Add test case for this patch to combine.c:

	* combine.c (simplify_comparison): Use an unsigned shift to adjust
	the constant.

From-SVN: r29620

gcc/testsuite/gcc.c-torture/ChangeLog

+1999-09-23  Nick Clifton  <nickc@cygnus.com>
+
+	* execute/990923-1.c: New test.
+
 1999-09-21  Nick Clifton  <nickc@cygnus.com>
 
 	* special/special.exp: Add FR30 to list of targets for which -fpic

gcc/testsuite/gcc.c-torture/execute/990923-1.c

+#define mask  0xffff0000L
+#define value 0xabcd0000L
+
+long
+foo (long x)
+{
+  if ((x & mask) == value)
+    return x & 0xffffL;
+  return 1;
+}
+
+int 
+main (void)
+{
+  if (foo (value) != 0 || foo (0) != 1)
+    abort ();
+  
+  exit (0);
+}