make be_transform_node slightly more efficient

[r17380]

diff --git a/ir/be/betranshlp.c b/ir/be/betranshlp.c
index 8d80986..20551c2 100644 (file)
--- a/ir/be/betranshlp.c
+++ b/ir/be/betranshlp.c
@@ -65,8 +65,12 @@ int be_is_transformed(const ir_node *node) {
 }
 
 static INLINE ir_node *be_get_transformed_node(ir_node *old_node) {
-       assert(irn_visited(old_node));
-       return (ir_node*) get_irn_link(old_node);
+       if (irn_visited(old_node)) {
+               ir_node *new_node = get_irn_link(old_node);
+               assert(new_node != NULL);
+               return new_node;
+       }
+       return NULL;
 }
 
 void be_duplicate_deps(ir_node *old_node, ir_node *new_node) {
@@ -122,14 +126,11 @@ ir_node *be_duplicate_node(ir_node *node) {
  * Calls transformation function for given node and marks it visited.
  */
 ir_node *be_transform_node(ir_node *node) {
-       ir_node *new_node;
        ir_op   *op;
+       ir_node *new_node = be_get_transformed_node(node);
 
-       if (irn_visited(node)) {
-               new_node = be_get_transformed_node(node);
-               assert(new_node != NULL);
+       if (new_node != NULL)
                return new_node;
-       }
 
        mark_irn_visited(node);
        DEBUG_ONLY(be_set_transformed_node(node, NULL));