On 12 June 2020 20:55 Andrew Pinski wrote:
> Subject: Re: [PATCH][GCC][Aarch64]: Fix for PR94880: Failure to recognize
> andn pattern
>
> On Fri, Jun 12, 2020 at 7:50 AM Przemyslaw Wirkus
> wrote:
> >
> > Hi all,
> >
> > Pattern "(x | y) - y" c
On Fri, Jun 12, 2020 at 7:50 AM Przemyslaw Wirkus
wrote:
>
> Hi all,
>
> Pattern "(x | y) - y" can be optimized to simple "(x & ~y)" andn pattern.
Isn't it better to do this transformation on the gimple level and not
in a target specific form? Or at least do it in the RTL level in a
generic form
Hi all,
Pattern "(x | y) - y" can be optimized to simple "(x & ~y)" andn pattern.
So, for the example code:
$ cat main.c
int
f_i(int x, int y)
{
return (x | y) - y;
}
long long
f_l(long long x, long long y)
{
return (x | y) - y;
}
typedef int v4si __attribute__ ((vector_size (1
