re PR target/84923 (gcc.dg/attr-weakref-1.c failed on aarch64)

        PR gcc/84923
        * varasm.c (weak_finish): Clean up weak_decls.

From-SVN: r260485

gcc/ChangeLog

+2018-05-21  Vladimir Mezentsev  <vladimir.mezentsev@oracle.com>
+
+	PR gcc/84923
+	* varasm.c (weak_finish): Clean up weak_decls.
+
 2018-05-21  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* config/aarch64/aarch64.md ("unspec"): Define UNSPEC_SABAL,

gcc/varasm.c

@@ -5652,7 +5652,8 @@ weak_finish (void)
       tree alias_decl = TREE_PURPOSE (t);
       tree target = ultimate_transparent_alias_target (&TREE_VALUE (t));
 
-      if (! TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (alias_decl)))
+      if (! TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (alias_decl))
+         || TREE_SYMBOL_REFERENCED (target))
 	/* Remove alias_decl from the weak list, but leave entries for
 	   the target alone.  */
 	target = NULL_TREE;