+ir_node *be_transform_phi(ir_node *node, const arch_register_req_t *req)
+{
+ ir_node *block = be_transform_node(get_nodes_block(node));
+ ir_graph *irg = get_Block_irg(block);
+ dbg_info *dbgi = get_irn_dbg_info(node);
+
+ /* phi nodes allow loops, so we use the old arguments for now
+ * and fix this later */
+ ir_node **ins = get_irn_in(node)+1;
+ int arity = get_irn_arity(node);
+ ir_mode *mode = req->cls != NULL ? req->cls->mode : get_irn_mode(node);
+ ir_node *phi = new_ir_node(dbgi, irg, block, op_Phi, mode, arity, ins);
+ copy_node_attr(irg, node, phi);
+ be_duplicate_deps(node, phi);
+
+ backend_info_t *info = be_get_info(phi);
+ struct obstack *obst = be_get_be_obst(irg);
+ info->in_reqs = OALLOCN(obst, const arch_register_req_t*, arity);
+ for (int i = 0; i < arity; ++i) {
+ info->in_reqs[i] = req;
+ }
+
+ arch_set_irn_register_req_out(phi, 0, req);
+ be_enqueue_preds(node);
+
+ return phi;
+}
+
+void be_set_transform_function(ir_op *op, be_transform_func func)
+{
+ /* shouldn't be assigned twice (except for exchanging the default
+ * be_duplicate_node entries) */
+ assert(op->ops.generic == NULL
+ || op->ops.generic == (op_func) be_duplicate_node);
+ op->ops.generic = (op_func) func;
+}
+
+/**
+ * Transform helper for blocks.
+ */
+static ir_node *transform_block(ir_node *node)
+{
+ ir_graph *irg = get_irn_irg(node);
+ dbg_info *dbgi = get_irn_dbg_info(node);
+ ir_mode *mode = get_irn_mode(node);
+ ir_node *block = new_ir_node(dbgi, irg, NULL, get_irn_op(node), mode,
+ get_irn_arity(node), get_irn_in(node) + 1);
+ copy_node_attr(irg, node, block);
+ block->node_nr = node->node_nr;
+
+ /* transfer execfreq value */
+ double execfreq = get_block_execfreq(node);
+ set_block_execfreq(block, execfreq);
+
+ /* put the preds in the worklist */
+ be_enqueue_preds(node);
+
+ return block;
+}
+
+static ir_node *transform_end(ir_node *node)
+{
+ /* end has to be duplicated manually because we need a dynamic in array */
+ ir_graph *irg = get_irn_irg(node);
+ dbg_info *dbgi = get_irn_dbg_info(node);
+ ir_node *block = be_transform_node(get_nodes_block(node));
+ ir_node *new_end = new_ir_node(dbgi, irg, block, op_End, mode_X, -1, NULL);
+ copy_node_attr(irg, node, new_end);
+ be_duplicate_deps(node, new_end);
+
+ set_irg_end(irg, new_end);
+
+ /* do not transform predecessors yet to keep the pre-transform
+ * phase from visiting all the graph */
+ int arity = get_irn_arity(node);
+ for (int i = 0; i < arity; ++i) {
+ ir_node *in = get_irn_n(node, i);
+ add_End_keepalive(new_end, in);
+ }
+ be_enqueue_preds(node);
+
+ return new_end;
+}
+
+ir_node *be_duplicate_node(ir_node *node)
+{