[Bug target/94791] aarch64: -pg profiling is broken with pac-ret

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94791

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-8 branch has been updated by Szabolcs Nagy <nsz@gcc.gnu.org>:

https://gcc.gnu.org/g:d4fcc365700f94fd15c67b30a3051aeabbb767bc

commit r8-10641-gd4fcc365700f94fd15c67b30a3051aeabbb767bc
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Tue Jun 2 16:44:41 2020 +0100

    aarch64: fix return address access with pac [PR94891][PR94791]

    This is a big hammer fix for __builtin_return_address (PR target/94891)
    returning signed addresses (sometimes, depending on wether lr happens
    to be signed or not at the time of call which depends on optimizations),
    and similarly -pg may pass signed return address to _mcount
    (PR target/94791).

    At the time of return address expansion we don't know if it's signed or
    not so it is done unconditionally.

    2020-07-13  Szabolcs Nagy  <szabolcs.nagy@arm.com>

    gcc/ChangeLog:

            PR target/94891
            PR target/94791
            * config/aarch64/aarch64-protos.h (aarch64_return_addr_rtx):
Declare.
            * config/aarch64/aarch64.c (aarch64_return_addr_rtx): New.
            (aarch64_return_addr): Use aarch64_return_addr_rtx.
            * config/aarch64/aarch64.h (PROFILE_HOOK): Likewise.

    (cherry picked from commit 463a54e5d4956143f81c1f23b91cbd2d93855741)