re PR tree-optimization/71280 (ICE on gcc trunk on knl, wsm, ivb and bdw targets)

	PR tree-optimization/71280
	* gcc.dg/pr71280.c: New test.

From-SVN: r236767

gcc/testsuite/ChangeLog

 2016-05-26  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/71280
+	* gcc.dg/pr71280.c: New test.
+
 	* gcc.target/i386/avx512vl-vcvtps2ph-3.c: New test.
 
 	* gcc.target/i386/avx512bw-vpalignr-4.c: New test.

gcc/testsuite/gcc.dg/pr71280.c

+/* PR tree-optimization/71280 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+extern char v[];
+
+int
+foo ()
+{
+  int k = 0;
+  typedef char T[64];
+  for (int i = 0; i < 64; i++)
+    k += (*(T *) &v[0])[i];
+  return k;
+}