2003-06-30  Denis Chertykov  <denisc@overta.ru>
            Richard Kenner <kenner@vlsi1.ultra.nyu.edu>

	* combine.c (gen_binary): Handle the CLOBBER rtx and
	don't build a binary operation with it.


diff -urN gcc-3.3.1.orig/gcc/combine.c gcc-3.3.1/gcc/combine.c
--- gcc-3.3.1.orig/gcc/combine.c	2003-03-24 03:37:32.000000000 -0800
+++ gcc-3.3.1/gcc/combine.c	2003-08-08 15:26:26.000000000 -0700
@@ -10209,6 +10209,11 @@
   rtx result;
   rtx tem;
 
+  if (GET_CODE (op0) == CLOBBER)
+    return op0;
+  else if (GET_CODE (op1) == CLOBBER)
+    return op1;
+  
   if (GET_RTX_CLASS (code) == 'c'
       && swap_commutative_operands_p (op0, op1))
     tem = op0, op0 = op1, op1 = tem;