Hi,
Segher Boessenkool writes:
> Hi!
>
> On Thu, Aug 25, 2022 at 08:11:31PM +0800, Jiufu Guo wrote:
>> Segher Boessenkool writes:
>> > You usually can split fine if you cannot create new pseudos, by reusing
>> > existing registers.
>> >
>> > FAIL will cause an ICE: the RTL instruction does matc
Hi!
On Thu, Aug 25, 2022 at 08:11:31PM +0800, Jiufu Guo wrote:
> Segher Boessenkool writes:
> > You usually can split fine if you cannot create new pseudos, by reusing
> > existing registers.
> >
> > FAIL will cause an ICE: the RTL instruction does match, but will fail
> > when trying to generate
Hi,
Segher Boessenkool writes:
> On Wed, Aug 24, 2022 at 03:48:49PM +0800, Jiufu Guo wrote:
>> Segher Boessenkool writes:
>> >> + "TARGET_POWERPC64 && !reload_completed && can_create_pseudo_p ()
>> >
>> > reload_completed in splitters is almost always wrong. It isn't any
>> > better if it is
On Wed, Aug 24, 2022 at 03:48:49PM +0800, Jiufu Guo wrote:
> Segher Boessenkool writes:
> >> + "TARGET_POWERPC64 && !reload_completed && can_create_pseudo_p ()
> >
> > reload_completed in splitters is almost always wrong. It isn't any
> > better if it is in the insn condition of a define_insn_an
Hi!
Segher Boessenkool writes:
> Hi!
>
> On Mon, Jul 25, 2022 at 09:29:22PM +0800, Jiufu Guo wrote:
>> When checking eq/neq with a constant which has only 16bits, it can be
>> optimized to check the rotated data. By this, the constant building
>> is optimized.
>
> "ne", not "neq".
Oh, thanks!
>
Hi!
On Mon, Jul 25, 2022 at 09:29:22PM +0800, Jiufu Guo wrote:
> When checking eq/neq with a constant which has only 16bits, it can be
> optimized to check the rotated data. By this, the constant building
> is optimized.
"ne", not "neq".
> gcc/ChangeLog:
>
> * config/rs6000/rs6000-protos
Gentle ping:
https://gcc.gnu.org/pipermail/gcc-patches/2022-July/598769.html
BR,
Jeff(Jiufu)
Jiufu Guo writes:
> Hi,
>
> When checking eq/neq with a constant which has only 16bits, it can be
> optimized to check the rotated data. By this, the constant building
> is optimized.
>
> As the exam
Hi,
When checking eq/neq with a constant which has only 16bits, it can be
optimized to check the rotated data. By this, the constant building
is optimized.
As the example in PR103743:
For "in == 0x8000LL", this patch generates:
rotldi %r3,%r3,16
cmpldi %cr0,%r3,32768
