re PR tree-optimization/50763 (ICE: verify_gimple failed: missing PHI def with -ftree-tail-merge)

2011-10-23  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/50763
	* gcc.dg/pr50763.c: New test.

From-SVN: r180342

gcc/testsuite/ChangeLog

+2011-10-23  Tom de Vries  <tom@codesourcery.com>
+
+	PR tree-optimization/50763
+	* gcc.dg/pr50763.c: New test.
+
 2011-10-23  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/50788

gcc/testsuite/gcc.dg/pr50763.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-tree-dominator-opts -fdump-tree-pre" } */
+
+int bar (int i);
+
+void
+foo (int c, int d)
+{
+  if (bar (c))
+    bar (c);
+  d = 33;
+  while (c == d);
+}
+
+/* { dg-final { scan-tree-dump-times "== 33" 1 "pre"} } */
+/* { dg-final { cleanup-tree-dump "pre" } } */