2014-07-03 16:07 GMT+04:00 Uros Bizjak <ubiz...@gmail.com>: > On Thu, Jul 3, 2014 at 1:50 PM, Ilya Enkovich <enkovich....@gmail.com> wrote: > >> I didn't find a nice way to fix peephole2 patterns to take register >> constraints into account. Is there any way to do it? > > Use REX_SSE_REGNO_P (REGNO (operands[...])) in the insn C constraint.
Peephole doesn't know whether it works with tuned instruction or not, right? I would need to mark all instructions I modify with some attribute and then check for it in peephole. > >> Also fully restrict xmm8-15 does not seem right. It is just costly >> but not fully disallowed. > > As said earlier, you can try "Ya*x" as a constraint. I tried it. It does not seem to affect allocation much. I do not see any gain on targeted tests. Ilya > > Uros.
