On Wed, Mar 28, 2018 at 06:30:21PM +0200, Martin Liška wrote:
> --- a/gcc/config/linux.c
> +++ b/gcc/config/linux.c
> @@ -37,3 +37,24 @@ linux_libc_has_function (enum function_class fn_class)
>
> return false;
> }
> +
> +/* This hook determines whether a function from libc has a fast
> implementation
> + FN is present at the runtime. We override it for i386 and glibc C library
> + as this combination provides fast implementation of mempcpy function. */
> +
> +enum libc_speed
> +ix86_linux_libc_func_speed (int fn)
Putting a ix86_ function into config/linux.c used by most linux targets is
weird. Either we multiple linux targets with mempcpy fast, then name it
somehow cpu neutral and let all those CPUs pick it up in config/*/linux.h.
And yes, we do care about i?86-linux. Or it is for x86 only, and then
it shouldn't be in config/linux.c, but either e.g. static inline in
config/i386/linux.h, or we need config/i386/linux.c if we don't have it
already.
Jakub
