[llvm-dev] reg coalescing improvements

Jonas Paulsson via llvm-dev
Fri, 18 Aug 2017 09:31:41 -0000

Hi Quentin,
> I may be optimistic but I would hope that reordering the instructions in
mischeduler after the coalescer would allow regalloc to do the right thing,
because the hints derived from the copy will be able to be satisfied.
>
> Is that not the case?
Yes, of course, enabling mischeduler helps things so that regalloc can
coalesce it even when the coalescer couldn't... thanks /Jonas