X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firgwalk.c;h=d6b3a7147646e3c6298facd5c4e3da66fd025519;hb=3db23eee84cbabb3f399f1ca820948114a9c837c;hp=afa850d47ab616699ebd7e71946d4b64b541867d;hpb=70a99776fa03fa4f45379d06e1fae21c2ca103b3;p=libfirm diff --git a/ir/ir/irgwalk.c b/ir/ir/irgwalk.c index afa850d47..d6b3a7147 100644 --- a/ir/ir/irgwalk.c +++ b/ir/ir/irgwalk.c @@ -1,540 +1,447 @@ /* - * Project: libFIRM - * File name: ir/ir/irgwalk.c - * Purpose: - * Author: Boris Boesler - * Modified by: Goetz Lindenmaier - * Created: - * CVS-ID: $Id$ - * Copyright: (c) 1999-2003 Universität Karlsruhe - * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE. + * Copyright (C) 1995-2011 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. */ /** - * @file irgwalk.c - * - * traverse an ir graph - * - execute the pre function before recursion - * - execute the post function after recursion + * @file + * @brief Functions for traversing ir graphs + * @author Boris Boesler, Goetz Lindenmaier, Michael Beck + * @brief + * traverse an ir graph + * - execute the pre function before recursion + * - execute the post function after recursion */ +#include "config.h" - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif - -#ifdef HAVE_STDLIB_H -# include -#endif +#include #include "irnode_t.h" -#include "irgraph_t.h" /* visited flag */ +#include "irgraph_t.h" #include "irprog.h" #include "irgwalk.h" -#include "typewalk.h" -#include "firmstat.h" -#include "ircgcons.h" +#include "irhooks.h" +#include "entity_t.h" +#include "ircons.h" -#include "eset.h" +#include "error.h" +#include "pset_new.h" #include "array.h" -/** - * Walk over an interprocedural graph (callgraph). - * Visits only graphs in irg_set. - */ -static void irg_walk_cg(ir_node * node, unsigned long visited, eset * irg_set, - irg_walk_func *pre, irg_walk_func *post, void * env) { - int i; - ir_graph * rem = current_ir_graph; - ir_node * pred; - - assert(node && node->kind == k_ir_node); - if (get_irn_visited(node) >= visited) return; - - set_irn_visited(node, visited); - - if (pre) pre(node, env); - - pred = skip_Proj(node); - if (get_irn_op(pred) == op_CallBegin - || get_irn_op(pred) == op_EndReg - || get_irn_op(pred) == op_EndExcept) { - current_ir_graph = get_irn_irg(pred); - } - - if (is_no_Block(node)) { /* not block */ - irg_walk_cg(get_nodes_block(node), visited, irg_set, pre, post, env); - } - - if (get_irn_op(node) == op_Block) { /* block */ - for (i = get_irn_arity(node) - 1; i >= 0; --i) { - ir_node * exec = get_irn_n(node, i); - ir_node * pred = skip_Proj(exec); - if ((get_irn_op(pred) != op_CallBegin - && get_irn_op(pred) != op_EndReg - && get_irn_op(pred) != op_EndExcept) - || eset_contains(irg_set, get_irn_irg(pred))) { - irg_walk_cg(exec, visited, irg_set, pre, post, env); - } - } - } else if (get_irn_op(node) == op_Filter) { /* filter */ - for (i = get_irn_arity(node) - 1; i >= 0; --i) { - ir_node * pred = get_irn_n(node, i); - if (get_irn_op(pred) == op_Unknown || get_irn_op(pred) == op_Bad) { - irg_walk_cg(pred, visited, irg_set, pre, post, env); - } else { - ir_node * exec; - exec = skip_Proj(get_Block_cfgpred(get_nodes_block(node), i)); - - if (op_Bad == get_irn_op (exec)) { - continue; - } - - assert(get_irn_op(exec) == op_CallBegin - || get_irn_op(exec) == op_EndReg - || get_irn_op(exec) == op_EndExcept); - if (eset_contains(irg_set, get_irn_irg(exec))) { - current_ir_graph = get_irn_irg(exec); - irg_walk_cg(pred, visited, irg_set, pre, post, env); - current_ir_graph = rem; - } - } - } - } else { /* everything else */ - for (i = get_irn_arity(node) - 1; i >= 0; --i) { - irg_walk_cg(get_irn_n(node, i), visited, irg_set, pre, post, env); - } - } - - if (post) post(node, env); - - current_ir_graph = rem; -} - - -/** - * Insert all ir_graphs in irg_set, that are (transitive) reachable. - */ -static void collect_irgs(ir_node * node, eset * irg_set) { - if (get_irn_op(node) == op_Call) { - int i; - for (i = get_Call_n_callees(node) - 1; i >= 0; --i) { - entity * ent = get_Call_callee(node, i); - ir_graph * irg = get_entity_irg(ent); - if (irg && !eset_contains(irg_set, irg)) { - eset_insert(irg_set, irg); - irg_walk_graph(irg, (irg_walk_func *) collect_irgs, NULL, irg_set); - } - } - } -} - /** * specialized version of irg_walk_2, called if only pre callback exists */ -static void -irg_walk_2_pre(ir_node *node, irg_walk_func *pre, void * env) { - int i; - set_irn_visited(node, current_ir_graph->visited); - - pre(node, env); - - if (node->op != op_Block) { - ir_node *pred = get_irn_n(node, -1); - if (pred->visited < current_ir_graph->visited) - irg_walk_2_pre(pred, pre, env); - } - for (i = get_irn_arity(node) - 1; i >= 0; --i) { - ir_node *pred = get_irn_n(node, i); - if (pred->visited < current_ir_graph->visited) - irg_walk_2_pre(pred, pre, env); - } +static void irg_walk_2_pre(ir_node *node, irg_walk_func *pre, void *env) +{ + int i; + ir_graph *irg = get_irn_irg(node); + + set_irn_visited(node, irg->visited); + + pre(node, env); + + if (!is_Block(node)) { + ir_node *pred = get_nodes_block(node); + if (pred->visited < irg->visited) + irg_walk_2_pre(pred, pre, env); + } + for (i = get_irn_arity(node) - 1; i >= 0; --i) { + ir_node *pred = get_irn_n(node, i); + if (pred->visited < irg->visited) + irg_walk_2_pre(pred, pre, env); + } } /** * specialized version of irg_walk_2, called if only post callback exists */ -static void -irg_walk_2_post(ir_node *node, irg_walk_func *post, void * env) { - int i; - set_irn_visited(node, current_ir_graph->visited); - - if (node->op != op_Block) { - ir_node *pred = get_irn_n(node, -1); - if (pred->visited < current_ir_graph->visited) - irg_walk_2_post(pred, post, env); - } - for (i = get_irn_arity(node) - 1; i >= 0; --i) { - ir_node *pred = get_irn_n(node, i); - if (pred->visited < current_ir_graph->visited) - irg_walk_2_post(pred, post, env); - } - - post(node, env); +static void irg_walk_2_post(ir_node *node, irg_walk_func *post, void *env) +{ + int i; + ir_graph *irg = get_irn_irg(node); + + set_irn_visited(node, irg->visited); + + if (!is_Block(node)) { + ir_node *pred = get_nodes_block(node); + if (pred->visited < irg->visited) + irg_walk_2_post(pred, post, env); + } + for (i = get_irn_arity(node) - 1; i >= 0; --i) { + ir_node *pred = get_irn_n(node, i); + if (pred->visited < irg->visited) + irg_walk_2_post(pred, post, env); + } + + post(node, env); } /** * specialized version of irg_walk_2, called if pre and post callbacks exist */ -static void -irg_walk_2_both(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void * env) { - int i; - set_irn_visited(node, current_ir_graph->visited); - - pre(node, env); - - if (node->op != op_Block) { - ir_node *pred = get_irn_n(node, -1); - if (pred->visited < current_ir_graph->visited) - irg_walk_2_both(pred, pre, post, env); - } - for (i = get_irn_arity(node) - 1; i >= 0; --i) { - ir_node *pred = get_irn_n(node, i); - if (pred->visited < current_ir_graph->visited) - irg_walk_2_both(pred, pre, post, env); - } - - post(node, env); -} - -/** - * Intraprozedural graph walker. - */ -static void -irg_walk_2(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void * env) +static void irg_walk_2_both(ir_node *node, irg_walk_func *pre, + irg_walk_func *post, void *env) { - if (node->visited < current_ir_graph->visited) { - if (!post) irg_walk_2_pre (node, pre, env); - else if (!pre) irg_walk_2_post(node, post, env); - else irg_walk_2_both(node, pre, post, env); - } -} + int i; + ir_graph *irg = get_irn_irg(node); -/* - * generic graph walker - */ -void irg_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void *env) -{ - assert(node && node->kind==k_ir_node); - - if (get_interprocedural_view()) { - eset * irg_set = eset_create(); - unsigned long visited; - ir_graph * irg; - assert(get_irp_ip_view_state() == ip_view_valid); - - set_interprocedural_view(false); - eset_insert(irg_set, current_ir_graph); - irg_walk(node, (irg_walk_func *) collect_irgs, NULL, irg_set); - set_interprocedural_view(true); - visited = get_max_irg_visited() + 1; - for (irg = eset_first(irg_set); irg; irg = eset_next(irg_set)) { - set_irg_visited(irg, visited); - } - irg_walk_cg(node, visited, irg_set, pre, post, env); - eset_destroy(irg_set); - } else { - inc_irg_visited(current_ir_graph); - irg_walk_2(node, pre, post, env); - } - return; -} + set_irn_visited(node, irg->visited); -/* - * walk over a graph - */ -void irg_walk_graph(ir_graph *irg, irg_walk_func *pre, irg_walk_func *post, void *env) { - ir_graph * rem = current_ir_graph; + pre(node, env); - stat_irg_walk(irg, (void *)pre, (void *)post); - current_ir_graph = irg; - irg_walk(get_irg_end(irg), pre, post, env); - current_ir_graph = rem; -} + if (!is_Block(node)) { + ir_node *pred = get_nodes_block(node); + if (pred->visited < irg->visited) + irg_walk_2_both(pred, pre, post, env); + } + for (i = get_irn_arity(node) - 1; i >= 0; --i) { + ir_node *pred = get_irn_n(node, i); + if (pred->visited < irg->visited) + irg_walk_2_both(pred, pre, post, env); + } -/* Executes irg_walk(end, pre, post, env) for all irgraphs in irprog. - Sets current_ir_graph properly for each walk. Conserves current - current_ir_graph. */ -void all_irg_walk(irg_walk_func *pre, irg_walk_func *post, void *env) { - int i; - ir_graph *irg, *rem; - - rem = current_ir_graph; - - for (i = 0; i < get_irp_n_irgs(); i++) { - irg = get_irp_irg(i); - current_ir_graph = irg; - irg_walk(get_irg_end(irg), pre, post, env); - } - current_ir_graph = rem; + post(node, env); } -/***************************************************************************/ - -/* Returns current_ir_graph and sets it to the irg of predecessor index - of node n. */ -static INLINE ir_graph * -switch_irg (ir_node *n, int index) { - ir_graph *old_current = current_ir_graph; - - if (get_interprocedural_view()) { - /* Only Filter and Block nodes can have predecessors in other graphs. */ - if (get_irn_op(n) == op_Filter) - n = get_nodes_block(n); - if (get_irn_op(n) == op_Block) { - ir_node *cfop = skip_Proj(get_Block_cfgpred(n, index)); - if (is_ip_cfop(cfop)) { - current_ir_graph = get_irn_irg(cfop); - } - } - } +void irg_walk_2(ir_node *node, irg_walk_func *pre, irg_walk_func *post, + void *env) +{ + if (irn_visited(node)) + return; - return old_current; + if (!post) irg_walk_2_pre (node, pre, env); + else if (!pre) irg_walk_2_post(node, post, env); + else irg_walk_2_both(node, pre, post, env); } -static void -cg_walk_2(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void * env) +void irg_walk_core(ir_node *node, irg_walk_func *pre, irg_walk_func *post, + void *env) { - int i; - ir_graph *rem = NULL; - assert(node); - - if (get_irn_visited(node) < get_irg_visited(current_ir_graph)) { - set_irn_visited(node, get_irg_visited(current_ir_graph)); - - if (pre) pre(node, env); - - if (is_no_Block(node)) - cg_walk_2(get_nodes_block(node), pre, post, env); - for (i = get_irn_arity(node) - 1; i >= 0; --i) { - rem = switch_irg(node, i); /* @@@ AS: Is this wrong? We do have to - switch to the irg of the predecessor, don't we? */ - cg_walk_2(get_irn_n(node, i), pre, post, env); - current_ir_graph = rem; - } + assert(is_ir_node(node)); + irg_walk_2(node, pre, post, env); +} - if (post) post(node, env); - } - return; +void irg_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post, + void *env) +{ + ir_graph *irg = get_irn_irg(node); + ir_graph *rem = current_ir_graph; + + current_ir_graph = irg; + ir_reserve_resources(irg, IR_RESOURCE_IRN_VISITED); + inc_irg_visited(irg); + irg_walk_core(node, pre, post, env); + ir_free_resources(irg, IR_RESOURCE_IRN_VISITED); + current_ir_graph = rem; } +void irg_walk_graph(ir_graph *irg, irg_walk_func *pre, irg_walk_func *post, void *env) +{ + ir_graph * rem = current_ir_graph; -/* Walks all irgs in interprocedural view. Visits each node only once. */ -void cg_walk(irg_walk_func *pre, irg_walk_func *post, void *env) { - int i; - ir_graph *rem = current_ir_graph; - int rem_view = get_interprocedural_view(); + hook_irg_walk(irg, (generic_func *)pre, (generic_func *)post); + current_ir_graph = irg; + irg_walk(get_irg_end(irg), pre, post, env); + current_ir_graph = rem; +} - set_interprocedural_view(true); +void all_irg_walk(irg_walk_func *pre, irg_walk_func *post, void *env) +{ + size_t i, n; + ir_graph *irg; - inc_max_irg_visited(); - /* Fix all irg_visited flags */ - for (i = 0; i < get_irp_n_irgs(); i++) - set_irg_visited(get_irp_irg(i), get_max_irg_visited()); + for (i = 0, n = get_irp_n_irgs(); i < n; i++) { + irg = get_irp_irg(i); + irg_walk_graph(irg, pre, post, env); + } +} - /* Walk starting at unreachable procedures. Only these - * have End blocks visible in interprocedural view. */ - for (i = 0; i < get_irp_n_irgs(); i++) { - ir_node *sb; - current_ir_graph = get_irp_irg(i); +/** + * specialized version of irg_walk_in_or_dep_2, called if only pre callback exists + */ +static void irg_walk_in_or_dep_2_pre(ir_node *node, irg_walk_func *pre, void *env) +{ + int i; + ir_graph *irg = get_irn_irg(node); + + set_irn_visited(node, irg->visited); + + pre(node, env); + + if (!is_Block(node)) { + ir_node *pred = get_nodes_block(node); + if (pred->visited < irg->visited) + irg_walk_in_or_dep_2_pre(pred, pre, env); + } + for (i = get_irn_ins_or_deps(node) - 1; i >= 0; --i) { + ir_node *pred = get_irn_in_or_dep(node, i); + if (pred->visited < irg->visited) + irg_walk_in_or_dep_2_pre(pred, pre, env); + } +} - sb = get_irg_start_block(current_ir_graph); +/** + * specialized version of irg_walk_in_or_dep_2, called if only post callback exists + */ +static void irg_walk_in_or_dep_2_post(ir_node *node, irg_walk_func *post, void *env) +{ + int i; + ir_graph *irg = get_irn_irg(node); + + set_irn_visited(node, irg->visited); + + if (!is_Block(node)) { + ir_node *pred = get_nodes_block(node); + if (pred->visited < irg->visited) + irg_walk_in_or_dep_2_post(pred, post, env); + } + for (i = get_irn_ins_or_deps(node) - 1; i >= 0; --i) { + ir_node *pred = get_irn_in_or_dep(node, i); + if (pred->visited < irg->visited) + irg_walk_in_or_dep_2_post(pred, post, env); + } + + post(node, env); +} - if ((get_Block_n_cfgpreds(sb) > 1) || - (get_nodes_block(get_Block_cfgpred(sb, 0)) != sb)) continue; +/** + * specialized version of irg_walk_in_or_dep_2, called if pre and post callbacks exist + */ +static void irg_walk_in_or_dep_2_both(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void *env) +{ + int i; + ir_graph *irg = get_irn_irg(node); - cg_walk_2(get_irg_end(current_ir_graph), pre, post, env); - } + set_irn_visited(node, irg->visited); - /* Check whether we walked all procedures: there could be procedures - with cyclic calls but no call from the outside. */ - for (i = 0; i < get_irp_n_irgs(); i++) { - ir_node *sb; - current_ir_graph = get_irp_irg(i); + pre(node, env); - /* Test start block: if inner procedure end and end block are not - * visible and therefore not marked. */ - sb = get_irg_start_block(current_ir_graph); - if (get_irn_visited(sb) < get_irg_visited(current_ir_graph)) { - cg_walk_2(sb, pre, post, env); - } - } - - /* Walk all endless loops in inner procedures. - * We recognize an inner procedure if the End node is not visited. */ - for (i = 0; i < get_irp_n_irgs(); i++) { - ir_node *e; - current_ir_graph = get_irp_irg(i); - e = get_irg_end(current_ir_graph); - if (get_irn_visited(e) < get_irg_visited(current_ir_graph)) { - int j; - /* Don't visit the End node. */ - for (j = 0; j < get_End_n_keepalives(e); j++) - cg_walk_2(get_End_keepalive(e, j), pre, post, env); - } - } + if (!is_Block(node)) { + ir_node *pred = get_nodes_block(node); + if (pred->visited < irg->visited) + irg_walk_in_or_dep_2_both(pred, pre, post, env); + } + for (i = get_irn_ins_or_deps(node) - 1; i >= 0; --i) { + ir_node *pred = get_irn_in_or_dep(node, i); + if (pred->visited < irg->visited) + irg_walk_in_or_dep_2_both(pred, pre, post, env); + } - set_interprocedural_view(rem_view); - current_ir_graph = rem; + post(node, env); } +/** + * Intraprozedural graph walker. Follows dependency edges as well. + */ +static void irg_walk_in_or_dep_2(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void *env) +{ + if (irn_visited(node)) + return; -/***************************************************************************/ - -/* Walks back from n until it finds a real cf op. */ -static ir_node *get_cf_op(ir_node *n) { - ir_node *pred; + if (! post) irg_walk_in_or_dep_2_pre (node, pre, env); + else if (! pre) irg_walk_in_or_dep_2_post(node, post, env); + else irg_walk_in_or_dep_2_both(node, pre, post, env); +} - n = skip_Id(n); - n = skip_Tuple(n); - pred = skip_Proj(n); - if (!(is_cfop(pred) || is_fragile_op(pred) || - (get_irn_op(pred) == op_Bad))) - n = get_cf_op(n); +void irg_walk_in_or_dep(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void *env) +{ + assert(is_ir_node(node)); - return skip_Proj(n); + ir_reserve_resources(current_ir_graph, IR_RESOURCE_IRN_VISITED); + inc_irg_visited(current_ir_graph); + irg_walk_in_or_dep_2(node, pre, post, env); + ir_free_resources(current_ir_graph, IR_RESOURCE_IRN_VISITED); } -static void irg_block_walk_2(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void *env) +void irg_walk_in_or_dep_graph(ir_graph *irg, irg_walk_func *pre, irg_walk_func *post, void *env) { - int i; - - if(get_Block_block_visited(node) < get_irg_block_visited(current_ir_graph)) { - set_Block_block_visited(node, get_irg_block_visited(current_ir_graph)); - - if(pre) pre(node, env); - - for(i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) { - /* find the corresponding predecessor block. */ - ir_node *pred = get_cf_op(get_Block_cfgpred(node, i)); - pred = get_nodes_block(pred); - if(get_irn_opcode(pred) == iro_Block) { - /* recursion */ - irg_block_walk_2(pred, pre, post, env); - } - else { - assert(get_irn_opcode(pred) == iro_Bad); - } - } + ir_graph * rem = current_ir_graph; - if(post) post(node, env); - } - return; + hook_irg_walk(irg, (generic_func *)pre, (generic_func *)post); + current_ir_graph = irg; + irg_walk_in_or_dep(get_irg_end(irg), pre, post, env); + current_ir_graph = rem; } +/* Walks back from n until it finds a real cf op. */ +static ir_node *get_cf_op(ir_node *n) +{ + while (!is_cfop(n) && !is_fragile_op(n) && !is_Bad(n)) { + n = skip_Tuple(n); + n = skip_Proj(n); + } + return n; +} -/* walks only over Block nodes in the graph. Has it's own visited - flag, so that it can be interleaved with the other walker. */ -void irg_block_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void *env) +static void irg_block_walk_2(ir_node *node, irg_walk_func *pre, + irg_walk_func *post, void *env) { - ir_node *block, *pred; - int i; - - stat_irg_block_walk(current_ir_graph, node, (void *)pre, (void *)post); - - assert(node); - assert(!get_interprocedural_view()); /* interprocedural_view not implemented, because it - * interleaves with irg_walk */ - inc_irg_block_visited(current_ir_graph); - if (is_no_Block(node)) block = get_nodes_block(node); else block = node; - assert(get_irn_opcode(block) == iro_Block); - irg_block_walk_2(block, pre, post, env); - - /* keepalive: the endless loops ... */ - if (get_irn_op(node) == op_End) { - int arity = get_irn_arity(node); - for (i = 0; i < arity; i++) { - pred = get_irn_n(node, i); - if (get_irn_op(pred) == op_Block) - irg_block_walk_2(pred, pre, post, env); - } - /* Sometimes the blocks died, but are still reachable through Phis. - * Make sure the algorithms that try to remove these reach them. */ - for (i = 0; i < arity; i++) { - pred = get_irn_n(node, i); - if (get_irn_op(pred) == op_Phi) { - ir_node *block = get_nodes_block(pred); - - if (! is_Bad(block)) - irg_block_walk_2(block, pre, post, env); - } - } - } + int i; + + if (Block_block_visited(node)) + return; + mark_Block_block_visited(node); + + if (pre) + pre(node, env); + + for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) { + /* find the corresponding predecessor block. */ + ir_node *pred = get_cf_op(get_Block_cfgpred(node, i)); + pred = get_nodes_block(pred); + if (get_irn_opcode(pred) == iro_Block) { + /* recursion */ + irg_block_walk_2(pred, pre, post, env); + } else { + assert(get_irn_opcode(pred) == iro_Bad); + } + } + + if (post) + post(node, env); +} - return; +void irg_block_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post, + void *env) +{ + ir_graph *irg = get_irn_irg(node); + ir_node *block = is_Block(node) ? node : get_nodes_block(node); + + hook_irg_block_walk(irg, node, (generic_func *)pre, (generic_func *)post); + + ir_reserve_resources(irg, IR_RESOURCE_BLOCK_VISITED); + inc_irg_block_visited(irg); + irg_block_walk_2(block, pre, post, env); + + /* Some blocks might be only reachable through keep-alive edges */ + if (is_End(node)) { + int arity = get_irn_arity(node); + int i; + for (i = 0; i < arity; i++) { + ir_node *pred = get_irn_n(node, i); + if (!is_Block(pred)) + continue; + irg_block_walk_2(pred, pre, post, env); + } + } + + ir_free_resources(irg, IR_RESOURCE_BLOCK_VISITED); } -/* - * walk over a graph block wise - */ void irg_block_walk_graph(ir_graph *irg, irg_walk_func *pre, - irg_walk_func *post, void *env) { - ir_graph * rem = current_ir_graph; - current_ir_graph = irg; - irg_block_walk(get_irg_end(irg), pre, post, env); - current_ir_graph = rem; + irg_walk_func *post, void *env) +{ + ir_graph * rem = current_ir_graph; + current_ir_graph = irg; + irg_block_walk(get_irg_end(irg), pre, post, env); + current_ir_graph = rem; } -/********************************************************************/ +void irg_walk_anchors(ir_graph *irg, irg_walk_func *pre, irg_walk_func *post, void *env) +{ + ir_graph * rem = current_ir_graph; + current_ir_graph = irg; + + ir_reserve_resources(irg, IR_RESOURCE_IRN_VISITED); + inc_irg_visited(irg); + irg_walk_2(irg->anchor, pre, post, env); + ir_free_resources(irg, IR_RESOURCE_IRN_VISITED); + + current_ir_graph = rem; +} typedef struct walk_env { - irg_walk_func *pre; - irg_walk_func *post; - void *env; + irg_walk_func *pre; + irg_walk_func *post; + void *env; } walk_env; +static void walk_initializer(ir_initializer_t *initializer, walk_env *env) +{ + switch (initializer->kind) { + case IR_INITIALIZER_CONST: + irg_walk(initializer->consti.value, env->pre, env->post, env->env); + return; + case IR_INITIALIZER_TARVAL: + case IR_INITIALIZER_NULL: + return; + + case IR_INITIALIZER_COMPOUND: { + size_t i; + for (i = 0; i < initializer->compound.n_initializers; ++i) { + ir_initializer_t *subinitializer + = initializer->compound.initializers[i]; + walk_initializer(subinitializer, env); + } + return; + } + } + panic("invalid initializer found"); +} + /** * Walk to all constant expressions in this entity. */ -static void walk_entity(entity *ent, void *env) +static void walk_entity(ir_entity *ent, void *env) { - walk_env *my_env = (walk_env *)env; + walk_env *my_env = (walk_env *)env; - if (get_entity_variability(ent) != variability_uninitialized) { - if (is_atomic_entity(ent)) { - irg_walk(get_atomic_ent_value(ent), my_env->pre, my_env->post, my_env->env); - } - else { - int i, n_vals = get_compound_ent_n_values(ent); - - for (i = 0; i < n_vals; i++) - irg_walk(get_compound_ent_value(ent, i), my_env->pre, my_env->post, my_env->env); - } - } + if (ent->initializer != NULL) { + walk_initializer(ent->initializer, my_env); + } } -/* Walks over all code in const_code_irg. */ -void walk_const_code(irg_walk_func *pre, irg_walk_func *post, void *env) { - int i, j; - walk_env my_env; - - ir_graph *rem = current_ir_graph; - current_ir_graph = get_const_code_irg(); - inc_irg_visited(current_ir_graph); - - my_env.pre = pre; - my_env.post = post; - my_env.env = env; - - /* Walk all types that can contain constant entities. */ - walk_types_entities(get_glob_type(), &walk_entity, &my_env); - for (i = 0; i < get_irp_n_types(); i++) - walk_types_entities(get_irp_type(i), &walk_entity, &my_env); - for (i = 0; i < get_irp_n_irgs(); i++) - walk_types_entities(get_irg_frame_type(get_irp_irg(i)), &walk_entity, &my_env); - - /* Walk constant array bounds. */ - for (i = 0; i < get_irp_n_types(); i++) { - type *tp = get_irp_type(i); - if (is_Array_type(tp)) { - for (j = 0; j < get_array_n_dimensions(tp); j++) { - ir_node *n = get_array_lower_bound(tp, j); - if (n) irg_walk(n, pre, post, env); - n = get_array_upper_bound(tp, j); - if (n) irg_walk(n, pre, post, env); - } - } - } - - current_ir_graph = rem; +void walk_const_code(irg_walk_func *pre, irg_walk_func *post, void *env) +{ + walk_env my_env; + ir_segment_t s; + size_t i; + size_t n_types; + + ir_graph *rem = current_ir_graph; + current_ir_graph = get_const_code_irg(); + inc_irg_visited(current_ir_graph); + + my_env.pre = pre; + my_env.post = post; + my_env.env = env; + + /* Walk all types that can contain constant entities. */ + for (s = IR_SEGMENT_FIRST; s <= IR_SEGMENT_LAST; ++s) + walk_types_entities(get_segment_type(s), &walk_entity, &my_env); + n_types = get_irp_n_types(); + for (i = 0; i < n_types; i++) + walk_types_entities(get_irp_type(i), &walk_entity, &my_env); + for (i = 0; i < get_irp_n_irgs(); i++) + walk_types_entities(get_irg_frame_type(get_irp_irg(i)), &walk_entity, &my_env); + + /* Walk constant array bounds. */ + for (i = 0; i < n_types; i++) { + ir_type *tp = get_irp_type(i); + if (is_Array_type(tp)) { + size_t j, n_dim = get_array_n_dimensions(tp); + for (j = 0; j < n_dim; j++) { + ir_node *n = get_array_lower_bound(tp, j); + if (n) irg_walk(n, pre, post, env); + n = get_array_upper_bound(tp, j); + if (n) irg_walk(n, pre, post, env); + } + } + } + + current_ir_graph = rem; }