On Wed, 9 Nov 2022, Jiufu Guo wrote:
> Hi,
>
> Richard Biener writes:
>
> > On Mon, Oct 31, 2022 at 11:14 PM Jeff Law via Gcc-patches
> > wrote:
> >>
> >>
> >> On 10/30/22 20:42, Jiufu Guo via Gcc-patches wrote:
> >> > Hi,
> >> >
> >> > We know that for struct variable assignment, memory copy
Hi,
Richard Biener writes:
> On Mon, Oct 31, 2022 at 11:14 PM Jeff Law via Gcc-patches
> wrote:
>>
>>
>> On 10/30/22 20:42, Jiufu Guo via Gcc-patches wrote:
>> > Hi,
>> >
>> > We know that for struct variable assignment, memory copy may be used.
>> > And for memcpy, we may load and store more b
On Wed, 9 Nov 2022, Jiufu Guo wrote:
> Jiufu Guo via Gcc-patches writes:
>
> > Richard Biener writes:
> >
> >> On Tue, 1 Nov 2022, Jiufu Guo wrote:
> >>
> >>> Segher Boessenkool writes:
> >>>
> >>> > On Mon, Oct 31, 2022 at 04:13:38PM -0600, Jeff Law wrote:
> >>> >> On 10/30/22 20:42, Jiufu G
Jiufu Guo via Gcc-patches writes:
> Richard Biener writes:
>
>> On Tue, 1 Nov 2022, Jiufu Guo wrote:
>>
>>> Segher Boessenkool writes:
>>>
>>> > On Mon, Oct 31, 2022 at 04:13:38PM -0600, Jeff Law wrote:
>>> >> On 10/30/22 20:42, Jiufu Guo via Gcc-patches wrote:
>>> >> >We know that for struct
Richard Biener writes:
> On Tue, 1 Nov 2022, Jiufu Guo wrote:
>
>> Segher Boessenkool writes:
>>
>> > On Mon, Oct 31, 2022 at 04:13:38PM -0600, Jeff Law wrote:
>> >> On 10/30/22 20:42, Jiufu Guo via Gcc-patches wrote:
>> >> >We know that for struct variable assignment, memory copy may be used.
On Tue, 1 Nov 2022, Jiufu Guo wrote:
> Segher Boessenkool writes:
>
> > On Mon, Oct 31, 2022 at 04:13:38PM -0600, Jeff Law wrote:
> >> On 10/30/22 20:42, Jiufu Guo via Gcc-patches wrote:
> >> >We know that for struct variable assignment, memory copy may be used.
> >> >And for memcpy, we may load
On Mon, Oct 31, 2022 at 11:14 PM Jeff Law via Gcc-patches
wrote:
>
>
> On 10/30/22 20:42, Jiufu Guo via Gcc-patches wrote:
> > Hi,
> >
> > We know that for struct variable assignment, memory copy may be used.
> > And for memcpy, we may load and store more bytes as possible at one time.
> > While i
Segher Boessenkool writes:
> On Mon, Oct 31, 2022 at 04:13:38PM -0600, Jeff Law wrote:
>> On 10/30/22 20:42, Jiufu Guo via Gcc-patches wrote:
>> >We know that for struct variable assignment, memory copy may be used.
>> >And for memcpy, we may load and store more bytes as possible at one time.
>>
Jeff Law writes:
> On 10/30/22 20:42, Jiufu Guo via Gcc-patches wrote:
>> Hi,
>>
>> We know that for struct variable assignment, memory copy may be used.
>> And for memcpy, we may load and store more bytes as possible at one time.
>> While it may be not best here:
>> 1. Before/after stuct variabl
Segher Boessenkool writes:
> Hi!
>
> On Mon, Oct 31, 2022 at 10:42:35AM +0800, Jiufu Guo wrote:
>> #define FN 4
>> typedef struct { double a[FN]; } A;
>>
>> A foo (const A *a) { return *a; }
>> A bar (const A a) { return a; }
>> ///
>>
>> If FN<=2; the size of "A" fits into TImode, then thi
On Mon, Oct 31, 2022 at 04:13:38PM -0600, Jeff Law wrote:
> On 10/30/22 20:42, Jiufu Guo via Gcc-patches wrote:
> >We know that for struct variable assignment, memory copy may be used.
> >And for memcpy, we may load and store more bytes as possible at one time.
> >While it may be not best here:
>
Hi!
On Mon, Oct 31, 2022 at 10:42:35AM +0800, Jiufu Guo wrote:
> #define FN 4
> typedef struct { double a[FN]; } A;
>
> A foo (const A *a) { return *a; }
> A bar (const A a) { return a; }
> ///
>
> If FN<=2; the size of "A" fits into TImode, then this code can be optimized
> (by subreg/cse/
On 10/30/22 20:42, Jiufu Guo via Gcc-patches wrote:
Hi,
We know that for struct variable assignment, memory copy may be used.
And for memcpy, we may load and store more bytes as possible at one time.
While it may be not best here:
1. Before/after stuct variable assignment, the vaiable may be o
Hi,
We know that for struct variable assignment, memory copy may be used.
And for memcpy, we may load and store more bytes as possible at one time.
While it may be not best here:
1. Before/after stuct variable assignment, the vaiable may be operated.
And it is hard for some optimizations to leap o
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