X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fana%2Fdfs.c;h=091800bc4349d435d3116a378be5be3d3cce62d1;hb=00d3df180d69e4e3fd0b05de4d066667ca8c6e8e;hp=d8596c12ba37440614dce4f57e68173fdebff7c8;hpb=ca84eb318328b3bd580c7ce2591745f83c6605e0;p=libfirm

diff --git a/ir/ana/dfs.c b/ir/ana/dfs.c
index d8596c12b..091800bc4 100644
--- a/ir/ana/dfs.c
+++ b/ir/ana/dfs.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -21,28 +21,28 @@
  * @file    dfs.c
  * @author  Sebastian Hack
  * @date    20.04.2007
- * @version $Id$
- * @summary
+ * @brief
  *
  * Simple depth first search on CFGs.
  */
-#ifdef HAVE_CONFIG_H
 #include <config.h>
-#endif
 
 #include <stdlib.h>
 
+#define DISABLE_STATEV
+
 #include <assert.h>
-#include "irtools.h"
 #include "irprintf.h"
-#include "irdom.h"
+#include "irdom_t.h"
 #include "set.h"
+#include "statev_t.h"
 #include "dfs_t.h"
+#include "util.h"
 
 static int cmp_edge(const void *a, const void *b, size_t sz)
 {
-	const dfs_edge_t *p = a;
-	const dfs_edge_t *q = b;
+	const dfs_edge_t *p = (const dfs_edge_t*) a;
+	const dfs_edge_t *q = (const dfs_edge_t*) b;
 	(void) sz;
 
 	return !(p->src == q->src && p->tgt == q->tgt);
@@ -50,8 +50,8 @@ static int cmp_edge(const void *a, const void *b, size_t sz)
 
 static int cmp_node(const void *a, const void *b, size_t sz)
 {
-	const dfs_node_t *p = a;
-	const dfs_node_t *q = b;
+	const dfs_node_t *p = (const dfs_node_t*) a;
+	const dfs_node_t *q = (const dfs_node_t*) b;
 	(void) sz;
 
 	return p->node != q->node;
@@ -59,16 +59,16 @@ static int cmp_node(const void *a, const void *b, size_t sz)
 
 #define get_node(dfs, node) _dfs_get_node(dfs, node)
 
-static dfs_edge_t *get_edge(const dfs_t *self, void *src, void *tgt)
+static dfs_edge_t *get_edge(const dfs_t *self, const void *src, const void *tgt)
 {
-	unsigned hash = HASH_COMBINE(HASH_PTR(src), HASH_PTR(tgt));
+	unsigned hash = hash_combine(hash_ptr(src), hash_ptr(tgt));
 	dfs_edge_t templ;
 
 	templ.src = src;
 	templ.tgt = tgt;
-	templ.kind = -1;
+	templ.kind = (dfs_edge_kind_t) -1;
 
-	return set_insert(self->edges, &templ, sizeof(templ), hash);
+	return set_insert(dfs_edge_t, self->edges, &templ, sizeof(templ), hash);
 }
 
 static void dfs_perform(dfs_t *dfs, void *n, void *anc, int level)
@@ -87,7 +87,7 @@ static void dfs_perform(dfs_t *dfs, void *n, void *anc, int level)
 
 	dfs->graph_impl->grow_succs(dfs->graph, n, &dfs->obst);
 	obstack_ptr_grow(&dfs->obst, NULL);
-	succs = obstack_finish(&dfs->obst);
+	succs = (void**) obstack_finish(&dfs->obst);
 
 	for (iter = succs; *iter; ++iter) {
 		void *p = *iter;
@@ -113,24 +113,40 @@ static void dfs_perform(dfs_t *dfs, void *n, void *anc, int level)
 
 static void classify_edges(dfs_t *dfs)
 {
-	dfs_edge_t *edge;
+	stat_ev_cnt_decl(anc);
+	stat_ev_cnt_decl(back);
+	stat_ev_cnt_decl(fwd);
+	stat_ev_cnt_decl(cross);
 
-	foreach_set (dfs->edges, edge) {
+	foreach_set (dfs->edges, dfs_edge_t, edge) {
 		dfs_node_t *src = edge->s;
 		dfs_node_t *tgt = edge->t;
 
-		if (tgt->ancestor == src)
+		if (tgt->ancestor == src) {
+			stat_ev_cnt_inc(anc);
 			edge->kind = DFS_EDGE_ANC;
-		else if (_dfs_int_is_ancestor(tgt, src))
+		}
+		else if (_dfs_int_is_ancestor(tgt, src)) {
+			stat_ev_cnt_inc(back);
 			edge->kind = DFS_EDGE_BACK;
-		else if (_dfs_int_is_ancestor(src, tgt))
+		}
+		else if (_dfs_int_is_ancestor(src, tgt)) {
+			stat_ev_cnt_inc(fwd);
 			edge->kind = DFS_EDGE_FWD;
-		else
+		}
+		else {
+			stat_ev_cnt_inc(cross);
 			edge->kind = DFS_EDGE_CROSS;
+		}
 	}
+
+	stat_ev_cnt_done(anc,   "dfs_edge_anc");
+	stat_ev_cnt_done(back,  "dfs_edge_back");
+	stat_ev_cnt_done(fwd,   "dfs_edge_fwd");
+	stat_ev_cnt_done(cross, "dfs_edge_cross");
 }
 
-dfs_edge_kind_t dfs_get_edge_kind(const dfs_t *dfs, void *a, void *b)
+dfs_edge_kind_t dfs_get_edge_kind(const dfs_t *dfs, const void *a, const void *b)
 {
 	if (!dfs->edges_classified) {
 		dfs_t *urg = (dfs_t *) dfs;
@@ -142,8 +158,7 @@ dfs_edge_kind_t dfs_get_edge_kind(const dfs_t *dfs, void *a, void *b)
 
 dfs_t *dfs_new(const absgraph_t *graph_impl, void *graph_self)
 {
-	dfs_t *res = xmalloc(sizeof(res[0]));
-	dfs_node_t *node;
+	dfs_t *res = XMALLOC(dfs_t);
 
 	res->graph_impl = graph_impl;
 	res->graph      = graph_self;
@@ -157,20 +172,40 @@ dfs_t *dfs_new(const absgraph_t *graph_impl, void *graph_self)
 	obstack_init(&res->obst);
 
 	dfs_perform(res, graph_impl->get_root(graph_self), NULL, 0);
+
+	/* make sure the end node (which might not be accessible) has a number */
+	dfs_node_t *const node = get_node(res, graph_impl->get_end(graph_self));
+	if (!node->visited) {
+		node->visited     = 1;
+		node->node        = graph_impl->get_end(graph_self);
+		node->ancestor    = NULL;
+		node->pre_num     = res->pre_num++;
+		node->post_num    = res->post_num++;
+		node->max_pre_num = node->pre_num;
+		node->level       = 0;
+	}
+
 	classify_edges(res);
 
-	res->pre_order = xmalloc(res->pre_num * sizeof(res->pre_order));
-	res->post_order = xmalloc(res->pre_num * sizeof(res->post_order));
-	foreach_set (res->nodes, node) {
+	assert(res->pre_num == res->post_num);
+	res->pre_order  = XMALLOCN(dfs_node_t*, res->pre_num);
+	res->post_order = XMALLOCN(dfs_node_t*, res->post_num);
+	foreach_set (res->nodes, dfs_node_t, node) {
+		assert(node->pre_num < res->pre_num);
+		assert(node->post_num < res->post_num);
+
 		res->pre_order[node->pre_num] = node;
 		res->post_order[node->post_num] = node;
 	}
 
+	stat_ev_dbl("dfs_n_blocks", res->pre_num);
+
 	return res;
 }
 
 void dfs_free(dfs_t *dfs)
 {
+	obstack_free(&dfs->obst, NULL);
 	del_set(dfs->nodes);
 	del_set(dfs->edges);
 	xfree(dfs->pre_order);
@@ -185,7 +220,7 @@ static void dfs_dump_edge(const dfs_edge_t *edge, FILE *file)
 	const char *s, *style;
 	int weight;
 
-#define XXX(e)		case DFS_EDGE_ ## e: s = #e; break
+#define XXX(e)   case DFS_EDGE_ ## e: s = #e; break
 	switch (edge->kind) {
 		XXX(FWD);
 		XXX(CROSS);
@@ -212,13 +247,11 @@ static int node_level_cmp(const void *a, const void *b)
 
 void dfs_dump(const dfs_t *dfs, FILE *file)
 {
-	dfs_node_t **nodes = xmalloc(dfs->pre_num * sizeof(nodes[0]));
-	dfs_node_t *node;
-	dfs_edge_t *edge;
+	dfs_node_t **nodes = XMALLOCN(dfs_node_t*, dfs->pre_num);
 	int i, n = 0;
 
 	ir_fprintf(file, "digraph G {\nranksep=0.5\n");
-	foreach_set (dfs->nodes, node) {
+	foreach_set (dfs->nodes, dfs_node_t, node) {
 		nodes[n++] = node;
 	}
 
@@ -237,8 +270,8 @@ void dfs_dump(const dfs_t *dfs, FILE *file)
 	}
 
 	for (i = 0; i < n; ++i) {
-		dfs_node_t *node = nodes[i];
-		ir_fprintf(file, "\tn%d [label=\"%d\"]\n", node->pre_num, get_Block_dom_tree_pre_num(node->node));
+		dfs_node_t *const node = nodes[i];
+		ir_fprintf(file, "\tn%d [label=\"%d\"]\n", node->pre_num, get_Block_dom_tree_pre_num((ir_node*) node->node));
 #if 0
 		ir_fprintf(file, "\tn%d [shape=box,label=\"%+F\\l%d %d/%d %d\"];\n",
 				node->pre_num, node->node, get_Block_dom_tree_pre_num(node->node),
@@ -246,7 +279,7 @@ void dfs_dump(const dfs_t *dfs, FILE *file)
 #endif
 	}
 
-	foreach_set (dfs->edges, edge)
+	foreach_set (dfs->edges, dfs_edge_t, edge)
 		dfs_dump_edge(edge, file);
 
 	ir_fprintf(file, "}\n");