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

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

Co-Authored-By: Richard Kenner <kenner@vlsi1.ultra.nyu.edu>

From-SVN: r69199

gcc/ChangeLog

+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.
+
 2003-07-10  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>
 
 	* gcse.c (load_kills_store, find_loads, store_killed_in_insn,

gcc/combine.c

@@ -10171,6 +10171,11 @@ gen_binary (enum rtx_code code, enum machine_mode mode, rtx op0, rtx op1)
   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;