-/**
- * Author: Christian Wuerdig
- * Date: 2007/02/19
- * Copyright: (c) Universitaet Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
- * CVS-Id: $Id$
+/*
+ * Copyright (C) 1995-2007 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.
*
- * Compute register pressure in loops
+ * 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
+ * @brief Compute register pressure in loops.
+ * @author Christian Wuerdig
+ * @date 19.02.2007
+ * @version $Id$
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#include "irnode.h"
#include "irtools.h"
#include "irloop_t.h"
+#include "error.h"
+#include "debug.h"
-#include "bearch.h"
+#include "bearch_t.h"
#include "belive.h"
#include "besched.h"
#include "beloopana.h"
+#include "bemodule.h"
+
+DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL);
+
+#define HASH_LOOP_INFO(info) (HASH_PTR((info)->loop) ^ HASH_PTR((info)->cls))
typedef struct _be_loop_info_t {
ir_loop *loop;
struct _be_loopana_t {
set *data;
be_irg_t *birg;
- DEBUG_ONLY(firm_dbg_module_t *dbg);
};
-static int cmp_loop_info(const void *a, const void *b, size_t sz) {
+static int cmp_loop_info(const void *a, const void *b, size_t size) {
const be_loop_info_t *i1 = a;
const be_loop_info_t *i2 = b;
+ (void) size;
return ! (i1->loop == i2->loop && i1->cls == i2->cls);
}
* @return The highest register pressure in the given block.
*/
static unsigned be_compute_block_pressure(be_loopana_t *loop_ana, ir_node *block, const arch_register_class_t *cls) {
- const arch_env_t *aenv = loop_ana->birg->main_env->arch_env;
- pset *live_nodes = pset_new_ptr_default();
+ const be_irg_t *birg = loop_ana->birg;
+ const arch_env_t *aenv = be_get_birg_arch_env(birg);
+ be_lv_t *lv = be_get_birg_liveness(birg);
+ ir_nodeset_t live_nodes;
ir_node *irn;
int max_live;
+ DBG((dbg, LEVEL_1, "Processing Block %+F\n", block));
+
/* determine largest pressure with this block */
- live_nodes = be_liveness_end_of_block(loop_ana->birg->lv, aenv, cls, block, live_nodes);
- max_live = pset_count(live_nodes);
+ ir_nodeset_init(&live_nodes);
+ be_liveness_end_of_block(lv, aenv, cls, block, &live_nodes);
+ max_live = ir_nodeset_size(&live_nodes);
sched_foreach_reverse(block, irn) {
int cnt;
if (is_Phi(irn))
break;
- live_nodes = be_liveness_transfer(aenv, cls, irn, live_nodes);
- cnt = pset_count(live_nodes);
+ be_liveness_transfer(aenv, cls, irn, &live_nodes);
+ cnt = ir_nodeset_size(&live_nodes);
max_live = MAX(cnt, max_live);
}
- del_pset(live_nodes);
+ DBG((dbg, LEVEL_1, "Finished with Block %+F (%s %u)\n", block, cls->name, max_live));
+
+ ir_nodeset_destroy(&live_nodes);
return max_live;
}
* @return The highest register pressure in the given loop.
*/
static unsigned be_compute_loop_pressure(be_loopana_t *loop_ana, ir_loop *loop, const arch_register_class_t *cls) {
- int i, max, pressure;
+ int i, max;
+ unsigned pressure;
be_loop_info_t *entry, key;
- DBG((loop_ana->dbg, LEVEL_1, "Processing Loop %d\n", loop->loop_nr));
+ DBG((dbg, LEVEL_1, "\nProcessing Loop %d\n", loop->loop_nr));
assert(get_loop_n_elements(loop) > 0);
pressure = 0;
/* determine maximal pressure in all loop elements */
for (i = 0, max = get_loop_n_elements(loop); i < max; ++i) {
+ unsigned son_pressure;
loop_element elem = get_loop_element(loop, i);
+
switch (*elem.kind) {
case k_ir_node:
- pressure = be_compute_block_pressure(loop_ana, elem.node, cls);
+ son_pressure = be_compute_block_pressure(loop_ana, elem.node, cls);
break;
- case k_ir_loop: {
- unsigned son_pressure = be_compute_loop_pressure(loop_ana, elem.son, cls);
- pressure = MAX(pressure, son_pressure);
+ case k_ir_loop:
+ son_pressure = be_compute_loop_pressure(loop_ana, elem.son, cls);
break;
- }
default:
- assert(0);
+ panic("Unknown element found in loop");
break;
}
+
+ pressure = MAX(pressure, son_pressure);
}
- DBG((loop_ana->dbg, LEVEL_1, "Done with loop %d, pressure %u for class %s\n", loop->loop_nr, pressure, cls->name));
+ DBG((dbg, LEVEL_1, "Done with loop %d, pressure %u for class %s\n", loop->loop_nr, pressure, cls->name));
/* update info in set */
- key.loop = loop;
- key.loop = 0;
- key.cls = cls;
- entry = set_insert(loop_ana->data, &key, sizeof(key), HASH_PTR(loop));
+ key.loop = loop;
+ key.cls = cls;
+ key.max_pressure = 0;
+ entry = set_insert(loop_ana->data, &key, sizeof(key), HASH_LOOP_INFO(&key));
entry->max_pressure = MAX(entry->max_pressure, pressure);
return pressure;
* @param cls The register class to compute the pressure for
* @return The loop analysis object.
*/
-be_loopana_t *be_new_loop_pressure_cls(be_irg_t *birg, const arch_register_class_t *cls) {
- be_loopana_t *loop_ana = xmalloc(sizeof(loop_ana));
+be_loopana_t *be_new_loop_pressure_cls(be_irg_t *birg,
+ const arch_register_class_t *cls) {
+ ir_graph *irg = be_get_birg_irg(birg);
+ be_loopana_t *loop_ana = xmalloc(sizeof(*loop_ana));
loop_ana->data = new_set(cmp_loop_info, 16);
loop_ana->birg = birg;
- FIRM_DBG_REGISTER(loop_ana->dbg, "firm.be.loopana");
- be_compute_loop_pressure(loop_ana, get_irg_loop(birg->irg), cls);
+ DBG((dbg, LEVEL_1, "\n=====================================================\n", cls->name));
+ DBG((dbg, LEVEL_1, " Computing register pressure for class %s:\n", cls->name));
+ DBG((dbg, LEVEL_1, "=====================================================\n", cls->name));
+
+ /* construct control flow loop tree */
+ if (! (get_irg_loopinfo_state(irg) & loopinfo_cf_consistent)) {
+ construct_cf_backedges(irg);
+ }
+
+ be_compute_loop_pressure(loop_ana, get_irg_loop(irg), cls);
return loop_ana;
}
* @return The loop analysis object.
*/
be_loopana_t *be_new_loop_pressure(be_irg_t *birg) {
- be_loopana_t *loop_ana = xmalloc(sizeof(loop_ana));
- ir_loop *irg_loop = get_irg_loop(birg->irg);
- int i;
+ ir_graph *irg = be_get_birg_irg(birg);
+ be_loopana_t *loop_ana = xmalloc(sizeof(*loop_ana));
+ ir_loop *irg_loop = get_irg_loop(irg);
+ const arch_env_t *arch_env = be_get_birg_arch_env(birg);
+ const arch_isa_t *isa = arch_env->isa;
+ int i;
loop_ana->data = new_set(cmp_loop_info, 16);
loop_ana->birg = birg;
- FIRM_DBG_REGISTER(loop_ana->dbg, "firm.be.loopana");
- for (i = arch_isa_get_n_reg_class(birg->main_env->arch_env->isa) - 1; i >= 0; --i) {
- const arch_register_class_t *cls = arch_isa_get_reg_class(birg->main_env->arch_env->isa, i);
+ /* construct control flow loop tree */
+ if (! (get_irg_loopinfo_state(irg) & loopinfo_cf_consistent)) {
+ construct_cf_backedges(irg);
+ }
+
+ for (i = arch_isa_get_n_reg_class(isa) - 1; i >= 0; --i) {
+ const arch_register_class_t *cls = arch_isa_get_reg_class(isa, i);
+ DBG((dbg, LEVEL_1, "\n=====================================================\n", cls->name));
+ DBG((dbg, LEVEL_1, " Computing register pressure for class %s:\n", cls->name));
+ DBG((dbg, LEVEL_1, "=====================================================\n", cls->name));
be_compute_loop_pressure(loop_ana, irg_loop, cls);
}
key.loop = loop;
key.cls = cls;
- entry = set_find(loop_ana->data, &key, sizeof(key), HASH_PTR(&key));
+ entry = set_find(loop_ana->data, &key, sizeof(key), HASH_LOOP_INFO(&key));
if (entry)
pressure = entry->max_pressure;
del_set(loop_ana->data);
xfree(loop_ana);
}
+
+void be_init_loopana(void)
+{
+ FIRM_DBG_REGISTER(dbg, "firm.be.loopana");
+}
+
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_loopana);
projects / libfirm / blobdiff