[committed] Add PR71280 testcase

[Jakub Jelinek]

Hi!

I came up with a simple C testcase for a PR, which apparently Martin
fixed yesterday in PR71239.

Thus, I've just committed following testcase as obvious and will close the
PR.

2016-05-26  Jakub Jelinek  <ja...@redhat.com>

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

--- gcc/testsuite/gcc.dg/pr71280.c.jj   2016-05-26 11:27:20.865844253 +0200
+++ gcc/testsuite/gcc.dg/pr71280.c      2016-05-26 11:26:52.000000000 +0200
@@ -0,0 +1,15 @@
+/* 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;
+}

        Jakub