Fix obvious error in handling of error attribute (PR lto/85248).

2018-04-10  Martin Liska  <mliska@suse.cz>

	PR lto/85248
	* lto-symtab.c (lto_symtab_merge_p): Do not check for
	TREE_VALUES of error attributes.

From-SVN: r259274

gcc/lto/ChangeLog

+2018-04-10  Martin Liska  <mliska@suse.cz>
+
+	PR lto/85248
+	* lto-symtab.c (lto_symtab_merge_p): Do not check for
+	TREE_VALUES of error attributes.
+
 2018-04-10  Richard Biener  <rguenther@suse.de>
 	    Martin Liska  <mliska@suse.cz>
 

gcc/lto/lto-symtab.c

@@ -605,10 +605,7 @@ lto_symtab_merge_p (tree prevailing, tree decl)
 
       prev_attr = lookup_attribute ("noreturn", DECL_ATTRIBUTES (prevailing));
       attr = lookup_attribute ("noreturn", DECL_ATTRIBUTES (decl));
-      if ((prev_attr == NULL) != (attr == NULL)
-	  || (prev_attr
-	      && TREE_VALUE (TREE_VALUE (prev_attr))
-		 != TREE_VALUE (TREE_VALUE (attr))))
+      if ((prev_attr == NULL) != (attr == NULL))
 	{
           if (symtab->dump_file)
 	    fprintf (symtab->dump_file, "Not merging decls; "