--- gcc/ipa-pure-const.c.jj	2010-08-11 16:06:19.000000000 +0200
+++ gcc/ipa-pure-const.c	2010-11-15 20:06:36.121310614 +0100
@@ -460,7 +460,10 @@ check_stmt (gimple_stmt_iterator *gsip, 
       for (i = 0; i < gimple_asm_nclobbers (stmt); i++)
 	{
 	  tree op = gimple_asm_clobber_op (stmt, i);
-	  if (simple_cst_equal(TREE_VALUE (op), memory_identifier_string) == 1)
+	  if (TREE_CODE (TREE_VALUE (op)) == STRING_CST
+	      && TREE_STRING_LENGTH (TREE_VALUE (op)) == sizeof ("memory")
+	      && memcmp (TREE_STRING_POINTER (TREE_VALUE (op)), "memory",
+			 sizeof ("memory")) == 0)
 	    {
               if (dump_file)
                 fprintf (dump_file, "    memory asm clobber is not const/pure");