[Bug target/88851] [9 Regression] SVE Stack clash and r263173 use conflicting registers

[tnfchris at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88851

--- Comment #1 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Author: tnfchris
Date: Thu Jan 17 12:06:04 2019
New Revision: 268017

URL: https://gcc.gnu.org/viewcvs?rev=268017&root=gcc&view=rev
Log:
Rename stack-clash protection CFA register to avoid clash

gcc/ChangeLog:

        PR target/88851
        * config/aarch64/aarch64.md (STACK_CLASH_SVE_CFA_REGNUM): New.
        * config/aarch64/aarch64.c (aarch64_allocate_and_probe_stack_space):
Use
        it and document registers.

gcc/testsuite/ChangeLog:

        PR target/88851
        * gcc.target/aarch64/stack-check-cfa-3.c: Update test.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/aarch64/aarch64.c
    trunk/gcc/config/aarch64/aarch64.md
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/aarch64/stack-check-cfa-3.c