/*
- * Project: libFIRM
- * File name: ir/opt/opt_frame.c
- * Purpose: optimize the frame type
- * Author: Michael Beck
- * Created: 15.03.2006
- * CVS-ID: $Id$
- * Copyright: (c) 1998-2006 Universität Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
+ *
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
*/
/**
- * @file opt_frame.c
- *
- * Optimize the frame type by removing unused type members.
+ * @file
+ * @brief Optimize the frame type.
+ * @date 15.03.2006
+ * @author Michael Beck
+ * @brief
+ * Optimize the frame type by removing unused type members.
*/
-
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
+#include "iroptimize.h"
#include "irgraph_t.h"
#include "type_t.h"
#include "irouts.h"
#include "iredges.h"
-#include "opt_frame.h"
+#include "irpass.h"
/*
* Optimize the frame type of an irg by removing
* never touched entities.
*/
-void opt_frame_irg(ir_graph *irg) {
- ir_type *frame_tp = get_irg_frame_type(irg);
- entity *ent, *list;
- ir_node *frame, *sel;
- int i, n = get_class_n_members(frame_tp);
+void opt_frame_irg(ir_graph *irg)
+{
+ ir_type *frame_tp = get_irg_frame_type(irg);
+ ir_entity *ent, *list;
+ ir_node *frame, *sel;
+ size_t i, n = get_class_n_members(frame_tp);
+ int o;
+
+ if (n <= 0)
+ return;
- assert(get_irg_phase_state(irg) == phase_high && "Graph must be in high phase");
- if (n <= 0)
- return;
+ assure_irg_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_OUTS);
- /* clear all entity links */
- for (i = n - 1; i >= 0; --i) {
- ent = get_class_member(frame_tp, i);
- set_entity_link(ent, NULL);
- }
+ irp_reserve_resources(irp, IRP_RESOURCE_ENTITY_LINK);
- /* look for uses */
- frame = get_irg_frame(irg);
+ /* clear all entity links */
+ for (i = n; i > 0;) {
+ ent = get_class_member(frame_tp, --i);
+ set_entity_link(ent, NULL);
+ }
- if (edges_activated(irg)) { /* use inplace edges */
- const ir_edge_t *edge;
+ /* look for uses */
+ frame = get_irg_frame(irg);
- /* mark all used entities */
- foreach_out_edge(frame, edge) {
- sel = get_edge_src_irn(edge);
- ent = get_Sel_entity(sel);
- set_entity_link(ent, ent);
- }
- }
- else {
- /* use traditionally out edges */
- if (get_irg_outs_state(irg) != outs_consistent)
- compute_irg_outs(irg);
+ /* mark all used entities */
+ for (o = get_irn_n_outs(frame) - 1; o >= 0; --o) {
+ sel = get_irn_out(frame, o);
+ if (is_Sel(sel)) {
+ ent = get_Sel_entity(sel);
+ /* only entities on the frame */
+ if (get_entity_owner(ent) == frame_tp)
+ set_entity_link(ent, ent);
+ }
+ }
- /* mark all used entities */
- for (i = get_irn_n_outs(frame) - 1; i >= 0; --i) {
- sel = get_irn_out(frame, i);
- ent = get_Sel_entity(sel);
- set_entity_link(ent, ent);
- }
- }
+ /* link unused ones */
+ list = NULL;
+ for (i = n; i > 0;) {
+ ent = get_class_member(frame_tp, --i);
+ /* beware of inner functions: those are NOT unused */
+ if (get_entity_link(ent) == NULL && !is_method_entity(ent)) {
+ set_entity_link(ent, list);
+ list = ent;
+ }
+ }
- /* link unused ones */
- list = NULL;
- for (i = n - 1; i >= 0; --i) {
- ent = get_class_member(frame_tp, i);
- if (get_entity_link(ent) == NULL) {
- set_entity_link(ent, list);
- list = ent;
- }
- }
+ if (list != NULL) {
+ /* delete list members */
+ for (ent = list; ent; ent = list) {
+ list = (ir_entity*)get_entity_link(ent);
+ free_entity(ent);
+ }
+ /* we changed the frame type, its layout should be redefined */
+ set_type_state(frame_tp, layout_undefined);
+ }
+ irp_free_resources(irp, IRP_RESOURCE_ENTITY_LINK);
+
+ /* we changed the type, this affects none of the currently known graph
+ * properties, but I don't use ALL because I don't know if someone adds
+ * type-based properties at some point */
+ confirm_irg_properties(irg,
+ IR_GRAPH_PROPERTIES_CONTROL_FLOW
+ | IR_GRAPH_PROPERTY_NO_BADS
+ | IR_GRAPH_PROPERTY_NO_TUPLES
+ | IR_GRAPH_PROPERTY_CONSISTENT_OUT_EDGES
+ | IR_GRAPH_PROPERTY_CONSISTENT_OUTS
+ | IR_GRAPH_PROPERTY_CONSISTENT_ENTITY_USAGE
+ | IR_GRAPH_PROPERTY_MANY_RETURNS);
+}
- if (list) {
- /* delete list members */
- for (ent = list; ent; ent = list) {
- list = get_entity_link(ent);
- remove_class_member(frame_tp, ent);
- }
- /* we changed the frame type, it's layout should be redefined */
- set_type_state(frame_tp, layout_undefined);
- }
+ir_graph_pass_t *opt_frame_irg_pass(const char *name)
+{
+ return def_graph_pass(name ? name : "opt_frame_irg", opt_frame_irg);
}
projects / libfirm / blobdiff