/*
- * Project: libFIRM
- * File name: ir/ir/iredges.c
- * Purpose: Always available outs.
- * Author: Sebastian Hack
- * Modified by: Michael Beck
- * Created: 14.1.2005
- * CVS-ID: $Id$
- * Copyright: (c) 1998-2006 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.
*/
/**
- * Always available outs.
- * @author Sebastian Hack
- * @date 14.1.2005
+ * @file
+ * @brief Always available outs.
+ * @author Sebastian Hack, Michael Beck, Andreas Schoesser
+ * @date 14.1.2005
+ * @version $Id$
+ * @summary
+ * This are out-edges (also called def-use edges) that are dynamically
+ * updated as the graph changes.
*/
-
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
-
-#ifdef HAVE_ALLOCA_H
-#include <alloca.h>
-#endif
-#ifdef HAVE_MALLOC_H
-#include <malloc.h>
-#endif
#include "irnode_t.h"
#include "iropt_t.h"
#include "irgwalk.h"
#include "irdump_t.h"
#include "irprintf.h"
-#include "irhooks.h"
#include "debug.h"
#include "set.h"
+#include "bitset.h"
+#include "error.h"
+
+#include "iredgeset.h"
+#include "hashptr.h"
+
+#define DO_REHASH
+#define SCALAR_RETURN
+#define HashSet ir_edgeset_t
+#define HashSetIterator ir_edgeset_iterator_t
+#define ValueType ir_edge_t*
+#define NullValue NULL
+#define DeletedValue ((ir_edge_t*)-1)
+#define Hash(this,key) (HASH_PTR(key->src) ^ (key->pos * 40013))
+#define KeysEqual(this,key1,key2) ((key1->src) == (key2->src) && (key1->pos == key2->pos))
+#define SetRangeEmpty(ptr,size) memset(ptr, 0, (size) * sizeof((ptr)[0]))
+
+#define hashset_init ir_edgeset_init
+#define hashset_init_size ir_edgeset_init_size
+#define hashset_destroy ir_edgeset_destroy
+#define hashset_insert ir_edgeset_insert
+#define hashset_remove ir_edgeset_remove
+#define hashset_find ir_edgeset_find
+#define hashset_size ir_edgeset_size
+#define hashset_iterator_init ir_edgeset_iterator_init
+#define hashset_iterator_next ir_edgeset_iterator_next
+#define hashset_remove_iterator ir_edgeset_remove_iterator
+
+#include "hashset.c"
/**
-* A function that allows for setting an edge.
-* This abstraction is necessary since different edge kind have
-* different methods of setting edges.
-*/
+ * A function that allows for setting an edge.
+ * This abstraction is necessary since different edge kind have
+ * different methods of setting edges.
+ */
typedef void (set_edge_func_t)(ir_node *src, int pos, ir_node *tgt);
typedef int (get_edge_src_arity_func_t)(const ir_node *src);
-typedef int (get_edge_src_first_func_t)(const ir_node *src);
-
typedef ir_node *(get_edge_src_n_func_t)(const ir_node *src, int pos);
/**
-* Additional data for an edge kind.
-*/
+ * Additional data for an edge kind.
+ */
typedef struct {
- const char *name;
- set_edge_func_t *set_edge;
- get_edge_src_first_func_t *get_first;
- get_edge_src_arity_func_t *get_arity;
- get_edge_src_n_func_t *get_n;
+ const char *name; /**< name of this edge kind */
+ set_edge_func_t *set_edge; /**< the set_edge function */
+ int first_idx; /**< index of the first possible edge */
+ get_edge_src_arity_func_t *get_arity; /**< the get_arity function */
+ get_edge_src_n_func_t *get_n; /**< the get_n function */
} ir_edge_kind_info_t;
-static int get_zero(const ir_node *irn)
-{
- return 0;
-}
-
-static int get_irn_first(const ir_node *irn)
-{
- return 0 - !is_Block(irn);
-}
-
-static ir_node *get_block_n(const ir_node *irn, int pos)
-{
- return is_Block(irn) ? get_Block_cfgpred_block((ir_node *) irn, pos) : 0;
+/**
+ * Get the predecessor block.
+ */
+static ir_node *get_block_n(const ir_node *irn, int pos) {
+ if (is_Block(irn))
+ return get_Block_cfgpred_block(irn, pos);
+ /* might be a Bad */
+ return NULL;
}
static const ir_edge_kind_info_t edge_kind_info[EDGE_KIND_LAST] = {
- { "normal" , set_irn_n, get_irn_first, get_irn_arity, get_irn_n },
- { "block succs", NULL, get_zero, get_irn_arity, get_block_n },
- { "dependency", set_irn_dep, get_zero, get_irn_deps, get_irn_dep }
+ { "normal" , set_irn_n, -1, get_irn_arity, get_irn_n },
+ { "block succs", NULL, 0, get_irn_arity, get_block_n },
+ { "dependency", set_irn_dep, 0, get_irn_deps, get_irn_dep }
};
-#define foreach_tgt(irn, i, n, kind) for(i = edge_kind_info[kind].get_first(irn), n = edge_kind_info[kind].get_arity(irn); i < n; ++i)
+#define foreach_tgt(irn, i, n, kind) for(i = edge_kind_info[kind].first_idx, n = edge_kind_info[kind].get_arity(irn); i < n; ++i)
#define get_n(irn, pos, kind) (edge_kind_info[kind].get_n(irn, pos))
#define get_kind_str(kind) (edge_kind_info[kind].name)
*/
static int edges_used = 0;
+/**
+ * Summed size of all users private data
+ */
+
static int edges_private_size = 0;
+#define EDGE_SIZE (sizeof(ir_edge_t) + edges_private_size)
-int edges_register_private_data(size_t n)
-{
+/**
+ * If set to 1, the list heads are checked every time an edge is changed.
+ */
+static int edges_dbg = 0;
+
+#ifdef DEBUG_libfirm
+/* a static variable holding the last number assigned to a new edge */
+static long last_edge_num = -1;
+#endif
+
+static inline long edge_get_id(const ir_edge_t *e) {
+#ifdef DEBUG_libfirm
+ return e->edge_nr;
+#else /* DEBUG_libfirm */
+ return (long)e;
+#endif /* DEBUG_libfirm */
+}
+
+/**
+ * Announce to reserve extra space for each edge to be allocated.
+ *
+ * @param n: Size of the space to reserve
+ *
+ * @return Offset at which the private data will begin
+ *
+ * Several users can reserve extra space for private usage.
+ * Each user has to remember his given offset and the size of his private data.
+ * To be called before FIRM is initialized.
+ */
+int edges_register_private_data(size_t n) {
int res = edges_private_size;
assert(!edges_used && "you cannot register private edge data, if edges have been initialized");
return res;
}
-#define TIMES37(x) (((x) << 5) + ((x) << 2) + (x))
+/*
+ * Reset the user's private data at offset 'offset'
+ * The user has to remember his offset and the size of his data!
+ * Caution: Using wrong values here can destroy other users private data!
+ */
+void edges_reset_private_data(ir_graph *irg, int offset, unsigned size) {
+ irg_edge_info_t *info = _get_irg_edge_info(irg, EDGE_KIND_NORMAL);
+ ir_edge_t *edge;
+ ir_edgeset_iterator_t iter;
-#define get_irn_out_list_head(irn) (&get_irn_out_info(irn)->outs)
+ foreach_ir_edgeset(&info->edges, edge, iter) {
+ memset(edge + sizeof(*edge) + offset, 0, size);
+ }
+}
-static int edge_cmp(const void *p1, const void *p2, size_t len)
-{
- const ir_edge_t *e1 = p1;
- const ir_edge_t *e2 = p2;
- int res = e1->src == e2->src && e1->pos == e2->pos;
+#define TIMES37(x) (((x) << 5) + ((x) << 2) + (x))
- return !res;
-}
+#define get_irn_out_list_head(irn) (&get_irn_out_info(irn)->outs)
#define edge_hash(edge) (TIMES37((edge)->pos) + HASH_PTR((edge)->src))
* Initialize the out information for a graph.
* @note Dead node elimination can call this on an already initialized graph.
*/
-void edges_init_graph_kind(ir_graph *irg, ir_edge_kind_t kind)
-{
- if(edges_activated_kind(irg, kind)) {
+void edges_init_graph_kind(ir_graph *irg, ir_edge_kind_t kind) {
+ if (edges_activated_kind(irg, kind)) {
irg_edge_info_t *info = _get_irg_edge_info(irg, kind);
- int amount = 2048;
+ size_t amount = irg->estimated_node_count * 2;
edges_used = 1;
- if(info->edges) {
- amount = set_count(info->edges);
- del_set(info->edges);
+ if(info->allocated) {
+ amount = ir_edgeset_size(&info->edges);
+ ir_edgeset_destroy(&info->edges);
+ obstack_free(&info->edges_obst, NULL);
}
- info->edges = new_set(edge_cmp, amount);
+ obstack_init(&info->edges_obst);
+ INIT_LIST_HEAD(&info->free_edges);
+ ir_edgeset_init_size(&info->edges, amount);
+ info->allocated = 1;
}
}
*/
const ir_edge_t *get_irn_edge_kind(ir_graph *irg, const ir_node *src, int pos, ir_edge_kind_t kind)
{
- if(edges_activated_kind(irg, kind)) {
+ if (edges_activated_kind(irg, kind)) {
irg_edge_info_t *info = _get_irg_edge_info(irg, kind);
- ir_edge_t key;
+ ir_edge_t key;
- key.src = (ir_node *) src;
+ key.src = (ir_node *)src;
key.pos = pos;
- return set_find(info->edges, &key, sizeof(key), edge_hash(&key));
+
+ return ir_edgeset_find(&info->edges, &key);
}
return NULL;
}
+/**
+ * Get the edge object of an outgoing edge at a node.
+ * Looks for an edge for all kinds.
+ */
+const ir_edge_t *get_irn_edge(ir_graph *irg, const ir_node *src, int pos) {
+ const ir_edge_t *edge;
+ if((edge = get_irn_edge_kind(irg, src, pos, EDGE_KIND_NORMAL)) == NULL)
+ edge = get_irn_edge_kind(irg, src, pos, EDGE_KIND_BLOCK);
+ return(edge);
+}
+
/**
* Change the out count
+ *
+ * @param tgt the edge target
+ * @param kind the kind of the edge
*/
-static INLINE void edge_change_cnt(ir_node *tgt, ir_edge_kind_t kind, int ofs) {
+static inline void edge_change_cnt(ir_node *tgt, ir_edge_kind_t kind, int ofs) {
irn_edge_info_t *info = _get_irn_edge_info(tgt, kind);
info->out_count += ofs;
+
+#if 0
+ assert(info->out_count >= 0);
+ if (info->out_count == 0 && kind == EDGE_KIND_NORMAL) {
+ /* tgt lost it's last user */
+ int i;
+
+ for (i = get_irn_arity(tgt) - 1; i >= -1; --i) {
+ ir_node *prev = get_irn_n(tgt, i);
+
+ edges_notify_edge(tgt, i, NULL, prev, current_ir_graph);
+ }
+ for (i = get_irn_deps(tgt) - 1; i >= 0; --i) {
+ ir_node *prev = get_irn_dep(tgt, i);
+
+ edges_notify_edge_kind(tgt, i, NULL, prev, EDGE_KIND_DEP, current_ir_graph);
+
+ }
+ }
+#endif
+}
+
+/**
+ * Verify the edge list of a node, ie. ensure it's a loop:
+ * head -> e_1 -> ... -> e_n -> head
+ */
+static inline void vrfy_list_head(ir_node *irn, ir_edge_kind_t kind) {
+ int err = 0;
+ int num = 0;
+ pset *lh_set = pset_new_ptr(16);
+ const struct list_head *head = _get_irn_outs_head(irn, kind);
+ const struct list_head *pos;
+
+ list_for_each(pos, head) {
+ if (pset_find_ptr(lh_set, pos)) {
+ const ir_edge_t *edge = list_entry(pos, ir_edge_t, list);
+
+ ir_fprintf(stderr, "EDGE Verifier: edge list broken (self loop not to head) for %+F:\n", irn);
+ fprintf(stderr, "- at list entry %d\n", num);
+ if (edge->invalid)
+ fprintf(stderr, "- edge(%ld) is invalid\n", edge_get_id(edge));
+ if (edge->src)
+ ir_fprintf(stderr, "- edge(%ld) %+F(%d)\n", edge_get_id(edge), edge->src, edge->pos);
+ err = 1;
+ break;
+ }
+ num++;
+ pset_insert_ptr(lh_set, pos);
+ }
+
+ del_pset(lh_set);
+
+ assert(err == 0);
}
/* The edge from (src, pos) -> old_tgt is redirected to tgt */
-void edges_notify_edge_kind(ir_node *src, int pos, ir_node *tgt, ir_node *old_tgt, ir_edge_kind_t kind, ir_graph *irg)
+void edges_notify_edge_kind(ir_node *src, int pos, ir_node *tgt,
+ ir_node *old_tgt, ir_edge_kind_t kind,
+ ir_graph *irg)
{
- const char *msg = "";
+ const char *msg = "";
+ irg_edge_info_t *info;
+ ir_edgeset_t *edges;
+ ir_edge_t templ;
+ ir_edge_t *edge;
- if(!edges_activated_kind(irg, kind))
- return;
+ assert(edges_activated_kind(irg, kind));
/*
* Only do something, if the old and new target differ.
*/
- if(tgt != old_tgt) {
- irg_edge_info_t *info = _get_irg_edge_info(irg, kind);
- set *edges = info->edges;
- ir_edge_t *templ = alloca(sizeof(templ[0]));
- ir_edge_t *edge;
-
- /* Initialize the edge template to search in the set. */
- memset(templ, 0, sizeof(templ[0]));
- templ->src = src;
- templ->pos = pos;
- templ->invalid = 0;
- templ->present = 0;
- templ->kind = kind;
- DEBUG_ONLY(templ->src_nr = get_irn_node_nr(src));
-
- /*
- * If the target is NULL, the edge shall be deleted.
- */
- if (tgt == NULL) {
- /* search the edge in the set. */
- edge = set_find(edges, templ, sizeof(templ[0]), edge_hash(templ));
+ if (tgt == old_tgt)
+ return;
- /* mark the edge invalid if it was found */
- if(edge) {
- ir_block_edge_t *block_edge = (ir_block_edge_t *) edge;
+ info = _get_irg_edge_info(irg, kind);
+ edges = &info->edges;
- msg = "deleting";
- list_del(&edge->list);
- edge->invalid = 1;
- edge->pos = -2;
- edge->src = NULL;
- }
+ /* Initialize the edge template to search in the set. */
+ templ.src = src;
+ templ.pos = pos;
+ /*
+ * If the target is NULL, the edge shall be deleted.
+ */
+ if (tgt == NULL) {
+ /* search the edge in the set. */
+ edge = ir_edgeset_find(edges, &templ);
+
+ /* mark the edge invalid if it was found */
+ if (edge) {
+ msg = "deleting";
+ list_del(&edge->list);
+ ir_edgeset_remove(edges, edge);
+ list_add(&edge->list, &info->free_edges);
+ edge->invalid = 1;
+ edge->pos = -2;
+ edge->src = NULL;
+#ifdef DEBUG_libfirm
+ edge->edge_nr = -1;
+#endif /* DEBUG_libfirm */
+ edge_change_cnt(old_tgt, kind, -1);
+ } else {
/* If the edge was not found issue a warning on the debug stream */
- else {
- msg = "edge to delete not found!\n";
- }
- } /* if */
-
+ msg = "edge to delete not found!\n";
+ }
+ } else {
/*
* The target is not NULL and the old target differs
* from the new target, the edge shall be moved (if the
* old target was != NULL) or added (if the old target was
* NULL).
*/
- else {
- struct list_head *head = _get_irn_outs_head(tgt, kind);
-
- assert(head->next && head->prev &&
- "target list head must have been initialized");
-
- /*
- * insert the edge, if it is not yet in the set or return
- * the instance in the set.
- */
- edge = set_insert(edges, templ, sizeof(templ[0]), edge_hash(templ));
-
-#ifdef DEBUG_libfirm
- assert(!edge->invalid && "Invalid edge encountered");
-#endif
-
- /* If the old target is not null, the edge is moved. */
- if(old_tgt) {
- msg = "redirecting";
-
- list_move(&edge->list, head);
- edge_change_cnt(old_tgt, kind, -1);
+ struct list_head *head = _get_irn_outs_head(tgt, kind);
+
+ assert(head->next && head->prev &&
+ "target list head must have been initialized");
+
+ /* If the old target is not null, the edge is moved. */
+ if (old_tgt) {
+ edge = ir_edgeset_find(edges, &templ);
+ assert(edge && "edge to redirect not found!");
+ assert(! edge->invalid && "Invalid edge encountered");
+
+ msg = "redirecting";
+
+ list_move(&edge->list, head);
+ edge_change_cnt(old_tgt, kind, -1);
+ } else {
+ /* The old target was NULL, thus, the edge is newly created. */
+ ir_edge_t *new_edge;
+ ir_edge_t *edge;
+
+ if (list_empty(&info->free_edges)) {
+ edge = obstack_alloc(&info->edges_obst, EDGE_SIZE);
+ } else {
+ edge = list_entry(info->free_edges.next, ir_edge_t, list);
+ list_del(&edge->list);
}
- /* The old target was null, thus, the edge is newly created. */
- else {
- msg = "adding";
- list_add(&edge->list, head);
+ edge->src = src;
+ edge->pos = pos;
+ edge->invalid = 0;
+ edge->present = 0;
+ edge->kind = kind;
+ edge->list.next = NULL;
+ edge->list.prev = NULL;
+ memset(((char*)edge) + sizeof(ir_edge_t), 0, edges_private_size);
+ DEBUG_ONLY(edge->src_nr = get_irn_node_nr(src));
+
+ new_edge = ir_edgeset_insert(edges, edge);
+ if (new_edge != edge) {
+ panic("new edge exists already");
}
- edge_change_cnt(tgt, kind, +1);
- } /* else */
+ msg = "adding";
+ list_add(&edge->list, head);
+ DEBUG_ONLY(edge->edge_nr = ++last_edge_num);
+ }
+
+ edge_change_cnt(tgt, kind, +1);
+ } /* else */
+
+#ifndef DEBUG_libfirm
+ /* verify list heads */
+ if (edges_dbg) {
+ if (tgt)
+ vrfy_list_head(tgt, kind);
+ if (old_tgt)
+ vrfy_list_head(old_tgt, kind);
}
+#endif
- /* If the target and the old target are equal, nothing is done. */
DBG((dbg, LEVEL_5, "announce out edge: %+F %d-> %+F(%+F): %s\n", src, pos, tgt, old_tgt, msg));
}
void edges_notify_edge(ir_node *src, int pos, ir_node *tgt, ir_node *old_tgt, ir_graph *irg)
{
- edges_notify_edge_kind(src, pos, tgt, old_tgt, EDGE_KIND_NORMAL, irg);
- if(is_Block(src)) {
- ir_node *bl_tgt = tgt ? get_nodes_block(skip_Proj(tgt)) : NULL;
- // ir_node *bl_old = old_tgt ? old_tgt : NULL;
- ir_node *bl_old = old_tgt ? get_nodes_block(skip_Proj(old_tgt)) : NULL;
- edges_notify_edge_kind(src, pos, bl_tgt, bl_old, EDGE_KIND_BLOCK, irg);
+ if (edges_activated_kind(irg, EDGE_KIND_NORMAL)) {
+ edges_notify_edge_kind(src, pos, tgt, old_tgt, EDGE_KIND_NORMAL, irg);
}
-}
+ if (edges_activated_kind(irg, EDGE_KIND_BLOCK) && is_Block(src)) {
+ if (pos == -1) {
+ /* a MacroBlock edge: ignore it here */
+ } else {
+ ir_node *bl_old = old_tgt ? get_nodes_block(skip_Proj(old_tgt)) : NULL;
+ ir_node *bl_tgt = NULL;
+
+ if (tgt)
+ bl_tgt = is_Bad(tgt) ? tgt : get_nodes_block(skip_Proj(tgt));
+
+ edges_notify_edge_kind(src, pos, bl_tgt, bl_old, EDGE_KIND_BLOCK, irg);
+ }
+ }
+}
-void edges_node_deleted_kind(ir_node *old, ir_edge_kind_t kind, ir_graph *irg)
+/**
+ * Delete all in edges of a given kind from the node old.
+ *
+ * @param old the node
+ * @param kind the kind of edges to remove
+ * @param irg the irg of the old node
+ */
+static void edges_node_deleted_kind(ir_node *old, ir_edge_kind_t kind, ir_graph *irg)
{
- if(edges_activated_kind(irg, kind)) {
- int i, n;
+ int i, n;
- DBG((dbg, LEVEL_5, "node deleted (kind: %s): %+F\n", get_kind_str(kind), old));
+ if (!edges_activated_kind(irg, kind))
+ return;
- foreach_tgt(old, i, n, kind) {
- ir_node *old_tgt = get_n(old, i, kind);
- edges_notify_edge_kind(old, i, NULL, old_tgt, kind, irg);
- }
+ DBG((dbg, LEVEL_5, "node deleted (kind: %s): %+F\n", get_kind_str(kind), old));
+
+ foreach_tgt(old, i, n, kind) {
+ ir_node *old_tgt = get_n(old, i, kind);
+ edges_notify_edge_kind(old, i, NULL, old_tgt, kind, irg);
}
}
struct build_walker {
- ir_graph *irg;
+ ir_graph *irg;
ir_edge_kind_t kind;
+ bitset_t *reachable;
+ unsigned problem_found;
};
/**
* Post-Walker: notify all edges
*/
static void build_edges_walker(ir_node *irn, void *data) {
- struct build_walker *w = data;
- int i, n;
-
- foreach_tgt(irn, i, n, w->kind)
- edges_notify_edge_kind(irn, i, get_n(irn, i, w->kind), NULL, w->kind, w->irg);
+ struct build_walker *w = data;
+ int i, n;
+ ir_edge_kind_t kind = w->kind;
+ ir_graph *irg = w->irg;
+ get_edge_src_n_func_t *get_n;
+
+ get_n = edge_kind_info[kind].get_n;
+ foreach_tgt(irn, i, n, kind) {
+ ir_node *pred = get_n(irn, i, kind);
+ edges_notify_edge_kind(irn, i, pred, NULL, kind, irg);
+ }
}
/**
* of all nodes to 0.
*/
static void init_lh_walker(ir_node *irn, void *data) {
- struct build_walker *w = data;
- INIT_LIST_HEAD(_get_irn_outs_head(irn, w->kind));
- _get_irn_edge_info(irn, w->kind)->out_count = 0;
+ struct build_walker *w = data;
+ ir_edge_kind_t kind = w->kind;
+ list_head *head = _get_irn_outs_head(irn, kind);
+ INIT_LIST_HEAD(head);
+ _get_irn_edge_info(irn, kind)->out_count = 0;
+}
+
+/**
+ * Pre-Walker: initializes the list-heads and set the out-count
+ * of all nodes to 0.
+ *
+ * Additionally touches DEP nodes, as they might be DEAD.
+ * THIS IS UGLY, but I don't find a better way until we
+ *
+ * a) ensure that dead nodes are not used as input
+ * b) it might be sufficient to add those stupid NO_REG nodes
+ * to the anchor
+ */
+static void init_lh_walker_dep(ir_node *irn, void *data) {
+ struct build_walker *w = data;
+ ir_edge_kind_t kind = w->kind;
+ list_head *head = _get_irn_outs_head(irn, kind);
+ int i;
+
+ INIT_LIST_HEAD(head);
+ _get_irn_edge_info(irn, kind)->out_count = 0;
+
+ for (i = get_irn_deps(irn) - 1; i >= 0; --i) {
+ ir_node *dep = get_irn_dep(irn, i);
+
+ head = _get_irn_outs_head(dep, kind);
+
+ INIT_LIST_HEAD(head);
+ _get_irn_edge_info(dep, kind)->out_count = 0;
+ }
}
+typedef struct visitor_info_t {
+ irg_walk_func *visit;
+ void *data;
+} visitor_info_t;
+
/**
* Visitor: initializes the list-heads and set the out-count
* of all nodes to 0 of nodes that are not seen so far.
*/
static void visitor(ir_node *irn, void *data) {
- if (irn_not_visited(irn)) {
+ visitor_info_t *info = data;
+
+ if (!irn_visited(irn)) {
mark_irn_visited(irn);
- init_lh_walker(irn, data);
+ info->visit(irn, info->data);
}
}
void edges_activate_kind(ir_graph *irg, ir_edge_kind_t kind)
{
struct build_walker w;
- irg_edge_info_t *info = _get_irg_edge_info(irg, kind);
+ irg_edge_info_t *info = _get_irg_edge_info(irg, kind);
+ visitor_info_t visit;
w.irg = irg;
w.kind = kind;
+ visit.data = &w;
+
+ assert(!info->activated);
+
info->activated = 1;
edges_init_graph_kind(irg, kind);
- irg_walk_graph(irg, init_lh_walker, build_edges_walker, &w);
- irg_walk_anchors(irg, init_lh_walker, NULL, &w);
- visit_all_identities(irg, visitor, &w);
+ if (kind == EDGE_KIND_DEP) {
+ irg_walk_anchors(irg, init_lh_walker_dep, NULL, &w);
+ /* Argh: Dep nodes might be dead, so we MUST visit identities first */
+ visit.visit = init_lh_walker_dep;
+ visit_all_identities(irg, visitor, &visit);
+ irg_walk_anchors(irg, NULL, build_edges_walker, &w);
+ } else {
+ irg_walk_anchors(irg, init_lh_walker, build_edges_walker, &w);
+ visit.visit = init_lh_walker;
+ visit_all_identities(irg, visitor, &visit);
+ }
}
void edges_deactivate_kind(ir_graph *irg, ir_edge_kind_t kind)
irg_edge_info_t *info = _get_irg_edge_info(irg, kind);
info->activated = 0;
- if (info->edges) {
- del_set(info->edges);
- info->edges = NULL;
+ if (info->allocated) {
+ obstack_free(&info->edges_obst, NULL);
+ ir_edgeset_destroy(&info->edges);
+ info->allocated = 0;
}
}
DBG((dbg, LEVEL_5, "reroute from %+F to %+F\n", from, to));
- while(head != head->next) {
+ while (head != head->next) {
ir_edge_t *edge = list_entry(head->next, ir_edge_t, list);
assert(edge->pos >= -1);
set_edge(edge->src, edge->pos, to);
static void verify_set_presence(ir_node *irn, void *data)
{
- struct build_walker *w = data;
- set *edges = _get_irg_edge_info(w->irg, w->kind)->edges;
- int not_a_block = !is_Block(irn);
+ struct build_walker *w = data;
+ ir_edgeset_t *edges = &_get_irg_edge_info(w->irg, w->kind)->edges;
int i, n;
foreach_tgt(irn, i, n, w->kind) {
templ.src = irn;
templ.pos = i;
- e = set_find(edges, &templ, sizeof(templ), edge_hash(&templ));
- if(e != NULL)
+ e = ir_edgeset_find(edges, &templ);
+ if(e != NULL) {
e->present = 1;
- else
- DBG((dbg, LEVEL_DEFAULT, "edge %+F,%d (kind: \"%s\") is missing\n", irn, i, get_kind_str(w->kind)));
+ } else {
+ w->problem_found = 1;
+#if 0
+ ir_fprintf(stderr, "Edge Verifier: edge %+F,%d -> %+F (kind: \"%s\") is missing\n",
+ irn, i, get_n(irn, i, w->kind), get_kind_str(w->kind));
+#endif
+ }
}
}
static void verify_list_presence(ir_node *irn, void *data)
{
struct build_walker *w = data;
- const ir_edge_t *e;
+ const ir_edge_t *e;
+
+ bitset_set(w->reachable, get_irn_idx(irn));
+
+ /* check list heads */
+ vrfy_list_head(irn, w->kind);
foreach_out_edge_kind(irn, e, w->kind) {
- ir_node *tgt = get_n(e->src, e->pos, w->kind);
- if(irn != tgt)
- DBG((dbg, LEVEL_DEFAULT, "edge %+F,%d (kind \"%s\") is no out edge of %+F but of %+F\n", e->src, e->pos, get_kind_str(w->kind), irn, tgt));
+ ir_node *tgt;
+
+ if (w->kind == EDGE_KIND_NORMAL && get_irn_arity(e->src) <= e->pos) {
+ w->problem_found = 1;
+#if 0
+ ir_fprintf(stderr, "Edge Verifier: edge(%ld) %+F -> %+F recorded at src position %d, but src has arity %d\n",
+ edge_get_id(e), e->src, irn, e->pos, get_irn_arity(e->src));
+#endif
+ continue;
+ }
+
+ tgt = get_n(e->src, e->pos, w->kind);
+
+ if (irn != tgt) {
+ w->problem_found = 1;
+#if 0
+ ir_fprintf(stderr, "Edge Verifier: edge(%ld) %+F,%d (kind \"%s\") is no out edge of %+F but of %+F\n",
+ edge_get_id(e), e->src, e->pos, get_kind_str(w->kind), irn, tgt);
+#endif
+ }
}
}
-void edges_verify_kind(ir_graph *irg, ir_edge_kind_t kind)
+int edges_verify_kind(ir_graph *irg, ir_edge_kind_t kind)
{
struct build_walker w;
- set *edges = _get_irg_edge_info(irg, kind)->edges;
- ir_edge_t *e;
+ ir_edgeset_t *edges = &_get_irg_edge_info(irg, kind)->edges;
+ ir_edge_t *e;
+ ir_edgeset_iterator_t iter;
- w.irg = irg;
- w.kind = kind;
+ w.irg = irg;
+ w.kind = kind;
+ w.reachable = bitset_alloca(get_irg_last_idx(irg));
+ w.problem_found = 0;
/* Clear the present bit in all edges available. */
- for(e = set_first(edges); e; e = set_next(edges))
+ foreach_ir_edgeset(edges, e, iter) {
e->present = 0;
+ }
irg_walk_graph(irg, verify_set_presence, verify_list_presence, &w);
* These edges are superfluous and their presence in the
* edge set is wrong.
*/
- for(e = set_first(edges); e; e = set_next(edges)) {
- if(!e->invalid && !e->present)
- DBG((dbg, LEVEL_DEFAULT, "edge %+F,%d is superfluous\n", e->src, e->pos));
+ foreach_ir_edgeset(edges, e, iter) {
+ if (! e->invalid && ! e->present && bitset_is_set(w.reachable, get_irn_idx(e->src))) {
+ w.problem_found = 1;
+ ir_fprintf(stderr, "Edge Verifier: edge(%ld) %+F,%d is superfluous\n", edge_get_id(e), e->src, e->pos);
+ }
}
+
+ return w.problem_found;
}
-void init_edges(void)
-{
+#define IGNORE_NODE(irn) (is_Bad((irn)) || is_Block((irn)))
+
+/**
+ * Clear link field of all nodes.
+ */
+static void clear_links(ir_node *irn, void *env) {
+ struct build_walker *w = env;
+ bitset_t *bs;
+
+ if (IGNORE_NODE(irn)) {
+ set_irn_link(irn, NULL);
+ return;
+ }
+
+ bs = bitset_malloc(get_irg_last_idx(w->irg));
+ set_irn_link(irn, bs);
+}
+
+/**
+ * Increases count (stored in link field) for all operands of a node.
+ */
+static void count_user(ir_node *irn, void *env) {
+ int i;
+ int first;
+ (void) env;
+
+ first = -1;
+ for (i = get_irn_arity(irn) - 1; i >= first; --i) {
+ ir_node *op = get_irn_n(irn, i);
+ bitset_t *bs = get_irn_link(op);
+
+ if (bs)
+ bitset_set(bs, get_irn_idx(irn));
+ }
+}
+
+/**
+ * Verifies if collected count, number of edges in list and stored edge count are in sync.
+ */
+static void verify_edge_counter(ir_node *irn, void *env) {
+ struct build_walker *w = env;
+ bitset_t *bs;
+ int list_cnt;
+ int ref_cnt;
+ int edge_cnt;
+ unsigned long idx;
+ const struct list_head *head;
+ const struct list_head *pos;
+
+ if (IGNORE_NODE(irn))
+ return;
+
+ bs = get_irn_link(irn);
+ list_cnt = 0;
+ ref_cnt = 0;
+ edge_cnt = _get_irn_edge_info(irn, EDGE_KIND_NORMAL)->out_count;
+ head = _get_irn_outs_head(irn, EDGE_KIND_NORMAL);
+
+ /* We can iterate safely here, list heads have already been verified. */
+ list_for_each(pos, head) {
+ ++list_cnt;
+ }
+
+ /* check all nodes that reference us and count edges that point number
+ * of ins that actually point to us */
+ ref_cnt = 0;
+ bitset_foreach(bs, idx) {
+ int i, arity;
+ ir_node *src = get_idx_irn(w->irg, idx);
+
+ arity = get_irn_arity(src);
+ for (i = 0; i < arity; ++i) {
+ ir_node *in = get_irn_n(src, i);
+ if (in == irn)
+ ++ref_cnt;
+ }
+ }
+
+ if (edge_cnt != list_cnt) {
+ w->problem_found = 1;
+ ir_fprintf(stderr, "Edge Verifier: edge count is %d, but %d edge(s) are recorded in list at %+F\n",
+ edge_cnt, list_cnt, irn);
+ }
+
+ if (ref_cnt != list_cnt) {
+ w->problem_found = 1;
+ ir_fprintf(stderr, "Edge Verifier: %+F reachable by %d node(s), but the list contains %d edge(s)\n",
+ irn, ref_cnt, list_cnt);
+
+ /* Matze: buggy if a node has multiple ins pointing at irn */
+#if 0
+ list_for_each(pos, head) {
+ ir_edge_t *edge = list_entry(pos, ir_edge_t, list);
+ bitset_flip(bs, get_irn_idx(edge->src));
+ }
+
+ if (ref_cnt < list_cnt)
+ fprintf(stderr," following nodes are recorded in list, but not as user:\n");
+ else
+ fprintf(stderr," following nodes are user, but not recorded in list:\n");
+
+ fprintf(stderr," ");
+ bitset_foreach(bs, idx) {
+ ir_node *src = get_idx_irn(w->irg, idx);
+ ir_fprintf(stderr, " %+F", src);
+ }
+ fprintf(stderr, "\n");
+#endif
+ }
+
+ bitset_free(bs);
+}
+
+/**
+ * Verifies the out edges of an irg.
+ */
+int edges_verify(ir_graph *irg) {
+ struct build_walker w;
+ int problem_found = 0;
+
+ /* verify normal edges only */
+ problem_found = edges_verify_kind(irg, EDGE_KIND_NORMAL);
+
+ w.irg = irg;
+ w.kind = EDGE_KIND_NORMAL;
+ w.problem_found = 0;
+
+ /* verify counter */
+ irg_walk_anchors(irg, clear_links, count_user, &w);
+ irg_walk_anchors(irg, NULL, verify_edge_counter, &w);
+
+ return problem_found ? 1 : w.problem_found;
+}
+
+void init_edges(void) {
FIRM_DBG_REGISTER(dbg, DBG_EDGES);
/* firm_dbg_set_mask(dbg, -1); */
}
-void edges_activate(ir_graph *irg)
-{
+void edges_init_dbg(int do_dbg) {
+ edges_dbg = do_dbg;
+}
+
+void edges_activate(ir_graph *irg) {
edges_activate_kind(irg, EDGE_KIND_NORMAL);
edges_activate_kind(irg, EDGE_KIND_BLOCK);
+ if (get_irg_phase_state(irg) == phase_backend)
+ edges_activate_kind(irg, EDGE_KIND_DEP);
}
-void edges_deactivate(ir_graph *irg)
-{
- edges_deactivate_kind(irg, EDGE_KIND_NORMAL);
+void edges_deactivate(ir_graph *irg) {
+ if (get_irg_phase_state(irg) == phase_backend)
+ edges_deactivate_kind(irg, EDGE_KIND_DEP);
edges_deactivate_kind(irg, EDGE_KIND_BLOCK);
+ edges_deactivate_kind(irg, EDGE_KIND_NORMAL);
}
int edges_assure(ir_graph *irg)
{
- int activated = edges_activated(irg);
+ int activated = 0;
- if(!activated)
- edges_activate(irg);
+ if (edges_activated_kind(irg, EDGE_KIND_BLOCK)) {
+ activated = 1;
+ } else {
+ edges_activate_kind(irg, EDGE_KIND_BLOCK);
+ }
+ if (edges_activated_kind(irg, EDGE_KIND_NORMAL)) {
+ activated = 1;
+ } else {
+ edges_activate_kind(irg, EDGE_KIND_NORMAL);
+ }
return activated;
}
-void edges_node_deleted(ir_node *irn, ir_graph *irg)
-{
+int edges_assure_kind(ir_graph *irg, ir_edge_kind_t kind) {
+ int activated = edges_activated_kind(irg, kind);
+
+ if (!activated)
+ edges_activate_kind(irg, kind);
+
+ return activated;
+}
+
+void edges_node_deleted(ir_node *irn, ir_graph *irg) {
edges_node_deleted_kind(irn, EDGE_KIND_NORMAL, irg);
edges_node_deleted_kind(irn, EDGE_KIND_BLOCK, irg);
}
-const ir_edge_t *(get_irn_out_edge_first_kind)(const ir_node *irn, ir_edge_kind_t kind)
-{
+const ir_edge_t *(get_irn_out_edge_first_kind)(const ir_node *irn, ir_edge_kind_t kind) {
return _get_irn_out_edge_first_kind(irn, kind);
}
-const ir_edge_t *(get_irn_out_edge_next)(const ir_node *irn, const ir_edge_t *last)
-{
+const ir_edge_t *(get_irn_out_edge_next)(const ir_node *irn, const ir_edge_t *last) {
return _get_irn_out_edge_next(irn, last);
}
-ir_node *(get_edge_src_irn)(const ir_edge_t *edge)
-{
+ir_node *(get_edge_src_irn)(const ir_edge_t *edge) {
return _get_edge_src_irn(edge);
}
-int (get_edge_src_pos)(const ir_edge_t *edge)
-{
+int (get_edge_src_pos)(const ir_edge_t *edge) {
return _get_edge_src_pos(edge);
}
-int (get_irn_n_edges_kind)(const ir_node *irn, ir_edge_kind_t kind)
-{
+int (get_irn_n_edges_kind)(const ir_node *irn, ir_edge_kind_t kind) {
return _get_irn_n_edges_kind(irn, kind);
}
-void dump_all_out_edges(ir_node *irn)
-{
+void dump_all_out_edges(ir_node *irn) {
int i;
- for(i = 0; i < EDGE_KIND_LAST; ++i) {
+ for (i = 0; i < EDGE_KIND_LAST; ++i) {
const ir_edge_t *edge;
printf("kind \"%s\"\n", get_kind_str(i));
}
}
}
+
+static void irg_block_edges_walk2(ir_node *bl,
+ irg_walk_func *pre, irg_walk_func *post,
+ void *env) {
+ const ir_edge_t *edge, *next;
+
+ if (!Block_block_visited(bl)) {
+ mark_Block_block_visited(bl);
+
+ if (pre)
+ pre(bl, env);
+
+ foreach_out_edge_kind_safe(bl, edge, next, EDGE_KIND_BLOCK) {
+ /* find the corresponding successor block. */
+ ir_node *pred = get_edge_src_irn(edge);
+ irg_block_edges_walk2(pred, pre, post, env);
+ }
+
+ if (post)
+ post(bl, env);
+ }
+}
+
+void irg_block_edges_walk(ir_node *node,
+ irg_walk_func *pre, irg_walk_func *post,
+ void *env) {
+
+ assert(edges_activated(current_ir_graph));
+ assert(is_Block(node));
+
+ ir_reserve_resources(current_ir_graph, IR_RESOURCE_BLOCK_VISITED);
+
+ inc_irg_block_visited(current_ir_graph);
+ irg_block_edges_walk2(node, pre, post, env);
+
+ ir_free_resources(current_ir_graph, IR_RESOURCE_BLOCK_VISITED);
+}