tree.h (TREE_SET_PERMANENT): New macro.

	* tree.h (TREE_SET_PERMANENT): New macro.  Document conditions
	under which TREE_PERMANENT will be set.
	* tree.c (make_node, copy_node, make_tree_vec, tree_cons,
	build1): Use TREE_SET_PERMANENT.
	* print-tree.c (print_node): Don't report value of
	TREE_PERMANENT if ggc_p is true.

	* c-common.c (c_get_alias_set): Don't use TREE_PERMANENT to
	decide whether to give a type a new alias set.
	* objc/objc-act.c (build_objc_string_object): Never copy the string.
	* tree.c (make_node): Set DECL_IN_SYSTEM_HEADER irrespective
	of value of 'obstack'.

	* f/com.c (ffecom_type_permanent_copy_): Delete unused function.
        (finish_decl): Don't change TREE_PERMANENT (DECL_INITIAL (decl)).

From-SVN: r32128

1 files changed, 3 insertions, 12 deletions

diff --git a/gcc/c-common.c b/gcc/c-common.c
index 815c8e1..0a7db5c 100644
--- a/gcc/c-common.c
+++ b/gcc/c-common.c
@@ -3490,18 +3490,9 @@ c_get_alias_set (t)
     }
 
   if (!TYPE_ALIAS_SET_KNOWN_P (type))
-    {
-      /* Types that are not global ('permanent') are not
-	 placed in the type hash table.  Thus, there can be multiple
-	 copies of identical types in local scopes.  In the long run,
-	 all types should be permanent.  */
-      if (! TREE_PERMANENT (type))
-	TYPE_ALIAS_SET (type) = 0;
-      else
-	/* TYPE is something we haven't seen before.  Put it in a new
-	   alias set.  */
-	TYPE_ALIAS_SET (type) = new_alias_set ();
-    }
+    /* TYPE is something we haven't seen before.  Put it in a new
+       alias set.  */
+    TYPE_ALIAS_SET (type) = new_alias_set ();
 
   return TYPE_ALIAS_SET (type);
 }