re PR middle-end/23960 (ICE in compare_values in VRP)

gcc/
	PR tree-optimization/23960
	* fold-const.c (fold_binary): Use op0 and op1 instead of arg0
	and arg1 if we are passing them to fold_build2.

gcc/testsuite/
	PR tree-optimization/23960
	* gcc.c-torture/compile/pr23960.c: New.

From-SVN: r104634

gcc/ChangeLog

+2005-09-25  Kazu Hirata  <kazu@codesourcery.com>
+
+	* fold-const.c (fold_binary): Use op0 and op1 instead of arg0
+	and arg1 if we are passing them to fold_build2.
+
 2005-09-25  Dan Nicolaescu  <dann@ics.uci.edu>
 
 	PR 23828

gcc/fold-const.c

@@ -9285,7 +9285,7 @@ fold_binary (enum tree_code code, tree type, tree op0, tree op1)
 		  return omit_one_operand (type, integer_one_node, arg0);
 
 		case GT_EXPR:
-		  return fold_build2 (NE_EXPR, type, arg0, arg1);
+		  return fold_build2 (NE_EXPR, type, op0, op1);
 
 		default:
 		  break;

gcc/testsuite/ChangeLog

+2005-09-25  Kazu Hirata  <kazu@codesourcery.com>
+
+	PR tree-optimization/23960
+	* gcc.c-torture/compile/pr23960.c: New.
+
 2005-09-23  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/16861

gcc/testsuite/gcc.c-torture/compile/pr23960.c

+/* PR tree-optimization/23960
+   fold-const.c used to construct a comparison node with one pointer
+   operand and one non-pointer operand.  */
+
+void abort (void) __attribute__ ((noreturn));
+
+void
+foo (char *d, unsigned long int n)
+{ 
+  if (d + n > d)
+    abort ();
+}