On Jan 24, 2013, at 11:28 AM, Georg-Johann Lay <g...@gcc.gnu.org> wrote: >> Please consider this as a reminder to review the patch posted at >> following link:- >> http://gcc.gnu.org/ml/gcc-patches/2012-12/msg00765.html > > What is this good for? > > Why are you changing the semantics of an existing, global constraint?
Don't worry, we reject this patch; it is a bad idea. X does in fact mean, place no constraints on it. If a port wants something between X and r, then the port will define their own letter and use it.