X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firgmod.c;h=fb71f6bae270c138f6afb8126eff0701f7c35005;hb=fd761f39f43ad67aae5217a5d1fdbe9837d766d2;hp=953610b69c483893676757a59d1114a35893033e;hpb=863d31d7a5c8210432fef88b30fc3e8353131538;p=libfirm diff --git a/ir/ir/irgmod.c b/ir/ir/irgmod.c index 953610b69..fb71f6bae 100644 --- a/ir/ir/irgmod.c +++ b/ir/ir/irgmod.c @@ -1,20 +1,29 @@ /* - * Project: libFIRM - * File name: ir/ir/irgmod.c - * Purpose: Support for ir graph modification. - * Author: Martin Trapp, Christian Schaefer - * Modified by: Goetz Lindenmaier - * Created: - * CVS-ID: $Id$ - * Copyright: (c) 1998-2003 Universität Karlsruhe - * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE. + * 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. */ -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif +/** + * @file + * @brief Support for ir graph modification. + * @author Martin Trapp, Christian Schaefer, Goetz Lindenmaier + */ +#include "config.h" -#include "irvrfy.h" #include "irflag_t.h" #include "irgwalk.h" #include "irnode_t.h" @@ -25,35 +34,14 @@ #include "irhooks.h" #include "iredges_t.h" #include "irtools.h" +#include "error.h" -/** - * Turns a node into a "useless" Tuple. The Tuple just forms a tuple - * from several inputs. - * This is useful if a node returning a tuple is removed, but the Projs - * extracting values from the tuple are not available. - */ -void turn_into_tuple (ir_node *node, int arity) +void turn_into_tuple(ir_node *const node, int const arity, ir_node *const *const in) { - assert(node); + set_irn_in(node, arity, in); set_irn_op(node, op_Tuple); - if (get_irn_arity(node) == arity) { - /* keep old array */ - } else { - /* Allocate new array, don't free old in_array, it's on the obstack. */ - ir_node *block = get_nodes_block(node); - edges_node_deleted(node, current_ir_graph); - node->in = NEW_ARR_D(ir_node *, current_ir_graph->obst, arity+1); - /* clear the new in array, else edge_notify tries to delete garbage */ - memset(node->in, 0, (arity+1) * sizeof(node->in[0])); - set_nodes_block(node, block); - } } -/** - * Insert irnode `new' in place of irnode `old' - * Since `new' may be bigger than `old' replace `old' - * by an op_Id which is smaller than everything. - */ void exchange(ir_node *old, ir_node *nw) { ir_graph *irg; @@ -67,24 +55,22 @@ void exchange(ir_node *old, ir_node *nw) hook_replace(old, nw); /* - * If new outs are on, we can skip the id node creation and reroute - * the edges from the old node to the new directly. - */ + * If new outs are on, we can skip the id node creation and reroute + * the edges from the old node to the new directly. + */ if (edges_activated(irg)) { /* copy all dependencies from old to new */ add_irn_deps(nw, old); - edges_reroute(old, nw, irg); - edges_reroute_kind(old, nw, EDGE_KIND_DEP, irg); - edges_node_deleted(old, irg); - old->op = op_Bad; - } - else { + edges_reroute(old, nw); + edges_reroute_kind(old, nw, EDGE_KIND_DEP); + edges_node_deleted(old); + /* noone is allowed to reference this node anymore */ + set_irn_op(old, op_Deleted); + } else { /* Else, do it the old-fashioned way. */ ir_node *block; - assert(get_irn_op(old)->opar != oparity_dynamic); - hook_turn_into_id(old); block = old->in[0]; @@ -92,35 +78,38 @@ void exchange(ir_node *old, ir_node *nw) block = is_Block(nw) ? nw : get_nodes_block(nw); if (! block) { - DDMN(old); - DDMN(nw); - assert(0 && "cannot find legal block for id"); + panic("cannot find legal block for id"); } } + if (get_irn_op(old)->opar == oparity_dynamic) { + DEL_ARR_F(get_irn_in(old)); + } + old->op = op_Id; - old->in = NEW_ARR_D (ir_node *, irg->obst, 2); + old->in = NEW_ARR_D(ir_node*, get_irg_obstack(irg), 2); old->in[0] = block; old->in[1] = nw; } -} -/*--------------------------------------------------------------------*/ -/* Functionality for collect_phis */ -/*--------------------------------------------------------------------*/ + /* update irg flags */ + clear_irg_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_OUTS + | IR_GRAPH_PROPERTY_CONSISTENT_LOOPINFO); +} /** - * Walker: links all Phi nodes to their Blocks and - * all Proj nodes to there predecessors + * Walker: links all Phi nodes to their Blocks lists, + * all Proj nodes to there predecessors. */ -static void collect(ir_node *n, void *env) { +static void collect_phiprojs_walker(ir_node *n, void *env) +{ ir_node *pred; + (void) env; if (is_Phi(n)) { - set_irn_link(n, get_irn_link(get_nodes_block(n))); - set_irn_link(get_nodes_block(n), n); - } - else if (is_Proj(n)) { + ir_node *block = get_nodes_block(n); + add_Block_phi(block, n); + } else if (is_Proj(n)) { pred = n; do { pred = get_Proj_pred(pred); @@ -131,51 +120,95 @@ static void collect(ir_node *n, void *env) { } } -void collect_phiprojs(ir_graph *irg) { - irg_walk_graph(irg, firm_clear_link, collect, NULL); +void collect_phiprojs(ir_graph *irg) +{ + assert((ir_resources_reserved(irg) & (IR_RESOURCE_IRN_LINK|IR_RESOURCE_PHI_LIST)) == + (IR_RESOURCE_IRN_LINK|IR_RESOURCE_PHI_LIST)); + irg_walk_graph(irg, firm_clear_node_and_phi_links, collect_phiprojs_walker, NULL); } - -/*--------------------------------------------------------------------*/ -/* Functionality for part_block */ -/*--------------------------------------------------------------------*/ - /** * Moves node and all predecessors of node from from_bl to to_bl. * Does not move predecessors of Phi nodes (or block nodes). */ -static void move(ir_node *node, ir_node *from_bl, ir_node *to_bl) { +static void move(ir_node *node, ir_node *from_bl, ir_node *to_bl) +{ int i, arity; - ir_node *proj, *pred; /* move this node */ set_nodes_block(node, to_bl); - /* move its projs */ + /* move its Projs */ if (get_irn_mode(node) == mode_T) { - proj = get_irn_link(node); + ir_node *proj = (ir_node*)get_irn_link(node); while (proj) { if (get_nodes_block(proj) == from_bl) set_nodes_block(proj, to_bl); - proj = get_irn_link(proj); + proj = (ir_node*)get_irn_link(proj); } } - /* recursion ... */ - if (get_irn_op(node) == op_Phi) return; + if (is_Phi(node)) + return; + /* recursion ... */ arity = get_irn_arity(node); for (i = 0; i < arity; i++) { - pred = get_irn_n(node, i); + ir_node *pred = get_irn_n(node, i); if (get_nodes_block(pred) == from_bl) move(pred, from_bl, to_bl); } } -void part_block(ir_node *node) { - ir_node *new_block; - ir_node *old_block; - ir_node *phi; +static void move_projs(const ir_node *node, ir_node *to_bl) +{ + if (get_irn_mode(node) != mode_T) + return; + + foreach_out_edge(node, edge) { + ir_node *proj = get_edge_src_irn(edge); + if (!is_Proj(proj)) + continue; + set_nodes_block(proj, to_bl); + move_projs(proj, to_bl); + } +} + +/** + * Moves node and all predecessors of node from from_bl to to_bl. + * Does not move predecessors of Phi nodes (or block nodes). + */ +static void move_edges(ir_node *node, ir_node *from_bl, ir_node *to_bl) +{ + int i, arity; + + /* move this node */ + set_nodes_block(node, to_bl); + + /* move its Projs */ + move_projs(node, to_bl); + + /* We must not move predecessors of Phi nodes, even if they are in + * from_bl. (because these are values from an earlier loop iteration + * which are not predecessors of node here) + */ + if (is_Phi(node)) + return; + + /* recursion ... */ + arity = get_irn_arity(node); + for (i = 0; i < arity; i++) { + ir_node *pred = get_irn_n(node, i); + if (get_nodes_block(pred) == from_bl) + move_edges(pred, from_bl, to_bl); + } +} + +void part_block(ir_node *node) +{ + ir_graph *irg = get_irn_irg(node); + ir_node *new_block, *old_block; + ir_node *phi, *jmp; /* Turn off optimizations so that blocks are not merged again. */ int rem_opt = get_opt_optimize(); @@ -183,29 +216,58 @@ void part_block(ir_node *node) { /* Transform the control flow */ old_block = get_nodes_block(node); - new_block = new_Block(get_Block_n_cfgpreds(old_block), - get_Block_cfgpred_arr(old_block)); - set_irg_current_block(current_ir_graph, new_block); - { - ir_node *jmp = new_Jmp(); - set_irn_in(old_block, 1, &jmp); - irn_vrfy_irg(old_block, current_ir_graph); - } + new_block = new_r_Block(irg, get_Block_n_cfgpreds(old_block), + get_Block_cfgpred_arr(old_block)); + + /* create a jump from new_block to old_block, which is now the lower one */ + jmp = new_r_Jmp(new_block); + set_irn_in(old_block, 1, &jmp); /* move node and its predecessors to new_block */ move(node, old_block, new_block); /* move Phi nodes to new_block */ - phi = get_irn_link(old_block); - set_irn_link(new_block, phi); - set_irn_link(old_block, NULL); + phi = get_Block_phis(old_block); + set_Block_phis(new_block, phi); + set_Block_phis(old_block, NULL); while (phi) { - if(get_nodes_block(phi) == old_block); /* @@@ inlinening chokes on phis that don't - obey this condition. How do they get into - the list??? Example: InterfaceIII */ set_nodes_block(phi, new_block); - phi = get_irn_link(phi); + phi = get_Phi_next(phi); } set_optimize(rem_opt); } + +ir_node *part_block_edges(ir_node *node) +{ + ir_graph *irg = get_irn_irg(node); + ir_node *old_block = get_nodes_block(node); + ir_node *new_block = new_r_Block(irg, get_Block_n_cfgpreds(old_block), get_Block_cfgpred_arr(old_block)); + + /* old_block has no predecessors anymore for now */ + set_irn_in(old_block, 0, NULL); + + /* move node and its predecessors to new_block */ + move_edges(node, old_block, new_block); + + /* move Phi nodes to new_block */ + foreach_out_edge_safe(old_block, edge) { + ir_node *phi = get_edge_src_irn(edge); + if (!is_Phi(phi)) + continue; + set_nodes_block(phi, new_block); + } + + return old_block; +} + +void kill_node(ir_node *node) +{ + ir_graph *irg = get_irn_irg(node); + + if (edges_activated(irg)) { + edges_node_deleted(node); + } + /* noone is allowed to reference this node anymore */ + set_irn_op(node, op_Deleted); +}