-/**
- * Author: Daniel Grund
- * Date: 25.05.2005
- * Copyright: (c) Universitaet Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+/*
+ * 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.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
*
- * Performs SSA-Destruction.
+ * 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 Performs SSA-Destruction.
+ * @author Daniel Grund
+ * @date 25.05.2005
+ * @version $Id$
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#include "be_t.h"
#include "beutil.h"
#include "bechordal_t.h"
-#include "bearch.h"
+#include "bearch_t.h"
#include "belive_t.h"
#include "benode_t.h"
#include "besched_t.h"
#include "benodesets.h"
#include "bestatevent.h"
+#include "beirg_t.h"
+#include "beintlive_t.h"
DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
#define is_curr_reg_class(irn) (get_reg_cls(p) == chordal_env->cls)
static void clear_link(ir_node *irn, void *data) {
+ (void) data;
set_irn_link(irn, NULL);
}
*/
static void collect_phis_walker(ir_node *irn, void *data) {
be_chordal_env_t *env = data;
- if(is_Phi(irn) && chordal_has_class(env, irn)) {
+ if (is_Phi(irn) && chordal_has_class(env, irn)) {
ir_node *bl = get_nodes_block(irn);
set_irn_link(irn, get_irn_link(bl));
set_irn_link(bl, irn);
static int cmp_perm_proj(const void *a, const void *b, size_t n) {
const perm_proj_t *p = a;
const perm_proj_t *q = b;
+ (void) n;
+
return !(p->arg == q->arg);
}
+typedef struct insert_all_perms_env_t {
+ be_chordal_env_t *chordal_env;
+ pmap *perm_map;
+} insert_all_perms_env_t;
+
/**
* Insert Perms in all predecessors of a block containing a phi
*/
static void insert_all_perms_walker(ir_node *bl, void *data) {
- be_chordal_env_t *chordal_env = data;
- pmap *perm_map = chordal_env->data;
+ insert_all_perms_env_t *env = data;
+ be_chordal_env_t *chordal_env = env->chordal_env;
+ pmap *perm_map = env->perm_map;
ir_graph *irg = chordal_env->irg;
+ be_lv_t *lv = chordal_env->birg->lv;
int i, n;
assert(is_Block(bl));
ir_node *arg = get_irn_n(phi, i);
unsigned hash = nodeset_hash(arg);
+ if (arch_irn_is(chordal_env->birg->main_env->arch_env, arg, ignore))
+ continue;
+
templ.arg = arg;
pp = set_find(arg_set, &templ, sizeof(templ), hash);
* interferes with the phi and must thus not be member of a
* Perm. A copy will be inserted for this argument alter on.
*/
- if(!pp && !be_is_live_in(chordal_env->lv, bl, arg)) {
+ if(!pp && !be_is_live_in(lv, bl, arg)) {
templ.pos = n_projs++;
set_insert(arg_set, &templ, sizeof(templ), hash);
}
perm = be_new_Perm(chordal_env->cls, irg, pred_bl, n_projs, in);
be_stat_ev("phi_perm", n_projs);
- free(in);
insert_after = sched_skip(sched_last(pred_bl), 0, sched_skip_cf_predicator, chordal_env->birg->main_env->arch_env);
sched_add_after(insert_after, perm);
pp->proj = proj;
assert(get_reg(pp->arg));
set_reg(proj, get_reg(pp->arg));
+#ifdef SCHEDULE_PROJS
sched_add_after(insert_after, proj);
+#endif
insert_after = proj;
DBG((dbg, LEVEL_2, "Copy register assignment %s from %+F to %+F\n", get_reg(pp->arg)->name, pp->arg, pp->proj));
}
pp = set_find(arg_set, &templ, sizeof(templ), nodeset_hash(templ.arg));
/* If not found, it was an interfering argument */
- if (pp)
+ if (pp) {
set_irn_n(phi, i, pp->proj);
+ be_liveness_introduce(lv, pp->proj);
+ }
+ }
+
+ /* update the liveness of the Perm's operands. It might be changed. */
+ {
+ int i;
+ for (i = 0; i < n_projs; ++i)
+ be_liveness_update(lv, in[i]);
}
+ free(in);
/* register in perm map */
pmap_insert(perm_map, pred_bl, perm);
*/
static void set_regs_or_place_dupls_walker(ir_node *bl, void *data) {
be_chordal_env_t *chordal_env = data;
+ be_lv_t *lv = chordal_env->birg->lv;
ir_node *phi;
/* Consider all phis of this block */
arg_block = get_Block_cfgpred_block(phi_block, i);
arg_reg = get_reg(arg);
+ if (arch_irn_is(chordal_env->birg->main_env->arch_env, arg, ignore))
+ continue;
+
assert(arg_reg && "Register must be set while placing perms");
DBG((dbg, LEVEL_1, " for %+F(%s) -- %+F(%s)\n", phi, phi_reg->name, arg, arg_reg->name));
- if(values_interfere(chordal_env->lv, phi, arg)) {
+ if (values_interfere(chordal_env->birg, phi, arg)) {
/*
Insert a duplicate in arguments block,
make it the new phi arg,
set_reg(dupl, phi_reg);
sched_add_after(sched_skip(sched_last(arg_block), 0, sched_skip_cf_predicator, chordal_env->birg->main_env->arch_env), dupl);
pin_irn(dupl, phi_block);
+ be_liveness_introduce(lv, dupl);
+ be_liveness_update(lv, arg);
DBG((dbg, LEVEL_1, " they do interfere: insert %+F(%s)\n", dupl, get_reg(dupl)->name));
continue; /* with next argument */
}
for(ins = sched_next(perm); is_Proj(ins); ins = sched_next(ins));
sched_add_before(ins, dupl);
pin_irn(dupl, phi_block);
+ be_liveness_introduce(lv, dupl);
+ be_liveness_update(lv, arg);
DBG((dbg, LEVEL_1, " arg is pinned: insert %+F(%s)\n", dupl, get_reg(dupl)->name));
} else {
/*
}
void be_ssa_destruction(be_chordal_env_t *chordal_env) {
+ insert_all_perms_env_t insert_perms_env;
pmap *perm_map = pmap_create();
ir_graph *irg = chordal_env->irg;
+ be_lv_t *lv = be_assure_liveness(chordal_env->birg);
FIRM_DBG_REGISTER(dbg, "ir.be.ssadestr");
+ be_liveness_invalidate(lv);
+ be_liveness_assure_sets(lv);
+
/* create a map for fast lookup of perms: block --> perm */
- chordal_env->data = perm_map;
irg_walk_graph(irg, clear_link, collect_phis_walker, chordal_env);
DBG((dbg, LEVEL_1, "Placing perms...\n"));
- irg_block_walk_graph(irg, insert_all_perms_walker, NULL, chordal_env);
+ insert_perms_env.chordal_env = chordal_env;
+ insert_perms_env.perm_map = perm_map;
+ irg_block_walk_graph(irg, insert_all_perms_walker, NULL, &insert_perms_env);
+
+ // Matze: really needed here?
+ // Sebastian: Yes. the walker function uses interference.
+ be_liveness_invalidate(lv);
if (chordal_env->opts->dump_flags & BE_CH_DUMP_SSADESTR)
be_dump(irg, "-ssa_destr_perms_placed", dump_ir_block_graph_sched);
- be_liveness_recompute(chordal_env->lv);
+ be_liveness_assure_chk(lv);
DBG((dbg, LEVEL_1, "Setting regs and placing dupls...\n"));
irg_block_walk_graph(irg, set_regs_or_place_dupls_walker, NULL, chordal_env);
+ /* TODO: unfortunaltely updating doesn't work yet. */
+ be_liveness_invalidate(lv);
+
if (chordal_env->opts->dump_flags & BE_CH_DUMP_SSADESTR)
be_dump(irg, "-ssa_destr_regs_set", dump_ir_block_graph_sched);
for (i = 0, max = get_irn_arity(phi); i < max; ++i) {
ir_node *arg = get_irn_n(phi, i);
+ if (arch_irn_is(chordal_env->birg->main_env->arch_env, arg, ignore))
+ continue;
+
arg_reg = get_reg(arg);
if (phi_reg != arg_reg) {
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