin_strncpy(vi, u->vi, sizeof(u->vi));
+  if (__builtin_object_size (u->all, 1) != -1)
+    abort ();
+}
+int main()
+{
+  union u u;
+  f (&u);
+  return 0;
+}