[Bug target/89628] aarch64_vector_pcs does not use v24-v31 as temp regs

[sje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89628

Steve Ellcey <sje at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2019-03-08
     Ever confirmed|0                           |1

--- Comment #1 from Steve Ellcey <sje at gcc dot gnu.org> ---
I think the problem here is that we are not setting REG_ALLOC_ORDER and/or
ADJUST_REG_ALLOC_ORDER on aarch64.

I am not sure which one we should use, but I will look into it.