re PR rtl-optimization/20412 (RTL checking failure in the combiner)

	PR rtl-opt/20412
	* simplify-rtx.c (simplify_relational_operation_1): Fix typo - check the
	correct mode.

	PR rtl-opt/20412
	* gcc.c-torture/compile/pr20412.c: New test.

From-SVN: r96264

gcc/ChangeLog

+2005-03-10  Andrew Pinski  <pinskia@physics.uc.edu>
+
+	PR rtl-opt/20412
+	* simplify-rtx.c (simplify_relational_operation_1): Fix typo - check the
+	correct mode.
+
 2005-03-10  Roger Sayle  <roger@eyesopen.com>
 
 	* builtins.c (expand_builtin_signbit): Extend to handle floating

gcc/simplify-rtx.c

@@ -2882,7 +2882,7 @@ simplify_relational_operation_1 (enum rtx_code code, enum machine_mode mode,
 	  /* If op0 is a comparison, extract the comparison arguments form it.  */
 	  if (code == NE)
 	    {
-	      if (GET_MODE (op0) == cmp_mode)
+	      if (GET_MODE (op0) == mode)
 		return simplify_rtx (op0);
 	      else
 		return simplify_gen_relational (GET_CODE (op0), mode, VOIDmode,

gcc/testsuite/ChangeLog

+2005-03-10  Andrew Pinski  <pinskia@physics.uc.edu>
+
+	PR rtl-opt/20412
+	* gcc.c-torture/compile/pr20412.c: New test.
+
 2005-03-10  Roger Sayle  <roger@eyesopen.com>
 
 	* gcc.dg/builtins-32.c: Add new run-time tests for long double.

gcc/testsuite/gcc.c-torture/compile/pr20412.c

+int
+foo(void)
+{
+  int      a,b,g;
+  int      i,len;
+  int      stop;
+                                                                     
+  len = 10;
+  stop = 0;
+  for (i=0; i<len; i++)
+  {
+    a = bar1() ? 0 : 1;
+    b = bar2() ? 0 : 1;
+    g = bar3() ? 0 : 1;
+                                                                     
+    if (stop = ((a+b) % 2 != g)) break;
+  }
+ 
+  return stop;
+}