1 files changed, 43 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/torture/pr57748-2.c b/gcc-4.9/gcc/testsuite/gcc.dg/torture/pr57748-2.c
new file mode 100644
index 000000000..4e3b4b884
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.dg/torture/pr57748-2.c
@@ -0,0 +1,43 @@
+/* PR middle-end/57748 */
+/* { dg-do run } */
+/* wrong code in expand_assignment:
+   misalignp == true, !MEM_P (to_rtx),
+   offset == 0, bitpos >= GET_MODE_PRECISION,
+   => result = NULL.  */
+
+#include <stdlib.h>
+
+extern void abort (void);
+
+typedef long long V
+  __attribute__ ((vector_size (2 * sizeof (long long)), may_alias));
+
+typedef struct S { V a; V b[0]; } P __attribute__((aligned (1)));
+
+struct __attribute__((packed)) T { char c; P s; };
+
+void __attribute__((noinline, noclone))
+check (struct T *t)
+{
+  if (t->s.b[0][0] != 3 || t->s.b[0][1] != 4)
+    abort ();
+}
+
+void __attribute__((noinline, noclone))
+foo (P *p)
+{
+  V a = { 3, 4 };
+  p->b[0] = a;
+}
+
+int
+main ()
+{
+  struct T *t = (struct T *) calloc (128, 1);
+
+  foo (&t->s);
+  check (t);
+
+  free (t);
+  return 0;
+}