On Tue, Oct 27, 2015 at 7:34 AM, Ramana Radhakrishnan
<ramana.radhakrish...@foss.arm.com> wrote:
>
>>
>> OK, then it's fairly x86-64 specific optimization, because we can't do "call
>> *mem" in
>> aarch64 and some other targets.
>
> It is a fairly x86_64 specific optimization and doesn't apply to AArch64.
>
> The question really is what impact does removing the generic code handling
> have on aarch64 - is it a no-op or not for the existing -fno-plt
> implementation in the AArch64 backend ? The only case that is of interest is
> the bit below in calls.c and it looks like that may well be redundant with
> the logic in the backend already, but I have not done the full analysis to
> convince myself that the code in the backend is sufficient.
>
> - && (!flag_plt
> - || lookup_attribute ("noplt", DECL_ATTRIBUTES
> (fndecl_or_type)))
> - && !targetm.binds_local_p (fndecl_or_type))
>
-fno-plt is a backend specific optimization and should be handled
in backend.
--
H.J.
