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Re: [PATCH] Add -mno-r11 option to suppress load of ppc64 static chain in indirect calls
On Thu, Jul 7, 2011 at 9:14 PM, David Edelsohn <dje.gcc@gmail.com> wrote:
> On Thu, Jul 7, 2011 at 11:53 AM, Richard Guenther
> <richard.guenther@gmail.com> wrote:
>
>> Well, that's up to the target maintainers to decide, maybe
>> -mno-nested-functions instead?
>
> Is -mno-nested-functions or -mno-nested-function-pointers too
> C-centric or GCC-centric? ?I don't know what wording would be more
> informative, but the functionality is available in Pascal, PL/I, Ada,
> GCC extensions and other languages. ?We're open to suggestions.
>
>> The compiler certainly can't figure out in _all_ cases - but it should be able to handle
>> most of the cases (with LTO even more cases) ok, no?
>
> -mno-r11 is an assertion to the compiler that no function calls
> through pointers will require the static chain. ?However, I agree that
> the compiler conservatively should be able to figure out some cases
> itself, which would be a good enhancement.
Does XLC have a similar switch whose name we can use?
Richard.
> Thanks, David
>