ia32: Remove the unnecessary special case to get the latency of a CopyB.

ir/be/ia32/bearch_ia32.c

@@ -307,10 +307,7 @@ static int ia32_get_op_estimated_cost(const ir_node *irn)
 	cost  = get_ia32_latency(irn);
 	op_tp = get_ia32_op_type(irn);
 
-	if (is_ia32_CopyB(irn)) {
-		cost = 250;
-	}
-	else if (is_ia32_CopyB_i(irn)) {
+	if (is_ia32_CopyB_i(irn)) {
 		int size = get_ia32_copyb_size(irn);
 		cost     = 20 + (int)ceil((4/3) * size);
 	}

ir/be/ia32/ia32_spec.pl

@@ -1664,7 +1664,7 @@ CopyB => {
 	outs      => [ "dest", "source", "count", "M", "X_regular", "X_except" ],
 	attr_type => "ia32_copyb_attr_t",
 	attr      => "unsigned size",
-	latency   => 3,
+	latency   => 250,
 # we don't care about this flag, so no need to mark this node
 #	modified_flags => [ "DF" ]
 },