X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbeuses.c;h=71cfe52b7c3987a395ee302edd0a2c8fae2f3435;hb=554dbf627a86307df50a784e5476d929c36882e8;hp=7a0f6d984dbc8131aef43a61dde3e1d92892344d;hpb=423c859509f75769c66d1509110d7c678c6158d4;p=libfirm diff --git a/ir/be/beuses.c b/ir/be/beuses.c index 7a0f6d984..71cfe52b7 100644 --- a/ir/be/beuses.c +++ b/ir/be/beuses.c @@ -1,16 +1,30 @@ -/** - * @file beuse.c - * @date 27.06.2005 - * @author Sebastian Hack, Matthias Braun +/* + * 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. * - * Methods to compute when a value will be used again. + * Licensees holding valid libFirm Professional Edition licenses may use + * this file in accordance with the libFirm Commercial License. + * Agreement provided with the Software. * - * Copyright (C) 2005 Universitaet Karlsruhe - * Released under the GPL + * 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 Methods to compute when a value will be used again. + * @author Sebastian Hack, Matthias Braun + * @date 27.06.2005 + * @version $Id$ */ -#ifdef HAVE_CONFIG_H #include "config.h" -#endif #include #include @@ -30,12 +44,11 @@ #include "be_t.h" #include "beutil.h" #include "belive_t.h" -#include "benode_t.h" -#include "besched_t.h" +#include "benode.h" +#include "besched.h" #include "beirgmod.h" #include "bearch.h" -#include "beuses_t.h" -#include "benodesets.h" +#include "beuses.h" #define SCAN_INTERBLOCK_USES @@ -59,6 +72,8 @@ static int cmp_use(const void *a, const void *b, size_t n) { const be_use_t *p = a; const be_use_t *q = b; + (void) n; + return !(p->block == q->block && p->node == q->node); } @@ -70,7 +85,7 @@ static const be_use_t *get_or_set_use_block(be_uses_t *env, const ir_node *block, const ir_node *def) { - unsigned hash = HASH_COMBINE(nodeset_hash(block), nodeset_hash(def)); + unsigned hash = HASH_COMBINE(hash_irn(block), hash_irn(def)); be_use_t temp; be_use_t* result; @@ -102,17 +117,19 @@ static const be_use_t *get_or_set_use_block(be_uses_t *env, return result; } -static int be_is_phi_argument(const be_lv_t *lv, const ir_node *block, const ir_node *def) +static int be_is_phi_argument(const ir_node *block, const ir_node *def) { ir_node *node; ir_node *succ_block = NULL; const ir_edge_t *edge; int arity, i; -#if 0 - if(get_irn_n_edges_kind(block, EDGE_KIND_BLOCK) > 1) - return 0; +#if 1 + if (get_irn_n_edges_kind(block, EDGE_KIND_BLOCK) < 1) +#else + if (get_irn_n_edges_kind(block, EDGE_KIND_BLOCK) != 1) #endif + return 0; foreach_block_succ(block, edge) { succ_block = get_edge_src_irn(edge); @@ -143,18 +160,68 @@ static int be_is_phi_argument(const be_lv_t *lv, const ir_node *block, const ir_ return 0; } +static inline +unsigned get_step(const ir_node *node) +{ + return PTR_TO_INT(get_irn_link(node)); +} + static be_next_use_t get_next_use(be_uses_t *env, ir_node *from, unsigned from_step, const ir_node *def, int skip_from_uses) { - unsigned step = from_step; - ir_node *block = get_nodes_block(from); - ir_node *node; + unsigned step = from_step; + ir_node *block = get_nodes_block(from); + ir_node *next_use; + ir_node *node; + unsigned timestep; + unsigned next_use_step; const ir_edge_t *edge; +#if 1 + assert(skip_from_uses == 0 || skip_from_uses == 1); + if(skip_from_uses) { + from = sched_next(from); + } + + next_use = NULL; + next_use_step = INT_MAX; + timestep = get_step(from); + foreach_out_edge(def, edge) { + ir_node *node = get_edge_src_irn(edge); + unsigned node_step; + + if(is_Anchor(node)) + continue; + if(get_nodes_block(node) != block) + continue; + if(is_Phi(node)) + continue; + + node_step = get_step(node); + if(node_step < timestep) + continue; + if(node_step < next_use_step) { + next_use = node; + next_use_step = node_step; + } + } + + if(next_use != NULL) { + be_next_use_t result; + result.time = next_use_step - timestep + skip_from_uses; + result.outermost_loop = get_loop_depth(get_irn_loop(block)); + result.before = next_use; + return result; + } + + node = sched_last(block); + step = get_step(node) + 1 + timestep + skip_from_uses; + +#else if(skip_from_uses) { - step++; from = sched_next(from); + ++step; } sched_foreach_from(from, node) { @@ -170,55 +237,60 @@ static be_next_use_t get_next_use(be_uses_t *env, ir_node *from, const ir_node *operand = get_irn_n(node, i); if (operand == def) { + be_next_use_t result; + DBG((env->dbg, LEVEL_3, "found use of %+F at %+F\n", operand, node)); /** * Spills/Reloads are a special case, they're not really a * usage of a value, continue searching */ - if(be_is_Spill(node) || be_is_Reload(node)) { + if (be_is_Spill(node) || be_is_Reload(node)) { return be_get_next_use(env, node, step, node, 1); } - be_next_use_t result; - result.time = step; + result.time = step; result.outermost_loop = get_loop_depth(get_irn_loop(block)); + result.before = node; return result; } } step++; } +#endif - if(be_is_phi_argument(env->lv, block, def)) { + if(be_is_phi_argument(block, def)) { // TODO we really should continue searching the uses of the phi, // as a phi isn't a real use that implies a reload (because we could // easily spill the whole phi) be_next_use_t result; - result.time = step; + result.time = step; result.outermost_loop = get_loop_depth(get_irn_loop(block)); + result.before = block; return result; } #ifdef SCAN_INTERBLOCK_USES { - unsigned next_use = USES_INFINITY; + unsigned next_use = USES_INFINITY; int outermost_loop; be_next_use_t result; - ir_loop *loop = get_irn_loop(block); - int loopdepth = get_loop_depth(loop); - int found_visited = 0; - int found_use = 0; - ir_graph *irg = get_irn_irg(block); + ir_loop *loop = get_irn_loop(block); + int loopdepth = get_loop_depth(loop); + int found_visited = 0; + int found_use = 0; + ir_graph *irg = get_irn_irg(block); ir_node *startblock = get_irg_start_block(irg); + result.before = NULL; outermost_loop = loopdepth; foreach_block_succ(block, edge) { const be_use_t *use; const ir_node *succ_block = get_edge_src_irn(edge); ir_loop *succ_loop; - int use_dist; + unsigned use_dist; if(succ_block == startblock) continue; @@ -245,22 +317,23 @@ static be_next_use_t get_next_use(be_uses_t *env, ir_node *from, succ_loop = get_irn_loop(succ_block); if(get_loop_depth(succ_loop) < loopdepth) { - int factor = (loopdepth - get_loop_depth(succ_loop)) * 5000; + unsigned factor = (loopdepth - get_loop_depth(succ_loop)) * 5000; DBG((env->dbg, LEVEL_5, "Increase usestep because of loop out edge %d -> %d (%u)\n", factor)); // TODO we should use the number of nodes in the loop or so... use_dist += factor; } if(use_dist < next_use) { - next_use = use_dist; + next_use = use_dist; outermost_loop = use->outermost_loop; + result.before = use->node; } } if(loopdepth < outermost_loop) outermost_loop = loopdepth; - result.time = next_use + step; + result.time = next_use + step; result.outermost_loop = outermost_loop; if(!found_use && found_visited) { @@ -284,12 +357,32 @@ be_next_use_t be_get_next_use(be_uses_t *env, ir_node *from, return get_next_use(env, from, from_step, def, skip_from_uses); } +static +void set_sched_step_walker(ir_node *block, void *data) +{ + ir_node *node; + unsigned step = 0; + (void) data; + + sched_foreach(block, node) { + set_irn_link(node, INT_TO_PTR(step)); + if(is_Phi(node)) + continue; + ++step; + } +} + be_uses_t *be_begin_uses(ir_graph *irg, const be_lv_t *lv) { - be_uses_t *env = xmalloc(sizeof(env[0])); + be_uses_t *env = XMALLOC(be_uses_t); edges_assure(irg); + //set_using_irn_link(irg); + + /* precalculate sched steps */ + irg_block_walk_graph(irg, set_sched_step_walker, NULL, NULL); + env->uses = new_set(cmp_use, 512); env->irg = irg; env->lv = lv; @@ -301,6 +394,7 @@ be_uses_t *be_begin_uses(ir_graph *irg, const be_lv_t *lv) void be_end_uses(be_uses_t *env) { + //clear_using_irn_link(env->irg); del_set(env->uses); free(env); }