X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbeloopana.c;h=76e0a63d1cd3a291d212e7fd7aad1894ff7df49b;hb=64723d1bd8ace74ca5f0018db8655f2a1f443532;hp=9acc15652f318f77775ada0a1a486cea23a9d5ff;hpb=863d31d7a5c8210432fef88b30fc3e8353131538;p=libfirm diff --git a/ir/be/beloopana.c b/ir/be/beloopana.c index 9acc15652..76e0a63d1 100644 --- a/ir/be/beloopana.c +++ b/ir/be/beloopana.c @@ -1,15 +1,30 @@ -/** - * 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" @@ -17,6 +32,7 @@ #include "irtools.h" #include "irloop_t.h" #include "error.h" +#include "debug.h" #include "bearch.h" #include "belive.h" @@ -39,31 +55,35 @@ struct _be_loopana_t { be_irg_t *birg; }; -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; @@ -71,14 +91,14 @@ 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); } DBG((dbg, LEVEL_1, "Finished with Block %+F (%s %u)\n", block, cls->name, max_live)); - del_pset(live_nodes); + ir_nodeset_destroy(&live_nodes); return max_live; } @@ -103,20 +123,15 @@ static unsigned be_compute_loop_pressure(be_loopana_t *loop_ana, ir_loop *loop, unsigned son_pressure; loop_element elem = get_loop_element(loop, i); - switch (*elem.kind) { - case k_ir_node: - son_pressure = be_compute_block_pressure(loop_ana, elem.node, cls); - break; - case k_ir_loop: - son_pressure = be_compute_loop_pressure(loop_ana, elem.son, cls); - break; - default: - panic("Unknown element found in loop"); - 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); } 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 */ @@ -135,8 +150,10 @@ 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; @@ -145,7 +162,12 @@ be_loopana_t *be_new_loop_pressure_cls(be_irg_t *birg, const arch_register_class 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, get_irg_loop(birg->irg), cls); + /* 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; } @@ -155,20 +177,33 @@ 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; - 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); - 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); + } + + 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; @@ -191,7 +226,7 @@ unsigned be_get_loop_pressure(be_loopana_t *loop_ana, const arch_register_class_ 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; }