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)
