fix wrong assert, expor copy_node_attr function to public API

[r26153]

include/libfirm/irnode.h

@@ -1355,6 +1355,12 @@ ir_mode *get_divop_resmod(const ir_node *node);
  *  operation: Cond. */
 int is_irn_forking(const ir_node *node);
 
+/**
+ * Copies all attributes stored in the old node  to the new node.
+ * Assumes both have the same opcode and sufficient size.
+ */
+void copy_node_attr(const ir_node *old_node, ir_node *new_node);
+
 /** Return the type associated with the value produced by n
  *  if the node remarks this type as it is the case for
  *  Cast, Const, SymConst and some Proj nodes or unknown_type. */

ir/ir/irgraph_t.h

@@ -250,7 +250,7 @@ _set_irg_current_block(ir_graph *irg, ir_node *node) {
 
 static inline ir_entity *
 _get_irg_entity(const ir_graph *irg) {
-	assert(irg && irg->ent);
+	assert(irg);
 	return irg->ent;
 }
 

ir/ir/irnode.c

@@ -2769,6 +2769,10 @@ int (is_irn_forking)(const ir_node *node) {
 	return _is_irn_forking(node);
 }
 
+void (copy_node_attr)(const ir_node *old_node, ir_node *new_node) {
+	return _copy_node_attr(old_node, new_node);
+}
+
 /* Return the type associated with the value produced by n
  * if the node remarks this type as it is the case for
  * Cast, Const, SymConst and some Proj nodes. */

ir/ir/irnode_t.h

@@ -140,7 +140,7 @@ _set_irn_op(ir_node *node, ir_op *op) {
 /** Copies all attributes stored in the old node  to the new node.
     Assumes both have the same opcode and sufficient size. */
 static inline void
-copy_node_attr(const ir_node *old_node, ir_node *new_node) {
+_copy_node_attr(const ir_node *old_node, ir_node *new_node) {
 	ir_op *op = _get_irn_op(old_node);
 
 	/* must always exist */
@@ -741,6 +741,7 @@ _is_arg_Proj(const ir_node *node) {
 #define is_Const_one(node)                    _is_Const_one(node)
 #define is_Const_all_one(node)                _is_Const_all_one(node)
 #define is_irn_forking(node)                  _is_irn_forking(node)
+#define copy_node_attr(oldn,newn)             _copy_node_attr(oldn,newn)
 #define get_irn_type(node)                    _get_irn_type(node)
 #define get_irn_type_attr(node)               _get_irn_type_attr(node)
 #define get_irn_entity_attr(node)             _get_irn_entity_attr(node)