lto-streamer-out.c (DFS::DFS_write_tree_body): Do not stream DECL_FCONTEXT

	* lto-streamer-out.c (DFS::DFS_write_tree_body): Do not stream
	DECL_FCONTEXT
	(hash_tree): Do not hash DECL_FCONTEXT
	* tree-streamer-in.c (lto_input_ts_field_decl_tree_pointers):
	Do not stream DECL_FCONTEXT.
	* tree-streamer-out.c (write_ts_field_decl_tree_pointers): Likewise.
	* tree.c (free_lang_data_in_decl): Free DECL_FCONTEXT.

From-SVN: r262585

gcc/ChangeLog

+2018-07-12  Jan Hubicka  <hubicka@ucw.cz>
+
+	* lto-streamer-out.c (DFS::DFS_write_tree_body): Do not stream
+	DECL_FCONTEXT
+	(hash_tree): Do not hash DECL_FCONTEXT
+	* tree-streamer-in.c (lto_input_ts_field_decl_tree_pointers):
+	Do not stream DECL_FCONTEXT.
+	* tree-streamer-out.c (write_ts_field_decl_tree_pointers): Likewise.
+	* tree.c (free_lang_data_in_decl): Free DECL_FCONTEXT.
+
 2018-07-12  Richard Biener  <rguenther@suse.de>
 
 	PR debug/86462

gcc/lto-streamer-out.c

@@ -832,7 +832,7 @@ DFS::DFS_write_tree_body (struct output_block *ob,
       DFS_follow_tree_edge (DECL_BIT_FIELD_TYPE (expr));
       DFS_follow_tree_edge (DECL_BIT_FIELD_REPRESENTATIVE (expr));
       DFS_follow_tree_edge (DECL_FIELD_BIT_OFFSET (expr));
-      DFS_follow_tree_edge (DECL_FCONTEXT (expr));
+      gcc_checking_assert (!DECL_FCONTEXT (expr));
     }
 
   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
@@ -1249,7 +1249,6 @@ hash_tree (struct streamer_tree_cache_d *cache, hash_map<tree, hashval_t> *map,
       visit (DECL_BIT_FIELD_TYPE (t));
       visit (DECL_BIT_FIELD_REPRESENTATIVE (t));
       visit (DECL_FIELD_BIT_OFFSET (t));
-      visit (DECL_FCONTEXT (t));
     }
 
   if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))

gcc/tree-streamer-in.c

@@ -758,7 +758,6 @@ lto_input_ts_field_decl_tree_pointers (struct lto_input_block *ib,
   DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in);
   DECL_BIT_FIELD_REPRESENTATIVE (expr) = stream_read_tree (ib, data_in);
   DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree (ib, data_in);
-  DECL_FCONTEXT (expr) = stream_read_tree (ib, data_in);
 }
 
 

gcc/tree-streamer-out.c

@@ -646,7 +646,6 @@ write_ts_field_decl_tree_pointers (struct output_block *ob, tree expr,
   stream_write_tree (ob, DECL_BIT_FIELD_TYPE (expr), ref_p);
   stream_write_tree (ob, DECL_BIT_FIELD_REPRESENTATIVE (expr), ref_p);
   stream_write_tree (ob, DECL_FIELD_BIT_OFFSET (expr), ref_p);
-  stream_write_tree (ob, DECL_FCONTEXT (expr), ref_p);
 }
 
 

gcc/tree.c

@@ -5280,6 +5280,7 @@ free_lang_data_in_decl (tree decl)
   free_lang_data_in_one_sizepos (&DECL_SIZE_UNIT (decl));
   if (TREE_CODE (decl) == FIELD_DECL)
     {
+      DECL_FCONTEXT (decl) = NULL;
       free_lang_data_in_one_sizepos (&DECL_FIELD_OFFSET (decl));
       if (TREE_CODE (DECL_CONTEXT (decl)) == QUAL_UNION_TYPE)
 	DECL_QUALIFIER (decl) = NULL_TREE;