X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fopt%2Fifconv.c;h=327465a4a7e2eae927fcbd58b35426b4ae65248b;hb=4cbdab238c1bd78c11cda18f18f8a4ab676e5c56;hp=714d4cf12ba619c56f0aa01b952549c8cf1dcc36;hpb=2436bdde6ade9d056d1dfc4dd5c94e1424fa630f;p=libfirm diff --git a/ir/opt/ifconv.c b/ir/opt/ifconv.c index 714d4cf12..327465a4a 100644 --- a/ir/opt/ifconv.c +++ b/ir/opt/ifconv.c @@ -1,27 +1,12 @@ /* - * 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. - * - * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE - * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE. + * Copyright (C) 2012 University of Karlsruhe. */ -/* - * @file ir/opt/ifconv.c +/** + * @file * @brief If conversion * @author Christoph Mallon - * @version $Id$ */ #include "config.h" @@ -31,7 +16,7 @@ #include "iroptimize.h" #include "obst.h" #include "irnode_t.h" -#include "cdep.h" +#include "cdep_t.h" #include "ircons.h" #include "irgmod.h" #include "irgopt.h" @@ -52,7 +37,7 @@ typedef struct walker_env { bool changed; /**< Set if the graph was changed. */ } walker_env; -DEBUG_ONLY(static firm_dbg_module_t *dbg); +DEBUG_ONLY(static firm_dbg_module_t *dbg;) /** * Returns non-zero if a Block can be emptied. @@ -193,65 +178,60 @@ static void rewire(ir_node* node, int i, int j, ir_node* new_pred) */ static void split_block(ir_node* block, int i, int j) { - ir_node* pred_block = get_nodes_block(get_irn_n(block, i)); - int arity = get_irn_arity(block); - int new_pred_arity; - ir_node *phi, *next; - ir_node **ins; + ir_node *pred_block = get_nodes_block(get_Block_cfgpred(block, i)); + int arity = get_Block_n_cfgpreds(block); + ir_node **ins = ALLOCAN(ir_node*, arity + 1); + int new_pred_arity; + ir_node *phi; + ir_node *next; ir_node **pred_ins; - int k; + int k; DB((dbg, LEVEL_1, "Splitting predecessor %d of predecessor %d of %+F\n", j, i, block)); - NEW_ARR_A(ir_node*, ins, arity + 1); - for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) { ir_node* copy = copy_to(get_irn_n(phi, i), pred_block, j); for (k = 0; k < i; ++k) ins[k] = get_irn_n(phi, k); ins[k++] = copy; for (; k < arity; ++k) ins[k] = get_irn_n(phi, k); - ins[k] = get_irn_n(phi, i); - assert(k == arity); - set_irn_in(phi, arity + 1, ins); + ins[k++] = get_irn_n(phi, i); + set_irn_in(phi, k, ins); } - for (k = 0; k < i; ++k) ins[k] = get_irn_n(block, k); + for (k = 0; k < i; ++k) ins[k] = get_Block_cfgpred(block, k); ins[k++] = get_irn_n(pred_block, j); - for (; k < arity; ++k) ins[k] = get_irn_n(block, k); - ins[k] = get_irn_n(block, i); - assert(k == arity); - set_irn_in(block, arity + 1, ins); + for (; k < arity; ++k) ins[k] = get_Block_cfgpred(block, k); + ins[k++] = get_Block_cfgpred(block, i); + set_irn_in(block, k, ins); new_pred_arity = get_irn_arity(pred_block) - 1; - NEW_ARR_A(ir_node*, pred_ins, new_pred_arity); + pred_ins = ALLOCAN(ir_node*, new_pred_arity); for (phi = get_Block_phis(pred_block); phi != NULL; phi = next) { - for (k = 0; k < j; ++k) pred_ins[k] = get_irn_n(phi, k); - for (; k < new_pred_arity; ++k) pred_ins[k] = get_irn_n(phi, k + 1); - assert(k == new_pred_arity); next = get_Phi_next(phi); - if (new_pred_arity > 1) { - set_irn_in(phi, new_pred_arity, pred_ins); - } else { + for (k = 0; k != j; ++k) pred_ins[k] = get_irn_n(phi, k); + for (; k != new_pred_arity; ++k) pred_ins[k] = get_irn_n(phi, k + 1); + if (k == 1) { exchange(phi, pred_ins[0]); + } else { + set_irn_in(phi, k, pred_ins); } } - for (k = 0; k < j; ++k) pred_ins[k] = get_irn_n(pred_block, k); - for (; k < new_pred_arity; ++k) pred_ins[k] = get_irn_n(pred_block, k + 1); - assert(k == new_pred_arity); - if (new_pred_arity > 1) { - set_irn_in(pred_block, new_pred_arity, pred_ins); - } else { + for (k = 0; k != j; ++k) pred_ins[k] = get_irn_n(pred_block, k); + for (; k != new_pred_arity; ++k) pred_ins[k] = get_irn_n(pred_block, k + 1); + if (k == 1) { exchange(pred_block, get_nodes_block(pred_ins[0])); + } else { + set_irn_in(pred_block, k, pred_ins); } } static void prepare_path(ir_node* block, int i, const ir_node* dependency) { - ir_node* pred = get_nodes_block(get_irn_n(block, i)); + ir_node* pred = get_nodes_block(get_Block_cfgpred(block, i)); int pred_arity; int j; @@ -261,7 +241,7 @@ static void prepare_path(ir_node* block, int i, const ir_node* dependency) for (j = 0; j < pred_arity; ++j) { ir_node* pred_pred = get_nodes_block(get_irn_n(pred, j)); - if (is_cdep_on(pred_pred, dependency)) { + if (pred_pred != dependency && is_cdep_on(pred_pred, dependency)) { prepare_path(pred, j, dependency); split_block(block, i, j); break; @@ -288,23 +268,20 @@ restart: ir_cdep* cdep; pred0 = get_Block_cfgpred_block(block, i); - for (cdep = find_cdep(pred0); cdep != NULL; cdep = cdep->next) { - const ir_node* dependency = cdep->node; + if (pred0 == block) continue; + + for (cdep = find_cdep(pred0); cdep != NULL; cdep = get_cdep_next(cdep)) { + const ir_node* dependency = get_cdep_node(cdep); ir_node* projx0 = walk_to_projx(pred0, dependency); ir_node* cond; int j; - if (dependency == block) continue; - if (projx0 == NULL) continue; cond = get_Proj_pred(projx0); if (! is_Cond(cond)) continue; - /* We only handle boolean decisions, no switches */ - if (get_irn_mode(get_Cond_selector(cond)) != mode_b) continue; - for (j = i + 1; j < arity; ++j) { ir_node* projx1; ir_node* sel; @@ -317,6 +294,7 @@ restart: dbg_info* cond_dbg; pred1 = get_Block_cfgpred_block(block, j); + if (pred1 == block) continue; if (!is_cdep_on(pred1, dependency)) continue; @@ -338,7 +316,11 @@ restart: mux_true = get_Phi_pred(p, i); mux_false = get_Phi_pred(p, j); } - if (!env->allow_ifconv(sel, mux_false, mux_true)) { + if (mux_true == mux_false) + continue; + ir_mode *mode = get_irn_mode(mux_true); + if (mode == mode_M + || !env->allow_ifconv(sel, mux_false, mux_true)) { supported = false; break; } @@ -350,6 +332,7 @@ restart: cond, projx0, projx1 )); + /* remove critical edges */ env->changed = true; prepare_path(block, i, dependency); prepare_path(block, j, dependency); @@ -357,7 +340,7 @@ restart: mux_block = get_nodes_block(cond); cond_dbg = get_irn_dbg_info(cond); - do { + do { /* generate Mux nodes in mux_block for Phis in block */ ir_node* val_i = get_irn_n(phi, i); ir_node* val_j = get_irn_n(phi, j); ir_node* mux; @@ -395,29 +378,17 @@ restart: phi = next_phi; } while (phi != NULL); - exchange(get_nodes_block(get_irn_n(block, i)), mux_block); - exchange(get_nodes_block(get_irn_n(block, j)), mux_block); + /* move mux operands into mux_block */ + exchange(get_nodes_block(get_Block_cfgpred(block, i)), mux_block); + exchange(get_nodes_block(get_Block_cfgpred(block, j)), mux_block); if (arity == 2) { unsigned mark; -#if 1 - DB((dbg, LEVEL_1, "Welding block %+F and %+F\n", block, mux_block)); - /* copy the block-info from the Mux-block to the block before merging */ - - mark = get_Block_mark(mux_block) | get_Block_mark(block); - set_Block_mark(block, mark); - set_Block_phis(block, get_Block_phis(mux_block)); - - set_irn_in(block, get_irn_arity(mux_block), get_irn_in(mux_block) + 1); - exchange_cdep(mux_block, block); - exchange(mux_block, block); -#else DB((dbg, LEVEL_1, "Welding block %+F to %+F\n", block, mux_block)); mark = get_Block_mark(mux_block) | get_Block_mark(block); /* mark both block just to be sure, should be enough to mark mux_block */ set_Block_mark(mux_block, mark); exchange(block, mux_block); -#endif return; } else { rewire(block, i, j, new_r_Jmp(mux_block)); @@ -471,6 +442,12 @@ void opt_if_conv(ir_graph *irg) walker_env env; const backend_params *be_params = be_get_backend_param(); + assure_irg_properties(irg, + IR_GRAPH_PROPERTY_NO_CRITICAL_EDGES + | IR_GRAPH_PROPERTY_NO_UNREACHABLE_CODE + | IR_GRAPH_PROPERTY_NO_BADS + | IR_GRAPH_PROPERTY_ONE_RETURN); + /* get the parameters */ env.allow_ifconv = be_params->allow_ifconv; env.changed = false; @@ -479,9 +456,6 @@ void opt_if_conv(ir_graph *irg) DB((dbg, LEVEL_1, "Running if-conversion on %+F\n", irg)); - normalize_one_return(irg); - remove_critical_cf_edges(irg); - compute_cdep(irg); ir_reserve_resources(irg, IR_RESOURCE_BLOCK_MARK | IR_RESOURCE_PHI_LIST); @@ -494,15 +468,13 @@ void opt_if_conv(ir_graph *irg) if (env.changed) { local_optimize_graph(irg); - - /* graph has changed, invalidate analysis info */ - set_irg_outs_inconsistent(irg); - set_irg_extblk_inconsistent(irg); - set_irg_loopinfo_inconsistent(irg); - set_irg_doms_inconsistent(irg); } free_cdep(irg); + + confirm_irg_properties(irg, + IR_GRAPH_PROPERTY_NO_CRITICAL_EDGES + | IR_GRAPH_PROPERTY_ONE_RETURN); } ir_graph_pass_t *opt_if_conv_pass(const char *name)