PR c++/12909

	* lto-streamer.h (LTO_tags): Add LTO_var_decl_alias.
	* lto-streamer-in.c (lto_input_tree): Read it.
	* lto-streamer-out.c (output_unreferenced_globals): Write it.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@157204 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 11 insertions, 0 deletions

diff --git a/gcc/lto-streamer-in.c b/gcc/lto-streamer-in.c
index 095591484db..b098be2b4c0 100644
--- a/gcc/lto-streamer-in.c
+++ b/gcc/lto-streamer-in.c
@@ -2696,6 +2696,17 @@ lto_input_tree (struct lto_input_block *ib, struct data_in *data_in)
 	 the code and class.  */
       result = lto_get_builtin_tree (ib, data_in);
     }
+  else if (tag == LTO_var_decl_alias)
+    {
+      /* An extra_name alias for a variable.  */
+      unsigned HOST_WIDE_INT ix;
+      tree target;
+      ix = lto_input_uleb128 (ib);
+      result = lto_file_decl_data_get_var_decl (data_in->file_data, ix);
+      ix = lto_input_uleb128 (ib);
+      target = lto_file_decl_data_get_var_decl (data_in->file_data, ix);
+      varpool_extra_name_alias (result, target);
+    }
   else if (tag == lto_tree_code_to_tag (INTEGER_CST))
     {
       /* For integer constants we only need the type and its hi/low