--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20030807-3.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,28 @@
+/* { dg-do compile } */
+/* { dg-options "-O1 -fdump-tree-dom2" } */
+                                                                                
+typedef unsigned int cppchar_t;
+void foo (void);
+cppchar_t oof (void);
+cppchar_t
+cpp_parse_escape (pstr, limit, wide)
+     const unsigned char **pstr;
+     const unsigned char *limit;
+     int wide;
+{
+  cppchar_t i = 0;
+  int overflow = 0;
+  cppchar_t mask = ~0;
+
+   while (*pstr < limit)
+     {
+       overflow |= i ^ (i << 4 >> 4);
+       i = oof ();
+     }
+   if (overflow |  (i != (i & mask)))
+     foo();
+}
+
+/* There should be precisely three IF statements.  If there is
+   more than two, then the dominator optimizations failed.  */
+/* { dg-final { scan-tree-dump-times "if " 3 "dom2"} } */