Sub modifies flags.

This fixes backend/amd64_sub2.c.

Sub modifies flags.
This fixes backend/amd64_sub2.c.
e4263298 · yb9976 · cb2708bd · e4263298
Commit e4263298 authored Aug 28, 2015 by yb9976
--- a/ir/be/amd64/amd64_spec.pl
+++ b/ir/be/amd64/amd64_spec.pl
@@ -306,7 +306,7 @@ sar => {

 sub => {
 	template  => $binop,
-	irn_flags => [ "rematerializable" ],
+	irn_flags => [ "modify_flags", "rematerializable" ],
 	emit      => "sub%M %AM",
 },