/*
- * Project: libFIRM
- * File name: ir/ana/irouts.c
- * Purpose: Compute and access out edges.
- * Author: Goetz Lindenmaier
- * Modified by:
- * Created: 1.2002
- * CVS-ID: $Id$
- * Copyright: (c) 2002-2003 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.
*/
-
-
- /* Copyright (C) 2002 by Universitaet Karlsruhe
-* All rights reserved.
-*
-* Authors: Goetz Lindenmaier
-*
-* irouts.c --- Compute out edges for ir nodes (also called def-use
-* edges).
-*
-*/
-
-/* $Id$ */
-#ifdef HAVE_CONFIG_H
+/**
+ * @file
+ * @brief Compute and access out edges (also called def-use edges).
+ * @author Goetz Lindenmaier, Michael Beck
+ * @date 1.2002
+ */
#include "config.h"
-#endif
+#include <string.h>
+
+#include "xmalloc.h"
#include "irouts.h"
#include "irnode_t.h"
-#include "irgraph_t.h" /* To access irg->outs field (which is private to this module)
- without public access routine */
-#include "irprog.h"
+#include "irgraph_t.h"
+#include "irprog_t.h"
#include "irgwalk.h"
+#include "util.h"
+#include "irprintf.h"
+#include "error.h"
+#include "ircons.h"
-/**********************************************************************/
+/*--------------------------------------------------------------------*/
/** Accessing the out datastructures **/
-/**********************************************************************/
+/*--------------------------------------------------------------------*/
-/* returns the number of successors of the node: */
-INLINE int get_irn_n_outs (ir_node *node) {
- return (int)(node->out[0]);
+#ifdef DEBUG_libfirm
+/** Clear the outs of a node */
+static void reset_outs(ir_node *node, void *unused)
+{
+ (void) unused;
+ node->out = NULL;
+ node->out_valid = 0;
}
+#endif
-/* Access successor n */
-INLINE ir_node *get_irn_out (ir_node *node, int pos) {
- assert(node);
- assert(pos >= 0 && pos < get_irn_n_outs(node));
- return node->out[pos+1];
+int get_irn_outs_computed(const ir_node *node)
+{
+ return node->out != NULL;
}
-INLINE void set_irn_out (ir_node *node, int pos, ir_node *out) {
- assert(node && out);
- assert(pos >= 0 && pos < get_irn_n_outs(node));
- node->out[pos+1] = out;
+int get_irn_n_outs(const ir_node *node)
+{
+ assert(node && node->kind == k_ir_node);
+#ifdef DEBUG_libfirm
+ assert(node->out_valid);
+#endif /* defined DEBUG_libfirm */
+ /* we misuse the first for the size info of the out array */
+ return node->out[0].pos;
}
+ir_node *get_irn_out(const ir_node *def, int pos)
+{
+ assert(pos >= 0 && pos < get_irn_n_outs(def));
+#ifdef DEBUG_libfirm
+ assert(def->out_valid);
+#endif /* defined DEBUG_libfirm */
+ return def->out[pos+1].use;
+}
-INLINE int get_Block_n_cfg_outs (ir_node *bl) {
- int i, n_cfg_outs = 0;
- assert(bl && (get_irn_op(bl) == op_Block));
- for (i = 0; i < (int)bl->out[0]; i++)
- if ((get_irn_mode(bl->out[i+1]) == mode_X) &&
- (get_irn_op(bl->out[i+1]) != op_End)) n_cfg_outs++;
- return n_cfg_outs;
+ir_node *get_irn_out_ex(const ir_node *def, int pos, int *in_pos)
+{
+ assert(pos >= 0 && pos < get_irn_n_outs(def));
+#ifdef DEBUG_libfirm
+ assert(def->out_valid);
+#endif /* defined DEBUG_libfirm */
+ *in_pos = def->out[pos+1].pos;
+ return def->out[pos+1].use;
}
+void set_irn_out(ir_node *def, int pos, ir_node *use, int in_pos)
+{
+ assert(def && use);
+ assert(pos >= 0 && pos < get_irn_n_outs(def));
+#ifdef DEBUG_libfirm
+ assert(def->out_valid);
+#endif /* defined DEBUG_libfirm */
+ def->out[pos+1].use = use;
+ def->out[pos+1].pos = in_pos;
+}
-INLINE ir_node *get_Block_cfg_out (ir_node *bl, int pos) {
- int i, out_pos = 0;
- assert(bl && (get_irn_op(bl) == op_Block));
- for (i = 0; i < (int)bl->out[0]; i++)
- if ((get_irn_mode(bl->out[i+1]) == mode_X) &&
- (get_irn_op(bl->out[i+1]) != op_End)) {
- if (out_pos == pos) {
- ir_node *cfop = bl->out[i+1];
- return cfop->out[0+1];
- } else {
- out_pos++;
- }
- }
- return NULL;
+int get_Block_n_cfg_outs(const ir_node *bl)
+{
+ int i, n_cfg_outs = 0;
+ assert(bl && is_Block(bl));
+#ifdef DEBUG_libfirm
+ assert(bl->out_valid);
+#endif /* defined DEBUG_libfirm */
+ for (i = 1; i <= bl->out[0].pos; ++i) {
+ ir_node *succ = bl->out[i].use;
+ if (get_irn_mode(succ) == mode_X && !is_End(succ) && !is_Bad(succ))
+ n_cfg_outs += succ->out[0].pos;
+ }
+ return n_cfg_outs;
}
-void irg_out_walk_2(ir_node *node, irg_walk_func *pre,
- irg_walk_func *post, void *env) {
- int i;
- ir_node *succ;
+int get_Block_n_cfg_outs_ka(const ir_node *bl)
+{
+ int i, n_cfg_outs = 0;
+ assert(bl && is_Block(bl));
+#ifdef DEBUG_libfirm
+ assert(bl->out_valid);
+#endif /* defined DEBUG_libfirm */
+ for (i = 1; i <= bl->out[0].pos; ++i) {
+ ir_node *succ = bl->out[i].use;
+ if (get_irn_mode(succ) == mode_X) {
+ if (is_Bad(succ))
+ continue;
+ if (is_End(succ)) {
+ /* ignore End if we are in the Endblock */
+ if (get_nodes_block(succ) == bl)
+ continue;
+ else /* count Keep-alive as one */
+ n_cfg_outs += 1;
+ } else
+ n_cfg_outs += succ->out[0].pos;
+ }
+ }
+ return n_cfg_outs;
+}
+
+ir_node *get_Block_cfg_out(const ir_node *bl, int pos)
+{
+ int i;
+ assert(bl && is_Block(bl));
+#ifdef DEBUG_libfirm
+ assert(bl->out_valid);
+#endif /* defined DEBUG_libfirm */
+ for (i = 1; i <= bl->out[0].pos; ++i) {
+ ir_node *succ = bl->out[i].use;
+ if (get_irn_mode(succ) == mode_X && !is_End(succ) && !is_Bad(succ)) {
+ int n_outs = succ->out[0].pos;
+ if (pos < n_outs)
+ return succ->out[pos + 1].use;
+ else
+ pos -= n_outs;
+ }
+ }
+ return NULL;
+}
- assert(node);
- assert(get_irn_visited(node) < get_irg_visited(current_ir_graph));
+ir_node *get_Block_cfg_out_ka(const ir_node *bl, int pos)
+{
+ int i, n_outs;
+ assert(bl && is_Block(bl));
+#ifdef DEBUG_libfirm
+ assert (bl->out_valid);
+#endif /* defined DEBUG_libfirm */
+ for (i = 1; i <= bl->out[0].pos; ++i) {
+ ir_node *succ = bl->out[i].use;
+ if (get_irn_mode(succ) == mode_X) {
+ if (is_Bad(succ))
+ continue;
+ if (is_End(succ)) {
+ ir_node *end_bl = get_nodes_block(succ);
+ if (end_bl == bl) {
+ /* ignore End if we are in the Endblock */
+ continue;
+ }
+ if (pos == 0) {
+ /* handle keep-alive here: return the Endblock instead of the End node */
+ return end_bl;
+ } else
+ --pos;
+ } else {
+ n_outs = succ->out[0].pos;
+ if (pos < n_outs)
+ return succ->out[pos + 1].use;
+ else
+ pos -= n_outs;
+ }
+ }
+ }
+ return NULL;
+}
- set_irn_visited(node, get_irg_visited(current_ir_graph));
+static void irg_out_walk_2(ir_node *node, irg_walk_func *pre,
+ irg_walk_func *post, void *env)
+{
+ int i, n;
+ ir_node *succ;
- if (pre) pre(node, env);
+ assert(node);
+ assert(get_irn_visited(node) < get_irg_visited(current_ir_graph));
- for (i = 0; i < get_irn_n_outs(node); i++) {
- succ = get_irn_out(node, i);
- if (get_irn_visited(succ) < get_irg_visited(current_ir_graph))
- irg_out_walk_2(succ, pre, post, env);
- }
+ set_irn_visited(node, get_irg_visited(current_ir_graph));
- if (post) post(node, env);
+ if (pre) pre(node, env);
- return;
-}
+ for (i = 0, n = get_irn_n_outs(node); i < n; ++i) {
+ succ = get_irn_out(node, i);
+ if (get_irn_visited(succ) < get_irg_visited(current_ir_graph))
+ irg_out_walk_2(succ, pre, post, env);
+ }
-void irg_out_walk(ir_node *node,
- irg_walk_func *pre, irg_walk_func *post,
- void *env) {
- assert(node);
- if (get_irg_outs_state(current_ir_graph) != no_outs) {
- inc_irg_visited (current_ir_graph);
- irg_out_walk_2(node, pre, post, env);
- }
- return;
+ if (post) post(node, env);
}
-void irg_out_block_walk2(ir_node *bl,
- irg_walk_func *pre, irg_walk_func *post,
- void *env) {
- int i;
+void irg_out_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post,
+ void *env)
+{
+ assert(node);
+ ir_graph *irg = get_irn_irg(node);
+ if (irg_has_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_OUTS)) {
+ inc_irg_visited (irg);
+ irg_out_walk_2(node, pre, post, env);
+ }
+}
- assert(get_irn_opcode(bl) == iro_Block);
+static void irg_out_block_walk2(ir_node *bl, irg_walk_func *pre,
+ irg_walk_func *post, void *env)
+{
+ int i, n;
- if(get_Block_block_visited(bl) < get_irg_block_visited(current_ir_graph)) {
- set_Block_block_visited(bl, get_irg_block_visited(current_ir_graph));
+ if (!Block_block_visited(bl)) {
+ mark_Block_block_visited(bl);
- if(pre)
- pre(bl, env);
+ if (pre)
+ pre(bl, env);
- for(i = 0; i < get_Block_n_cfg_outs(bl); i++) {
- /* find the corresponding predecessor block. */
- ir_node *pred = get_Block_cfg_out(bl, i);
- assert(get_irn_opcode(pred) == iro_Block);
- /* recursion */
- irg_out_block_walk2(pred, pre, post, env);
- }
+ for (i = 0, n = get_Block_n_cfg_outs(bl); i < n; ++i) {
+ /* find the corresponding predecessor block. */
+ ir_node *pred = get_Block_cfg_out(bl, i);
+ /* recursion */
+ irg_out_block_walk2(pred, pre, post, env);
+ }
- if(post)
- post(bl, env);
- }
- return;
+ if (post)
+ post(bl, env);
+ }
}
-/* 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_out_block_walk(ir_node *node,
- irg_walk_func *pre, irg_walk_func *post,
- void *env) {
-
- assert((get_irn_op(node) == op_Block) || (get_irn_mode(node) == mode_X));
-
- inc_irg_block_visited(current_ir_graph);
+void irg_out_block_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post,
+ void *env)
+{
- if (get_irn_mode(node) == mode_X) node = node->out[1];
- assert(get_irn_opcode(node) == iro_Block);
+ assert(is_Block(node) || (get_irn_mode(node) == mode_X));
- irg_out_block_walk2(node, pre, post, env);
+ inc_irg_block_visited(current_ir_graph);
- return;
+ if (get_irn_mode(node) == mode_X) {
+ int i, n;
+ for (i = 0, n = get_irn_n_outs(node); i < n; ++i) {
+ ir_node *succ = get_irn_out(node, i);
+ irg_out_block_walk2(succ, pre, post, env);
+ }
+ }
+ else {
+ irg_out_block_walk2(node, pre, post, env);
+ }
}
-/**********************************************************************/
-/** Building and Removing the out datasturcture **/
+/*--------------------------------------------------------------------*/
+/** Building and Removing the out datastructure **/
/** **/
/** The outs of a graph are allocated in a single, large array. **/
/** This allows to allocate and deallocate the memory for the outs **/
/** the large array into smaller parts, sets the out edges and **/
/** recounts the out edges. **/
/** Removes Tuple nodes! **/
-/**********************************************************************/
-
-
-/* Returns the amount of out edges for not yet visited successors. */
-static int count_outs(ir_node *n) {
- int start, i, res, irn_arity;
- ir_node *succ;
-
- set_irn_visited(n, get_irg_visited(current_ir_graph));
- n->out = (ir_node **) 1; /* Space for array size. */
-
- if ((get_irn_op(n) == op_Block)) start = 0; else start = -1;
- irn_arity = get_irn_arity(n);
- res = irn_arity - start +1; /* --1 or --0; 1 for array size. */
- for (i = start; i < irn_arity; i++) {
- /* Optimize Tuples. They annoy if walking the cfg. */
- succ = skip_Tuple(get_irn_n(n, i));
- set_irn_n(n, i, succ);
- /* count outs for successors */
- if (get_irn_visited(succ) < get_irg_visited(current_ir_graph))
- res += count_outs(succ);
- /* Count my outs */
- succ->out = (ir_node **)( (int)succ->out +1);
- }
- return res;
-}
-
-static ir_node **set_out_edges(ir_node *n, ir_node **free) {
- int n_outs, start, i, irn_arity;
- ir_node *succ;
-
- set_irn_visited(n, get_irg_visited(current_ir_graph));
-
- /* Allocate my array */
- n_outs = (int) n->out;
- n->out = free;
- free = &free[n_outs];
- /* We count the successors again, the space will be sufficient.
- We use this counter to remember the position for the next back
- edge. */
- n->out[0] = (ir_node *)0;
-
- if (get_irn_op(n) == op_Block) start = 0; else start = -1;
- irn_arity = get_irn_arity(n);
- for (i = start; i < irn_arity; i++) {
- succ = get_irn_n(n, i);
- /* Recursion */
- if (get_irn_visited(succ) < get_irg_visited(current_ir_graph))
- free = set_out_edges(succ, free);
- /* Remember our back edge */
- succ->out[get_irn_n_outs(succ)+1] = n;
- succ->out[0] = (ir_node *) (get_irn_n_outs(succ) + 1);
- }
- return free;
-}
-
-static INLINE void fix_start_proj(ir_graph *irg) {
- ir_node *proj = NULL, *startbl;
- int i;
- if (get_Block_n_cfg_outs(get_irg_start_block(irg))) {
- startbl = get_irg_start_block(irg);
- for (i = 0; i < get_irn_n_outs(startbl); i++)
- if (get_irn_mode(get_irn_out(startbl, i)) == mode_X)
- proj = get_irn_out(startbl, i);
- if (get_irn_out(proj, 0) == startbl) {
- assert(get_irn_n_outs(proj) == 2);
- set_irn_out(proj, 0, get_irn_out(proj, 1));
- set_irn_out(proj, 1, startbl);
- }
- }
-}
+/*--------------------------------------------------------------------*/
-void compute_outs(ir_graph *irg) {
- ir_graph *rem = current_ir_graph;
- int n_out_edges = 0;
- current_ir_graph = irg;
+/** Returns the amount of out edges for not yet visited successors. */
+static int _count_outs(ir_node *n)
+{
+ int start, i, res, irn_arity;
- /* Update graph state */
- assert(get_irg_phase_state(current_ir_graph) != phase_building);
- current_ir_graph->outs_state = outs_consistent;
+ mark_irn_visited(n);
+ n->out = (ir_def_use_edge*) INT_TO_PTR(1); /* Space for array size. */
- /* This first iteration counts the overall number of out edges and the
- number of out edges for each node. */
- inc_irg_visited(irg);
- n_out_edges = count_outs(get_irg_end(irg));
+ start = is_Block(n) ? 0 : -1;
+ irn_arity = get_irn_arity(n);
+ res = irn_arity - start + 1; /* --1 or --0; 1 for array size. */
- /* allocate memory for all out edges. */
- irg->outs = (ir_node **) malloc (n_out_edges * sizeof(ir_node *));
+ for (i = start; i < irn_arity; ++i) {
+ /* Optimize Tuples. They annoy if walking the cfg. */
+ ir_node *pred = get_irn_n(n, i);
+ ir_node *skipped_pred = skip_Tuple(pred);
- /* The second iteration splits the irg->outs array into smaller arrays
- for each node and writes the back edges into this array. */
- inc_irg_visited(irg);
- set_out_edges(get_irg_end(irg), irg->outs);
+ if (skipped_pred != pred) {
+ set_irn_n(n, i, skipped_pred);
+ }
- /* We want that the out of ProjX from Start contains the next block at
- position 1, the Start block at position 2. This is necessary for
- the out block walker. */
- fix_start_proj(irg);
+ /* count Def-Use edges for predecessors */
+ if (!irn_visited(skipped_pred))
+ res += _count_outs(skipped_pred);
- current_ir_graph = rem;
+ /*count my Def-Use edges */
+ skipped_pred->out = (ir_def_use_edge*) INT_TO_PTR(PTR_TO_INT(skipped_pred->out) + 1);
+ }
+ return res;
}
-
-
-/****************************************************************
- ** This computes the outedges for in interprocedural graph. **
- ** There is one quirk: **
- ** The number of the outedges for each node is saved in **
- ** the first member of the ir_node** array. Maybe we should **
- ** change this to make it more portable... **
- ****************************************************************/
-
-
-/* ------------------------------------------
- Inits the number of outedges for each node
- before counting.
- ------------------------------------------ */
-
-static void init_count(ir_node * node, void * env)
+/** Returns the amount of out edges for not yet visited successors.
+ * This version handles some special nodes like irg_frame, irg_args etc.
+ */
+static int count_outs(ir_graph *irg)
{
- node->out = (ir_node **) 1; /* 1 for the array size */
+ ir_node *n;
+ int i, res;
+
+ inc_irg_visited(irg);
+ res = _count_outs(get_irg_end(irg));
+
+ /* Now handle anchored nodes. We need the out count of those
+ even if they are not visible. */
+ for (i = anchor_last; i >= anchor_first; --i) {
+ n = get_irg_anchor(irg, i);
+ if (!irn_visited_else_mark(n)) {
+ n->out = (ir_def_use_edge*) INT_TO_PTR(1);
+ ++res;
+ }
+ }
+ return res;
}
-
-/* -----------------------------------------------
- Adjusts the out edge count for its predecessors
- and adds the current arity to the overall count,
- which is saved in "env"
- ------------------------------------------------ */
-
-static void node_arity_count(ir_node * node, void * env)
+/**
+ * Enter memory for the outs to a node.
+ *
+ * @param use current node
+ * @param free current free address in the chunk allocated for the outs
+ *
+ * @return The next free address
+ */
+static ir_def_use_edge *_set_out_edges(ir_node *use, ir_def_use_edge *free)
{
- int *anz = (int *) env, arity, i, start;
- ir_node *succ;
-
- arity = 1 + get_irn_arity(node)
- + ((is_Block(node)) ? 0 : 1);
- *anz += arity;
-
- start = (is_Block(node)) ? 0 : -1;
- for(i = start; i < get_irn_arity(node); i++)
- {
- succ = get_irn_n(node, i);
- succ->out = (ir_node **)((int)succ->out + 1);
- }
+ int start, i, irn_arity, pos;
+ size_t n_outs;
+
+ mark_irn_visited(use);
+
+ /* Allocate my array */
+ n_outs = PTR_TO_INT(use->out);
+ use->out = free;
+#ifdef DEBUG_libfirm
+ use->out_valid = 1;
+#endif /* defined DEBUG_libfirm */
+ free += n_outs;
+ /* We count the successors again, the space will be sufficient.
+ We use this counter to remember the position for the next back
+ edge. */
+ use->out[0].pos = 0;
+
+ start = is_Block(use) ? 0 : -1;
+ irn_arity = get_irn_arity(use);
+
+ for (i = start; i < irn_arity; ++i) {
+ ir_node *def = get_irn_n(use, i);
+
+ /* Recursion */
+ if (!irn_visited(def))
+ free = _set_out_edges(def, free);
+
+ /* Remember this Def-Use edge */
+ pos = def->out[0].pos + 1;
+ def->out[pos].use = use;
+ def->out[pos].pos = i;
+
+ /* increase the number of Def-Use edges so far */
+ def->out[0].pos = pos;
+ }
+ return free;
}
+/**
+ * Enter memory for the outs to a node. Handles special nodes
+ *
+ * @param irg the graph
+ * @param free current free address in the chunk allocated for the outs
+ *
+ * @return The next free address
+ */
+static ir_def_use_edge *set_out_edges(ir_graph *irg, ir_def_use_edge *free)
+{
+ ir_node *n;
+ int i;
+
+ inc_irg_visited(irg);
+ free = _set_out_edges(get_irg_end(irg), free);
+
+ /* handle anchored nodes */
+ for (i = anchor_last; i >= anchor_first; --i) {
+ n = get_irg_anchor(irg, i);
+ if (!irn_visited_else_mark(n)) {
+ size_t n_outs = PTR_TO_INT(n->out);
+ n->out = free;
+#ifdef DEBUG_libfirm
+ n->out_valid = 1;
+#endif /* defined DEBUG_libfirm */
+ free += n_outs;
+ }
+ }
+
+ return free;
+}
-/* ----------------------------------------
- Inits all nodes for setting the outedges
- Returns the overall count of edges
- ---------------------------------------- */
-
-int count_ip_outs(void) {
-
- int res = 0;
+void compute_irg_outs(ir_graph *irg)
+{
+ ir_graph *rem = current_ir_graph;
+ int n_out_edges = 0;
+ ir_def_use_edge *end = NULL; /* Only for debugging */
- cg_walk(init_count, node_arity_count, &res);
+ current_ir_graph = irg;
- return(res);
-}
+ /* Update graph state */
+ assert(get_irg_phase_state(current_ir_graph) != phase_building);
-int dummy_count = 0, global_count; /* Only for debugging */
-
-/* ---------------------------------------------
- For each node: Sets the pointer to array
- in which the outedges are written later.
- The current array start is transported in env
- --------------------------------------------- */
-
-static void set_array_pointer(ir_node *node, void *env) {
-
- int n_outs;
- ir_node ***free = (ir_node ***) env;
-
- /* Allocate my array */
- n_outs = (int) node -> out; /* We wrote the count here in count_ip_outs */
- dummy_count += n_outs;
- assert(dummy_count <= global_count && "More outedges than initialliy counted!");
- node -> out = *free;
- *free = &((*free)[n_outs]);
- /* We count the successors again, the space will be sufficient.
- We use this counter to remember the position for the next back
- edge. */
- node -> out[0] = (ir_node *) 0;
-}
+ free_irg_outs(current_ir_graph);
+ /* This first iteration counts the overall number of out edges and the
+ number of out edges for each node. */
+ n_out_edges = count_outs(irg);
-/* -------------------------------------------
- Adds an outedge from the predecessor to the
- current node.
- ------------------------------------------- */
+ /* allocate memory for all out edges. */
+ irg->outs = XMALLOCNZ(ir_def_use_edge, n_out_edges);
+#ifdef DEBUG_libfirm
+ irg->n_outs = n_out_edges;
+#endif /* defined DEBUG_libfirm */
-static void set_out_pointer(ir_node * node, void * env) {
+ /* The second iteration splits the irg->outs array into smaller arrays
+ for each node and writes the back edges into this array. */
+ end = set_out_edges(irg, irg->outs);
- ir_node *succ;
- int start = (!is_Block(node)) ? -1 : 0;
+ /* Check how much memory we have used */
+ assert (end == (irg->outs + n_out_edges));
- for(int i = start; i < get_irn_arity(node); i++)
- {
- succ = get_irn_n(node, i);
- succ->out[get_irn_n_outs(succ)+1] = node;
- succ->out[0] = (ir_node *) (get_irn_n_outs(succ) + 1);
- }
+ add_irg_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_OUTS);
+ current_ir_graph = rem;
}
-
-/* -------------------------------
- Sets the outedges for all nodes.
- -------------------------------- */
-
-void set_ip_outs(void)
+void assure_irg_outs(ir_graph *irg)
{
- ir_node **outedge_array = get_irp_ip_outedges();
- cg_walk(set_array_pointer, set_out_pointer, (void *) &outedge_array);
+ if (! irg_has_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_OUTS))
+ compute_irg_outs(irg);
}
-
-
-/* --------------------------------------------------------
- Counts the outedges, allocates memory to save the
- outedges and fills this outedge array in interprocedural
- view!
- -------------------------------------------------------- */
-
-void ascompute_ip_outs(void) {
-
- int n_out_edges;
- ir_node **out_edges;
-
- global_count = n_out_edges = count_ip_outs();
- out_edges = (ir_node **) malloc (n_out_edges * sizeof(ir_node *));
- set_irp_ip_outedges(out_edges);
- set_ip_outs();
+void compute_irp_outs(void)
+{
+ size_t i, n;
+ for (i = 0, n = get_irp_n_irgs(); i < n; ++i)
+ compute_irg_outs(get_irp_irg(i));
}
-void free_ip_outs(void)
+void free_irp_outs(void)
{
- ir_node **out_edges = get_irp_ip_outedges();
- if(out_edges != NULL)
- {
- free(out_edges);
- set_irp_ip_outedges(NULL);
- }
+ size_t i, n;
+ for (i = 0, n = get_irp_n_irgs(); i < n; ++i)
+ free_irg_outs(get_irp_irg(i));
}
-
-void free_outs(ir_graph *irg) {
-
- /* Update graph state */
- assert(get_irg_phase_state(current_ir_graph) != phase_building);
- current_ir_graph->outs_state = no_outs;
-
- if (irg->outs) free(irg->outs);
- irg->outs = NULL;
+void free_irg_outs(ir_graph *irg)
+{
+ /* current_ir_graph->outs_state = outs_none; */
+
+ if (irg->outs) {
+#ifdef DEBUG_libfirm
+ memset(irg->outs, 0, irg->n_outs);
+#endif /* defined DEBUG_libfirm */
+ free(irg->outs);
+ irg->outs = NULL;
+#ifdef DEBUG_libfirm
+ irg->n_outs = 0;
+#endif /* defined DEBUG_libfirm */
+ }
+
+#ifdef DEBUG_libfirm
+ /* when debugging, *always* reset all nodes' outs! irg->outs might
+ have been lying to us */
+ irg_walk_graph (irg, reset_outs, NULL, NULL);
+#endif /* defined DEBUG_libfirm */
}
projects / libfirm / blobdiff