Hi Jeff, > So I'm going to have to trust you on this one. It looks like you did > more than just reorder the alternatives. For example, the constraints > for operand0 look significantly different to me. THey're slightly > different for operand1 as well (LR rather than Lc).
When we moved the ARC backend to LRA, we retired the register classes covered by `c` and `w` register constraints letters. Now, all of them are pointing to the same register class like `r`. So, whenever I have the opportunity, I also refactor the patterns not to use any longer the obsolete register constraints. Probably, this is the reason why the patch looks like it is more than reordering, but at the core it is just that :) Thank you for your review, Claudiu
