X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbeloopana.c;h=a5e7be2618cfbcbcbb9ff0182fe8db533adba0c8;hb=413caa540c4f2d6456cf5cfba73eecffad4fd160;hp=047069db28acd41e2d09b995c3d7b6efd41fb2f5;hpb=06689bfead82631c9c022c3e28977bd7db6d9f6e;p=libfirm diff --git a/ir/be/beloopana.c b/ir/be/beloopana.c index 047069db2..a5e7be261 100644 --- a/ir/be/beloopana.c +++ b/ir/be/beloopana.c @@ -1,26 +1,48 @@ -/** - * 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. + * + * Licensees holding valid libFirm Professional Edition licenses may use + * this file in accordance with the libFirm Commercial License. + * Agreement provided with the Software. * - * Compute register pressure in loops + * 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" -#endif #include "set.h" #include "pset.h" #include "irnode.h" #include "irtools.h" #include "irloop_t.h" +#include "error.h" +#include "debug.h" #include "bearch.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; @@ -31,32 +53,38 @@ 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); } /** * Compute the highest register pressure in a block. - * @param loop_ana The loop ana object. + * @param birg The graph. * @param block The block to compute pressure for. * @param cls The register class to compute pressure for. * @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(); - ir_node *irn; - int max_live; +static unsigned be_compute_block_pressure(const be_irg_t *birg, + ir_node *block, const arch_register_class_t *cls) +{ + 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, cls, block, &live_nodes); + max_live = ir_nodeset_size(&live_nodes); sched_foreach_reverse(block, irn) { int cnt; @@ -64,12 +92,14 @@ 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); - max_live = MAX(cnt, max_live); + be_liveness_transfer(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; } @@ -80,38 +110,37 @@ static unsigned be_compute_block_pressure(be_loopana_t *loop_ana, ir_node *block * @param cls The register class to compute pressure for. * @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; +static unsigned be_compute_loop_pressure(be_loopana_t *loop_ana, ir_loop *loop, const arch_register_class_t *cls) +{ + 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); - break; - case k_ir_loop: { - unsigned son_pressure = be_compute_loop_pressure(loop_ana, elem.son, cls); - pressure = MAX(pressure, son_pressure); - break; - } - default: - assert(0); - break; + + if (*elem.kind == k_ir_node) + son_pressure = be_compute_block_pressure(loop_ana->birg, elem.node, cls); + else { + assert(*elem.kind == k_ir_loop); + son_pressure = be_compute_loop_pressure(loop_ana, elem.son, cls); } - } - 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; @@ -123,14 +152,25 @@ static unsigned be_compute_loop_pressure(be_loopana_t *loop_ana, ir_loop *loop, * @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(be_loopana_t); 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; } @@ -140,18 +180,33 @@ be_loopana_t *be_new_loop_pressure_cls(be_irg_t *birg, const arch_register_class * @param birg The backend irg 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; +be_loopana_t *be_new_loop_pressure(be_irg_t *birg, + const arch_register_class_t *cls) +{ + ir_graph *irg = be_get_birg_irg(birg); + be_loopana_t *loop_ana = XMALLOC(be_loopana_t); + 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); + } + + if (cls != NULL) { be_compute_loop_pressure(loop_ana, irg_loop, cls); + } else { + 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); + } } return loop_ana; @@ -161,7 +216,8 @@ be_loopana_t *be_new_loop_pressure(be_irg_t *birg) { * Returns the computed register pressure for the given class and loop. * @return The pressure or INT_MAX if not found */ -unsigned be_get_loop_pressure(be_loopana_t *loop_ana, const arch_register_class_t *cls, ir_loop *loop) { +unsigned be_get_loop_pressure(be_loopana_t *loop_ana, const arch_register_class_t *cls, ir_loop *loop) +{ unsigned pressure = INT_MAX; be_loop_info_t *entry, key; @@ -169,12 +225,12 @@ 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; else - assert(0 && "Pressure not computed for given class and loop object."); + panic("Pressure not computed for given class and loop object."); return pressure; } @@ -182,7 +238,14 @@ unsigned be_get_loop_pressure(be_loopana_t *loop_ana, const arch_register_class_ /** * Frees the loop analysis object. */ -void be_free_loop_pressure(be_loopana_t *loop_ana) { +void be_free_loop_pressure(be_loopana_t *loop_ana) +{ del_set(loop_ana->data); xfree(loop_ana); } + +BE_REGISTER_MODULE_CONSTRUCTOR(be_init_loopana); +void be_init_loopana(void) +{ + FIRM_DBG_REGISTER(dbg, "firm.be.loopana"); +}