gimple-fold.c (fold_gimple_assign): Do not intorudce referneces to BUILT_IN_UNREACHABLE.

	* gimple-fold.c (fold_gimple_assign): Do not intorudce referneces
	to BUILT_IN_UNREACHABLE.

From-SVN: r214114

gcc/ChangeLog

+2014-08-18  Jan Hubicka  <hubicka@ucw.cz>
+
+	* gimple-fold.c (fold_gimple_assign): Do not intorudce referneces
+	to BUILT_IN_UNREACHABLE.
+
 2014-08-18  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/62011

gcc/gimple-fold.c

@@ -324,7 +324,9 @@ fold_gimple_assign (gimple_stmt_iterator *si)
 		    if (targets.length () == 1)
 		      fndecl = targets[0]->decl;
 		    else
-		      fndecl = builtin_decl_implicit (BUILT_IN_UNREACHABLE);
+		      /* We can not use __builtin_unreachable here because it
+			 can not have address taken.  */
+		      fndecl = integer_zero_node;
 		    if (dump_enabled_p ())
 		      {
 			location_t loc = gimple_location_safe (stmt);