[PATCH] Testcase for PR79409

[Richard Biener]

Tested on x86_64-unknown-linux-gnu, applied.

Richard.

2017-02-08  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/71824
        PR tree-optimization/79409
        * gcc.dg/graphite/pr71824-3.c: New testcase.

Index: gcc/testsuite/gcc.dg/graphite/pr71824-3.c
===================================================================
--- gcc/testsuite/gcc.dg/graphite/pr71824-3.c   (nonexistent)
+++ gcc/testsuite/gcc.dg/graphite/pr71824-3.c   (working copy)
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-loop-distribution -floop-nest-optimize" } */
+
+struct
+{
+  int bz;
+} od, ka[2];
+
+int fw;
+
+void
+pc (void)
+{
+  for (od.bz = 0; od.bz < 2; ++od.bz)
+    {
+      ++fw;
+      ka[0] = ka[1];
+    }
+}