Szabolcs Nagy <szabolcs.n...@arm.com> writes:
> EH returns no longer rely on clobbering the return address on the stack
> so forcing a stack frame is not necessary.
>
> This does not actually change the code gen for the unwinder since there
> are calls before the EH return.
>
> gcc/ChangeLog:
>
> * config/aarch64/aarch64.cc (aarch64_needs_frame_chain): Do not
> force frame chain for eh_return.
OK once we've agreed on something for 03/11.
Thanks,
Richard
> ---
> gcc/config/aarch64/aarch64.cc | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
> index 36cd172d182..afdbf4213c1 100644
> --- a/gcc/config/aarch64/aarch64.cc
> +++ b/gcc/config/aarch64/aarch64.cc
> @@ -8417,8 +8417,7 @@ aarch64_output_probe_sve_stack_clash (rtx base, rtx
> adjustment,
> static bool
> aarch64_needs_frame_chain (void)
> {
> - /* Force a frame chain for EH returns so the return address is at FP+8. */
> - if (frame_pointer_needed || crtl->calls_eh_return)
> + if (frame_pointer_needed)
> return true;
>
> /* A leaf function cannot have calls or write LR. */
