+/*
+ * 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.
+ */
+
/**
* Always available outs.
* @author Sebastian Hack
#endif
#include "irnode_t.h"
+#include "iropt_t.h"
+#include "iredgekinds.h"
#include "iredges_t.h"
#include "irgwalk.h"
#include "irdump_t.h"
#include "debug.h"
#include "set.h"
-static firm_dbg_module_t *dbg;
+/**
+* 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.
+*/
+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;
+} 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;
+}
+
+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 }
+};
+
+#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 get_n(irn, pos, kind) (edge_kind_info[kind].get_n(irn, pos))
+#define get_kind_str(kind) (edge_kind_info[kind].name)
-#if FIRM_EDGES_INPLACE
+DEBUG_ONLY(static firm_dbg_module_t *dbg;)
/**
* This flag is set to 1, if the edges get initialized for an irg.
/**
* Initialize the out information for a graph.
- * @note Dead node elim can call this on an already initialized graph.
+ * @note Dead node elimination can call this on an already initialized graph.
*/
-void edges_init_graph(ir_graph *irg)
+void edges_init_graph_kind(ir_graph *irg, ir_edge_kind_t kind)
{
- if(edges_activated(irg)) {
- irg_edge_info_t *info = _get_irg_edge_info(irg);
+ if(edges_activated_kind(irg, kind)) {
+ irg_edge_info_t *info = _get_irg_edge_info(irg, kind);
int amount = 2048;
edges_used = 1;
-
if(info->edges) {
amount = set_count(info->edges);
del_set(info->edges);
}
-
info->edges = new_set(edge_cmp, amount);
}
}
-#define EDGE_SIZE(src) \
- (edges_private_size + (is_Block(src) ? sizeof(ir_block_edge_t) : sizeof(ir_edge_t)))
-
-
/**
* Get the edge object of an outgoing edge at a node.
* @param irg The graph, the node is in.
* @return The corresponding edge object or NULL,
* if no such edge exists.
*/
-const ir_edge_t *get_irn_edge(ir_graph *irg, const ir_node *src, int pos)
+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(irg)) {
- irg_edge_info_t *info = _get_irg_edge_info(irg);
- size_t size = EDGE_SIZE(src);
- ir_edge_t *templ = alloca(size);
-
- memset(templ, 0, size);
- templ->src = (ir_node *) src;
- templ->pos = pos;
- return set_find(info->edges, templ, size, edge_hash(templ));
+ if(edges_activated_kind(irg, kind)) {
+ irg_edge_info_t *info = _get_irg_edge_info(irg, kind);
+ ir_edge_t key;
+
+ key.src = (ir_node *) src;
+ key.pos = pos;
+ return set_find(info->edges, &key, sizeof(key), edge_hash(&key));
}
return NULL;
}
-void edges_notify_edge(ir_node *src, int pos, ir_node *tgt, ir_node *old_tgt, ir_graph *irg)
+/**
+ * Change the out count
+ */
+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;
+}
+
+/* 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)
{
const char *msg = "";
- if(!edges_activated(irg))
+ if(!edges_activated_kind(irg, kind))
return;
-#if 0
- assert(node_is_in_irgs_storage(irg, src) && "source not in irg");
-#endif
-
/*
* Only do something, if the old and new target differ.
*/
if(tgt != old_tgt) {
- int is_block_edge = is_Block(src);
- set *edges = _get_irg_edge_info(irg)->edges;
+ 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;
- /*
- * This is scray, but:
- * If two entries in a set do not have the same size, they are
- * treated as unequal, ignoring the comparison function.
- * So, edges from blocks have extra storage (they are
- * ir_block_edge_t's).
- *
- * Also add the amount of registered private data to the
- * size of the edge.
- */
- size_t size = EDGE_SIZE(src);
- ir_edge_t *templ = alloca(size);
-
/* Initialize the edge template to search in the set. */
- memset(templ, 0, size);
-#ifdef DEBUG_libfirm
- templ->src_nr = get_irn_node_nr(src);
-#endif
- templ->src = src;
- templ->pos = pos;
+ 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) {
+ if (tgt == NULL) {
/* search the edge in the set. */
- edge = set_find(edges, templ, size, edge_hash(templ));
+ edge = set_find(edges, templ, sizeof(templ[0]), edge_hash(templ));
/* mark the edge invalid if it was found */
if(edge) {
edge->invalid = 1;
edge->pos = -2;
edge->src = NULL;
-
- /*
- * If the edge is a cf edge, we delete it also
- * from the list of all block successor edges.
- */
- if(is_block_edge)
- list_del(&block_edge->succ_list);
}
/* If the edge was not found issue a warning on the debug stream */
* NULL).
*/
else {
- struct list_head *head = _get_irn_outs_head(tgt);
+ struct list_head *head = _get_irn_outs_head(tgt, kind);
- /*
- * The list head in the block of the edges target.
- * Therein all control flow edges directed at that block
- * are recorded.
- */
- struct list_head *succ_head =
- is_block_edge ? _get_block_succ_head(get_nodes_block(tgt)) : NULL;
-
- ir_block_edge_t *block_edge;
-
-#if 0
- if(!node_is_in_irgs_storage(irg, tgt))
- return;
-#endif
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, size, edge_hash(templ));
- block_edge = (ir_block_edge_t *) edge;
+ edge = set_insert(edges, templ, sizeof(templ[0]), edge_hash(templ));
#ifdef DEBUG_libfirm
assert(!edge->invalid && "Invalid edge encountered");
/* If the old target is not null, the edge is moved. */
if(old_tgt) {
msg = "redirecting";
- list_move(&edge->list, head);
- /* If the edge is a cf edge, move it from the successor list. */
- if(is_block_edge)
- list_move(&block_edge->succ_list, succ_head);
-
- _get_irn_edge_info(old_tgt)->out_count -= 1;
+ list_move(&edge->list, head);
+ edge_change_cnt(old_tgt, kind, -1);
}
/* The old target was null, thus, the edge is newly created. */
else {
msg = "adding";
list_add(&edge->list, head);
-
- /*
- * If the edge is cf edge, enter it into the successor list
- * of the target node's block.
- */
- if(is_block_edge)
- list_add(&block_edge->succ_list, succ_head);
}
- _get_irn_edge_info(tgt)->out_count += 1;
+ edge_change_cnt(tgt, kind, +1);
} /* else */
}
/* If the target and the old target are equal, nothing is done. */
- DBG((dbg, LEVEL_5, "announce out edge: %n[%p] %d-> %n[%p](%n[%p]): %s\n",
- src, src, pos, tgt, tgt, old_tgt, old_tgt, msg));
+ DBG((dbg, LEVEL_5, "announce out edge: %+F %d-> %+F(%+F): %s\n", src, pos, tgt, old_tgt, msg));
}
-void edges_node_deleted(ir_node *old, ir_graph *irg)
+void edges_notify_edge(ir_node *src, int pos, ir_node *tgt, ir_node *old_tgt, ir_graph *irg)
{
- if(edges_activated(irg)) {
- int not_a_block = !is_Block(old);
- ir_edge_t templ;
+ edges_notify_edge_kind(src, pos, tgt, old_tgt, EDGE_KIND_NORMAL, irg);
+ if(is_Block(src)) {
+ /* do not use get_nodes_block() here, it fails when running unpinned */
+ ir_node *bl_tgt = tgt ? get_irn_n(skip_Proj(tgt), -1) : NULL;
+ // ir_node *bl_old = old_tgt ? old_tgt : NULL;
+ ir_node *bl_old = old_tgt ? get_irn_n(skip_Proj(old_tgt), -1) : NULL;
+ 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)
+{
+ if(edges_activated_kind(irg, kind)) {
int i, n;
- templ.src = old;
- DBG((dbg, LEVEL_5, "node deleted: %n\n", old));
+ DBG((dbg, LEVEL_5, "node deleted (kind: %s): %+F\n", get_kind_str(kind), old));
- /* Change to get_irn_n */
- for(i = -not_a_block, n = get_irn_arity(old); i < n; ++i) {
- ir_node *old_tgt = get_irn_n(old, i);
- DBG((dbg, LEVEL_5, "\tdelete to old target %n\n", old_tgt));
- edges_notify_edge(old, i, NULL, old_tgt, irg);
+ 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);
}
-
}
}
-void edges_invalidate(ir_node *irn, ir_graph *irg)
-{
- edges_node_deleted(irn, irg);
-}
+struct build_walker {
+ ir_graph *irg;
+ ir_edge_kind_t kind;
+};
-static void build_edges_walker(ir_node *irn, void *data)
-{
- ir_graph *irg = data;
- int not_a_block = !is_Block(irn);
+/**
+ * Post-Walker: notify all edges
+ */
+static void build_edges_walker(ir_node *irn, void *data) {
+ struct build_walker *w = data;
int i, n;
- for(i = -not_a_block, n = get_irn_arity(irn); i < n; ++i)
- edges_notify_edge(irn, i, get_irn_n(irn, i), NULL, irg);
+ foreach_tgt(irn, i, n, w->kind)
+ edges_notify_edge_kind(irn, i, get_n(irn, i, w->kind), NULL, w->kind, w->irg);
}
-static void init_lh_walker(ir_node *irn, void *data)
-{
- INIT_LIST_HEAD(_get_irn_outs_head(irn));
- if(is_Block(irn))
- INIT_LIST_HEAD(_get_block_succ_head(irn));
+/**
+ * Pre-Walker: initializes the list-heads and set the out-count
+ * 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;
}
-void edges_activate(ir_graph *irg)
+/**
+ * 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)) {
+ mark_irn_visited(irn);
+ init_lh_walker(irn, data);
+ }
+}
+
+/*
+ * Build the initial edge set.
+ * Beware, this is not a simple task because it suffers from two
+ * difficulties:
+ * - the anchor set allows access to Nodes that may not be reachable from
+ * the End node
+ * - the identities add nodes to the "root set" that are not yet reachable
+ * from End. However, after some transformations, the CSE may revival these
+ * nodes
+ *
+ * These problems can be fixed using different strategies:
+ * - Add an age flag to every node. Whenever the edge of a node is older
+ * then the current edge, invalidate the edges of this node.
+ * While this would help for revivaled nodes, it increases memory and runtime.
+ * - Delete the identities set.
+ * Solves the revival problem, but may increase the memory consumption, as
+ * nodes cannot be revivaled at all.
+ * - Manually iterate over the identities root set. This did not consume more memory
+ * but increase the computation time because the |identities| >= |V|
+ *
+ * Currently, we use the last option.
+ */
+void edges_activate_kind(ir_graph *irg, ir_edge_kind_t kind)
{
- irg_edge_info_t *info = _get_irg_edge_info(irg);
+ struct build_walker w;
+ irg_edge_info_t *info = _get_irg_edge_info(irg, kind);
+
+ w.irg = irg;
+ w.kind = kind;
info->activated = 1;
- edges_init_graph(irg);
- irg_walk_graph(irg, init_lh_walker, build_edges_walker, irg);
+ 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);
}
-void edges_deactivate(ir_graph *irg)
+void edges_deactivate_kind(ir_graph *irg, ir_edge_kind_t kind)
{
- irg_edge_info_t *info = _get_irg_edge_info(irg);
+ irg_edge_info_t *info = _get_irg_edge_info(irg, kind);
info->activated = 0;
- if(info->edges) {
+ if (info->edges) {
del_set(info->edges);
- info->edges = NULL;
- }
+ info->edges = NULL;
+ }
}
-int (edges_activated)(const ir_graph *irg)
+int (edges_activated_kind)(const ir_graph *irg, ir_edge_kind_t kind)
{
- return _edges_activated(irg);
+ return _edges_activated_kind(irg, kind);
}
/**
* Reroute all use-edges from a node to another.
* @param from The node whose use-edges shall be withdrawn.
- * @param to The node to which all the use-edges of @p from shall be
- * sent to.
+ * @param to The node to which all the use-edges of @p from shall be
+ * sent to.
+ * @param irg The graph.
*/
-void edges_reroute(ir_node *from, ir_node *to, ir_graph *irg)
+void edges_reroute_kind(ir_node *from, ir_node *to, ir_edge_kind_t kind, ir_graph *irg)
{
- if(edges_activated(irg)) {
- struct list_head *head = _get_irn_outs_head(from);
+ set_edge_func_t *set_edge = edge_kind_info[kind].set_edge;
- DBG((dbg, LEVEL_5,
- "reroute from %n to %n\n", from, to));
+ if(set_edge && edges_activated_kind(irg, kind)) {
+ struct list_head *head = _get_irn_outs_head(from, kind);
+
+ DBG((dbg, LEVEL_5, "reroute from %+F to %+F\n", from, to));
while(head != head->next) {
ir_edge_t *edge = list_entry(head->next, ir_edge_t, list);
- // DBG((dbg, LEVEL_5, "\t%n %d\n", edge->src, edge->pos));
assert(edge->pos >= -1);
- set_irn_n(edge->src, edge->pos, to);
+ set_edge(edge->src, edge->pos, to);
}
}
}
static void verify_set_presence(ir_node *irn, void *data)
{
- ir_graph *irg = data;
- set *edges = _get_irg_edge_info(irg)->edges;
- int not_a_block = !is_Block(irn);
+ struct build_walker *w = data;
+ set *edges = _get_irg_edge_info(w->irg, w->kind)->edges;
+ int not_a_block = !is_Block(irn);
int i, n;
- for(i = 0, n = get_irn_arity(irn) + not_a_block; i < n; ++i) {
- ir_block_edge_t space;
- ir_edge_t *templ = (ir_edge_t *) &space;
- ir_edge_t *e;
- size_t size = not_a_block ? sizeof(ir_edge_t) : sizeof(ir_block_edge_t);
+ foreach_tgt(irn, i, n, w->kind) {
+ ir_edge_t templ, *e;
- templ->src = irn;
- templ->pos = i - not_a_block;
+ templ.src = irn;
+ templ.pos = i;
- e = set_find(edges, templ, size, edge_hash(templ));
+ e = set_find(edges, &templ, sizeof(templ), edge_hash(&templ));
if(e != NULL)
e->present = 1;
else
- DBG((dbg, LEVEL_DEFAULT, "edge %n,%d is missing\n", irn, templ->pos));
+ DBG((dbg, LEVEL_DEFAULT, "edge %+F,%d (kind: \"%s\") is missing\n", irn, i, get_kind_str(w->kind)));
}
}
static void verify_list_presence(ir_node *irn, void *data)
{
+ struct build_walker *w = data;
const ir_edge_t *e;
- foreach_out_edge(irn, e) {
- ir_node *tgt = get_irn_n(e->src, e->pos);
+ 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 %n,%d is no out edge of %n but of %n\n",
- e->src, e->pos, 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));
}
-
}
-void edges_verify(ir_graph *irg)
+void edges_verify_kind(ir_graph *irg, ir_edge_kind_t kind)
{
- set *edges = _get_irg_edge_info(irg)->edges;
+ struct build_walker w;
+ set *edges = _get_irg_edge_info(irg, kind)->edges;
ir_edge_t *e;
+ w.irg = irg;
+ w.kind = kind;
+
/* Clear the present bit in all edges available. */
for(e = set_first(edges); e; e = set_next(edges))
e->present = 0;
- irg_walk_graph(irg, verify_set_presence, verify_list_presence, irg);
+ irg_walk_graph(irg, verify_set_presence, verify_list_presence, &w);
/*
* Dump all edges which are not invalid and not present.
*/
for(e = set_first(edges); e; e = set_next(edges)) {
if(!e->invalid && !e->present)
- DBG((dbg, LEVEL_DEFAULT, "edge %n,%d is superfluous\n", e->src, e->pos));
+ DBG((dbg, LEVEL_DEFAULT, "edge %+F,%d is superfluous\n", e->src, e->pos));
}
}
/* firm_dbg_set_mask(dbg, -1); */
}
+void edges_activate(ir_graph *irg)
+{
+ edges_activate_kind(irg, EDGE_KIND_NORMAL);
+ edges_activate_kind(irg, EDGE_KIND_BLOCK);
+}
+
+void edges_deactivate(ir_graph *irg)
+{
+ edges_deactivate_kind(irg, EDGE_KIND_NORMAL);
+ edges_deactivate_kind(irg, EDGE_KIND_BLOCK);
+}
-const ir_edge_t *(get_irn_out_edge_first)(const ir_node *irn)
+int edges_assure(ir_graph *irg)
{
- return _get_irn_out_edge_first(irn);
+ int activated = edges_activated(irg);
+
+ if(!activated)
+ edges_activate(irg);
+
+ 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)
+{
+ 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)
return _get_edge_src_pos(edge);
}
-int (get_irn_n_edges)(const ir_node *irn)
+int (get_irn_n_edges_kind)(const ir_node *irn, ir_edge_kind_t kind)
{
- return _get_irn_n_edges(irn);
+ return _get_irn_n_edges_kind(irn, kind);
}
+void dump_all_out_edges(ir_node *irn)
+{
+ int i;
+ for(i = 0; i < EDGE_KIND_LAST; ++i) {
+ const ir_edge_t *edge;
-#endif /* FIRM_EDGES_INPLACE */
+ printf("kind \"%s\"\n", get_kind_str(i));
+ foreach_out_edge_kind(irn, edge, i) {
+ ir_printf("\t%+F(%d)\n", edge->src, edge->pos);
+ }
+ }
+}
projects / libfirm / blobdiff