Simplify streaming of tree references

	* lto-streamer-in.c (stream_read_tree_ref): Simplify streaming of
	references.
	* lto-streamer-out.c (stream_write_tree_ref): Likewise.

diff --git a/gcc/lto-streamer-in.c b/gcc/lto-streamer-in.c
index 5eaba7d16d4343c2d5881718d6f0a8698940b8ae..15bfb6141639381f1a99f62bc245921153004016 100644 (file)
--- a/gcc/lto-streamer-in.c
+++ b/gcc/lto-streamer-in.c
@@ -1501,20 +1501,22 @@ lto_input_scc (class lto_input_block *ib, class data_in *data_in,
 tree
 stream_read_tree_ref (lto_input_block *ib, data_in *data_in)
 {
-  unsigned ix = streamer_read_uhwi (ib);
-  tree ret;
+  int ix = streamer_read_hwi (ib);
   if (!ix)
     return NULL_TREE;
-  else if (ix < LTO_NUM_TAGS)
-    ret = lto_input_tree_ref (ib, data_in, cfun, (LTO_tags)ix);
+  if (ix > 0)
+    return streamer_tree_cache_get_tree (data_in->reader_cache, ix - 1);
+
+  ix = -ix - 1;
+  int id = ix & 1;
+  ix /= 2;
+
+  tree ret;
+  if (!id)
+    ret = (*data_in->file_data->current_decl_state
+          ->streams[LTO_DECL_STREAM])[ix];
   else
-    ret = streamer_tree_cache_get_tree (data_in->reader_cache,
-                                       ix - LTO_NUM_TAGS);
-  if (ret && streamer_debugging)
-    {
-      enum tree_code c = (enum tree_code)streamer_read_uhwi (ib);
-      gcc_assert (c == TREE_CODE (ret));
-    }
+    ret = (*SSANAMES (cfun))[ix];
   return ret;
 }
 

diff --git a/gcc/lto-streamer-out.c b/gcc/lto-streamer-out.c
index dfc4603d7aea73f0970626d20fa1ba08a658b469..f71d3f816624e076a351d6407f9421ed52e58529 100644 (file)
--- a/gcc/lto-streamer-out.c
+++ b/gcc/lto-streamer-out.c
@@ -400,15 +400,19 @@ stream_write_tree_ref (struct output_block *ob, tree t)
       unsigned int ix;
       bool existed_p = streamer_tree_cache_lookup (ob->writer_cache, t, &ix);
       if (existed_p)
-       streamer_write_uhwi (ob, ix + LTO_NUM_TAGS);
+       streamer_write_hwi (ob, ix + 1);
       else
        {
          enum LTO_tags tag;
          unsigned ix;
+         int id = 0;
 
          lto_indexable_tree_ref (ob, t, &tag, &ix);
-         streamer_write_uhwi (ob, tag);
-         streamer_write_uhwi (ob, ix);
+         if (tag == LTO_ssa_name_ref)
+           id = 1;
+         else
+           gcc_checking_assert (tag == LTO_global_stream_ref);
+         streamer_write_hwi (ob, -(int)(ix * 2 + id + 1));
        }
       if (streamer_debugging)
        streamer_write_uhwi (ob, TREE_CODE (t));