X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbetranshlp.c;h=32f346ed2bb2dd6d8528b343ecac53dac2aaf62e;hb=b9a1bfdbce56c76bd4d5ff772963628523ecfc41;hp=5428ee441aeb20a9cfbee06e4e8ba8dde0d3b0eb;hpb=7f34faa1fcd5a4547f67ffb41c597921ea1d2d2f;p=libfirm

diff --git a/ir/be/betranshlp.c b/ir/be/betranshlp.c
index 5428ee441..32f346ed2 100644
--- a/ir/be/betranshlp.c
+++ b/ir/be/betranshlp.c
@@ -87,6 +87,34 @@ void be_duplicate_deps(ir_node *old_node, ir_node *new_node)
 	}
 }
 
+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
@@ -186,9 +214,6 @@ ir_node *be_transform_node(ir_node *node)
 	DEBUG_ONLY(be_set_transformed_node(node, NULL);)
 
 	ir_op *op = get_irn_op(node);
-	if (op->ops.generic == NULL) {
-		panic("No transform function registered for node %+F.", node);
-	}
 	be_transform_func *transform = (be_transform_func *)op->ops.generic;
 
 	new_node = transform(node);
@@ -354,10 +379,8 @@ void be_transform_graph(ir_graph *irg, arch_pretrans_nodes *func)
 	current_ir_graph = irg;
 
 	/* create a new obstack */
-	struct obstack *old_obst = irg->obst;
-	struct obstack *new_obst = XMALLOC(struct obstack);
-	obstack_init(new_obst);
-	irg->obst = new_obst;
+	struct obstack old_obst = irg->obst;
+	obstack_init(&irg->obst);
 	irg->last_node_idx = 0;
 
 	free_vrp_data(irg);
@@ -369,8 +392,7 @@ void be_transform_graph(ir_graph *irg, arch_pretrans_nodes *func)
 	transform_nodes(irg, func);
 
 	/* free the old obstack */
-	obstack_free(old_obst, 0);
-	xfree(old_obst);
+	obstack_free(&old_obst, 0);
 
 	/* restore state */
 	current_ir_graph = old_current_ir_graph;
@@ -417,7 +439,6 @@ static bool and_upper_bits_clean(const ir_node *node, ir_mode *mode)
 static bool shr_upper_bits_clean(const ir_node *node, ir_mode *mode)
 {
 	if (mode_is_signed(mode)) {
-		/* TODO */
 		return false;
 	} else {
 		const ir_node *right = get_Shr_right(node);