[ping] use REGNUM macros instead of hardcoded values in aarch64 PROBE_STACK reg definitions

[Olivier Hainque]

Hello,

Ping for one of the changes last proposed here:

  https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00761.html

Submitted separately as an attempt to facilitate the review
process.

Got access to a linux box, so in addition to the Ada testing
we do on cross aarch64-vxworks7, bootstrapped and regression
tested on aarch64-linux.


This one is just a simple use of REGNUM macros instead
of harcoded values in the definition of PROBE_STACK_FIRST_REG
and PROBE_STACK_SECOND_REG in aarch64.c.

OK to commit ?

Thanks in advance!

Olivier

2018-12-12  Olivier Hainque  <hain...@adacore.com>

        * config/aarch64/aarch64.c (PROBE_STACK_FIRST_REG) : Redefine as
        R9_REGNUM instead of 9.
        (PROBE_STACK_SECOND_REG): Redefine as R10_REGNUM instead of 10.

0001-Use-REGNUM-macros-in-the-definitions-of-aarch64-PROB.patch
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