[PATCH] Add testcase for PR77362

[Richard Biener]

Which no longer fails.

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

Richard.

2017-09-20  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/77362
        * gcc.dg/graphite/pr77362.c: New testcase.

Index: gcc/testsuite/gcc.dg/graphite/pr77362.c
===================================================================
--- gcc/testsuite/gcc.dg/graphite/pr77362.c     (nonexistent)
+++ gcc/testsuite/gcc.dg/graphite/pr77362.c     (working copy)
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -floop-nest-optimize" } */
+
+int mc[2];
+int f2, sk;
+short int hm;
+
+void
+zm (void)
+{
+  int k1;
+
+  for (k1 = 0; k1 < 2; ++k1)
+    {
+      for (sk = 0; sk < 2; ++sk)
+       mc[sk] = hm = ++f2;
+      if (hm >= 0)
+       ++hm;
+    }
+}
+