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.

(cherry picked from commit 11041c3151e30d197d1c2774721db24332eeccef)

diff --git a/gcc/lto-streamer-out.c b/gcc/lto-streamer-out.c
index 4651d8e5c51dd700d169171f3fcc9a5722d019d8..35ed44d3096fd44be51121d8b7018ac24aac9586 100644 (file)
--- a/gcc/lto-streamer-out.c
+++ b/gcc/lto-streamer-out.c
@@ -1747,8 +1747,9 @@ 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)));
        }
       if (streamer_dump_file)
        {