c-parser.c (c_parser_cast_expression): Only insert casts into hash table if pointer.

        PR/21391
        * c-parser.c (c_parser_cast_expression): Only insert casts into
        hash table if pointer.
        * function.c (used_types_insert_helper): Rename from
        used_types_insert.
        (used_types_insert): Call used_types_insert_helper.
        * function.h (used_types_insert): Accept only one argument.
        * cp/typeck.c (build_static_cast_1): Save casted types in used types
        hash table.
        (build_reinterpret_cast_1): Same.
        * cp/rtti.c (build_dynamic_cast_1): Same.
        * testsuite/g++.dg/other/unused1.C: New.

From-SVN: r113561

1 files changed, 18 insertions, 7 deletions

diff --git a/gcc/function.c b/gcc/function.c
index cc50f50..bb64801 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -5590,23 +5590,34 @@ rest_of_handle_check_leaf_regs (void)
   return 0;
 }
 
-/* Insert a type into the used types hash table.  */
-void
-used_types_insert (tree t, struct function *func)
+/* Insert a TYPE into the used types hash table of CFUN.  */
+static void
+used_types_insert_helper (tree type, struct function *func)
 {
-  if (t != NULL && func != NULL)
+  if (type != NULL && func != NULL)
     {
       void **slot;
 
       if (func->used_types_hash == NULL)
 	func->used_types_hash = htab_create_ggc (37, htab_hash_pointer,
-					     htab_eq_pointer, NULL);
-      slot = htab_find_slot (func->used_types_hash, t, INSERT);
+						 htab_eq_pointer, NULL);
+      slot = htab_find_slot (func->used_types_hash, type, INSERT);
       if (*slot == NULL)
-	*slot = t;
+	*slot = type;
     }
 }
 
+/* Given a type, insert it into the used hash table in cfun.  */
+void
+used_types_insert (tree t)
+{
+  while (POINTER_TYPE_P (t) || TREE_CODE (t) == ARRAY_TYPE)
+    t = TREE_TYPE (t);
+  t = TYPE_MAIN_VARIANT (t);
+  if (debug_info_level > DINFO_LEVEL_NONE)
+    used_types_insert_helper (t, cfun);
+}
+
 struct tree_opt_pass pass_leaf_regs =
 {
   NULL,                                 /* name */