lto-streamer.c (lto_streamer_cache_insert_1, [...]): Use pointer map instead of hashtable.

	* lto-streamer.c (lto_streamer_cache_insert_1,
	lto_streamer_cache_lookup, lto_streamer_cache_create,
	lto_streamer_cache_delete): Use pointer map instead of hashtable.
	* lto-streamer.h (lto_streamer_cache_d): Turn node_map into pointer_map.

From-SVN: r173259

gcc/ChangeLog

+2011-05-02   Jan Hubicka  <jh@suse.cz>
+
+	* lto-streamer.c (lto_streamer_cache_insert_1,
+	lto_streamer_cache_lookup, lto_streamer_cache_create,
+	lto_streamer_cache_delete): Use pointer map instead of hashtable.
+	* lto-streamer.h (lto_streamer_cache_d): Turn node_map into pointer_map.
+
 2011-05-02  Joseph Myers  <joseph@codesourcery.com>
 
 	* config/m68k/genopt.sh, config/m68k/m68k-isas.def,

gcc/lto-streamer.c

@@ -348,26 +348,20 @@ lto_streamer_cache_insert_1 (struct lto_streamer_cache_d *cache,
 			     bool insert_at_next_slot_p)
 {
   void **slot;
-  struct tree_int_map d_entry, *entry;
   unsigned ix;
   bool existed_p;
 
   gcc_assert (t);
 
-  d_entry.base.from = t;
-  slot = htab_find_slot (cache->node_map, &d_entry, INSERT);
-  if (*slot == NULL)
+  slot = pointer_map_insert (cache->node_map, t);
+  if (!*slot)
     {
       /* Determine the next slot to use in the cache.  */
       if (insert_at_next_slot_p)
 	ix = VEC_length (tree, cache->nodes);
       else
 	ix = *ix_p;
-
-      entry = (struct tree_int_map *)pool_alloc (cache->node_map_entries);
-      entry->base.from = t;
-      entry->to = ix;
-      *slot = entry;
+       *slot = (void *)(size_t) (ix + 1);
 
       lto_streamer_cache_add_to_node_array (cache, ix, t);
 
@@ -376,8 +370,7 @@ lto_streamer_cache_insert_1 (struct lto_streamer_cache_d *cache,
     }
   else
     {
-      entry = (struct tree_int_map *) *slot;
-      ix = entry->to;
+      ix = (size_t) *slot - 1;
 
       if (!insert_at_next_slot_p && ix != *ix_p)
 	{
@@ -442,14 +435,12 @@ lto_streamer_cache_lookup (struct lto_streamer_cache_d *cache, tree t,
 			   unsigned *ix_p)
 {
   void **slot;
-  struct tree_int_map d_slot;
   bool retval;
   unsigned ix;
 
   gcc_assert (t);
 
-  d_slot.base.from = t;
-  slot = htab_find_slot (cache->node_map, &d_slot, NO_INSERT);
+  slot = pointer_map_contains  (cache->node_map, t);
   if (slot == NULL)
     {
       retval = false;
@@ -458,7 +449,7 @@ lto_streamer_cache_lookup (struct lto_streamer_cache_d *cache, tree t,
   else
     {
       retval = true;
-      ix = ((struct tree_int_map *) *slot)->to;
+      ix = (size_t) *slot - 1;
     }
 
   if (ix_p)
@@ -608,11 +599,7 @@ lto_streamer_cache_create (void)
 
   cache = XCNEW (struct lto_streamer_cache_d);
 
-  cache->node_map = htab_create (101, tree_int_map_hash, tree_int_map_eq, NULL);
-
-  cache->node_map_entries = create_alloc_pool ("node map",
-					       sizeof (struct tree_int_map),
-					       100);
+  cache->node_map = pointer_map_create ();
 
   /* Load all the well-known tree nodes that are always created by
      the compiler on startup.  This prevents writing them out
@@ -636,8 +623,7 @@ lto_streamer_cache_delete (struct lto_streamer_cache_d *c)
   if (c == NULL)
     return;
 
-  htab_delete (c->node_map);
-  free_alloc_pool (c->node_map_entries);
+  pointer_map_destroy (c->node_map);
   VEC_free (tree, heap, c->nodes);
   free (c);
 }

gcc/lto-streamer.h

@@ -346,10 +346,7 @@ typedef void (lto_free_section_data_f) (struct lto_file_decl_data *,
 struct lto_streamer_cache_d
 {
   /* The mapping between tree nodes and slots into the nodes array.  */
-  htab_t node_map;
-
-  /* Node map to store entries into.  */
-  alloc_pool node_map_entries;
+  struct pointer_map_t *node_map;
 
   /* The nodes pickled so far.  */
   VEC(tree,heap) *nodes;