X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbeloopana.c;h=c62e5eff0cd7592d4eec6b6e8e443285a2f53682;hb=eba5516120eb38bcae5464e628aa0d2cb8708866;hp=f59b0762fff035514ef7d8658e5066c7fa48502a;hpb=58ea6ca3e853291444b41d537196e649f46a125d;p=libfirm diff --git a/ir/be/beloopana.c b/ir/be/beloopana.c index f59b0762f..c62e5eff0 100644 --- a/ir/be/beloopana.c +++ b/ir/be/beloopana.c @@ -1,11 +1,28 @@ -/** - * 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) 1995-2008 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" @@ -16,11 +33,18 @@ #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; @@ -31,12 +55,12 @@ typedef struct _be_loop_info_t { 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); } @@ -49,14 +73,19 @@ static int cmp_loop_info(const void *a, const void *b, size_t sz) { * @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; @@ -64,12 +93,14 @@ static unsigned be_compute_block_pressure(be_loopana_t *loop_ana, ir_node *block 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; } @@ -81,37 +112,40 @@ static unsigned be_compute_block_pressure(be_loopana_t *loop_ana, ir_node *block * @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; } - } - DBG((loop_ana->dbg, LEVEL_1, "Done with loop %d, pressure %u for class %s\n", loop->loop_nr, pressure, cls->name)); + + pressure = MAX(pressure, son_pressure); + } + 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; @@ -121,16 +155,26 @@ static unsigned be_compute_loop_pressure(be_loopana_t *loop_ana, ir_loop *loop, * Compute the register pressure for a class of all loops in the birg. * @param birg The backend irg object * @param cls The register class to compute the pressure for - * @return The loop analysation object. + * @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; } @@ -138,19 +182,28 @@ be_loopana_t *be_new_loop_pressure_cls(be_irg_t *birg, const arch_register_class /** * Compute the register pressure for all classes of all loops in the birg. * @param birg The backend irg object - * @return The loop analysation object. + * @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); + 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_env_get_n_reg_class(arch_env) - 1; i >= 0; --i) { + const arch_register_class_t *cls = arch_env_get_reg_class(arch_env, 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); } @@ -169,7 +222,7 @@ unsigned be_get_loop_pressure(be_loopana_t *loop_ana, const arch_register_class_ 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; @@ -180,9 +233,16 @@ unsigned be_get_loop_pressure(be_loopana_t *loop_ana, const arch_register_class_ } /** - * Frees loop analysation object. + * Frees the loop analysis object. */ void be_free_loop_pressure(be_loopana_t *loop_ana) { 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);