Fix streamer desynchornization caused by streamer debugging patch

it turns out I lost one hunk in the patch disabling extra streaming
which causes streamer to go out of sync in the case non-trivial scc
containing the node being streamed appears in local stream (which seems
quite rare since it does not happen during bootstrap).

2020-05-29  Jan Hubicka  <hubicka@ucw.cz>

	PR lto/95362
	* lto-streamer-out.c (lto_output_tree): Disable redundant streaming.

diff --git a/gcc/lto-streamer-out.c b/gcc/lto-streamer-out.c
index 288e3c0f4c6f1643343a385dc30df98e74e7d33a..dfd32ece4bd18240067d41f954bde4c2ab8f4f9e 100644 (file)
--- a/gcc/lto-streamer-out.c
+++ b/gcc/lto-streamer-out.c
@@ -1791,8 +1791,9 @@ lto_output_tree (struct output_block *ob, tree expr,
            }
          streamer_write_record_start (ob, LTO_tree_pickle_reference);
          streamer_write_uhwi (ob, ix);
-         streamer_write_enum (ob->main_stream, LTO_tags, LTO_NUM_TAGS,
-                              lto_tree_code_to_tag (TREE_CODE (expr)));
+         if (streamer_debugging)
+           streamer_write_enum (ob->main_stream, LTO_tags, LTO_NUM_TAGS,
+                                lto_tree_code_to_tag (TREE_CODE (expr)));
        }
       in_dfs_walk = false;
       lto_stats.num_pickle_refs_output++;