convert many if_marked htab to hash_table

ada/

	* gcc-interface/decl.c, gcc-interface/utils.c: replace htab with
	hash_table.

cp/

	* cp-objcp-common.c: Use hash_table instead of htab.

gcc/

	* config/i386/i386.c, function.c, trans-mem.c, tree-core.h,
	tree.c, tree.h, ubsan.c, varasm.c: Use hash_table instead of htab.

From-SVN: r217867

1 files changed, 22 insertions, 0 deletions

diff --git a/gcc/tree.h b/gcc/tree.h
index ed8fecd..7126dac 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -4402,6 +4402,28 @@ extern unsigned int tree_map_hash (const void *);
 extern unsigned int tree_decl_map_hash (const void *);
 #define tree_decl_map_marked_p tree_map_base_marked_p
 
+struct tree_decl_map_cache_hasher : ggc_cache_hasher<tree_decl_map *>
+{
+  static hashval_t hash (tree_decl_map *m) { return tree_decl_map_hash (m); }
+  static bool
+  equal (tree_decl_map *a, tree_decl_map *b)
+  {
+    return tree_decl_map_eq (a, b);
+  }
+
+  static void
+  handle_cache_entry (tree_decl_map *&m)
+  {
+    extern void gt_ggc_mx (tree_decl_map *&);
+    if (m == HTAB_EMPTY_ENTRY || m == HTAB_DELETED_ENTRY)
+      return;
+    else if (ggc_marked_p (m->base.from))
+      gt_ggc_mx (m);
+    else
+      m = static_cast<tree_decl_map *> (HTAB_DELETED_ENTRY);
+  }
+};
+
 #define tree_int_map_eq tree_map_base_eq
 #define tree_int_map_hash tree_map_base_hash
 #define tree_int_map_marked_p tree_map_base_marked_p