juzhe.zh...@rivai.ai writes:
> From: Ju-Zhe Zhong
>
> Follow Richi's suggestion, I change current decrement IV flow from:
>
> do {
>remain -= MIN (vf, remain);
> } while (remain != 0);
>
> into:
>
> do {
>old_remain = remain;
>len = MIN (vf, remain);
>remain -= vf;
> } while (old_r
"juzhe.zh...@rivai.ai" writes:
> Before this patch:
> foo:
> ble a2,zero,.L5
> csrr a3,vlenb
> srli a4,a3,2
> .L3:
> minu a5,a2,a4
> vsetvli zero,a5,e32,m1,ta,ma
> vle32.v v2,0(a1)
> vle32.v v1,0(a0)
> vsetvli t1,zero,e32,m1,ta,ma
> vadd.vv v1,v1,v2
> vsetvli zero,a5,e32,m1,ta,ma
> vse32.v v1,0(a0
"juzhe.zhong" writes:
> Maybe we can include rgroup number into select vl pattern？So that， I always
> use select vl pattern. In my backend， if it is single rgroup，we gen vsetvl，
> otherwise we gen min.
That just seems to be a way of hiding an “is the target RVV?” test though.
IMO targets shouldn
t; to fix it.
That's odd, you only need to adjust the IV which is used in the exit test,
not all the others.
> Replied Message
> From
> Richard Sandiford
> Date
> 05/30/2023 19:41
> To
> juzhe.zh...@rivai.ai
> Cc
> gcc-patches,
> rguenther,
> linkw
> Su
Richard Biener writes:
> On Wed, 31 May 2023, juzhe.zh...@rivai.ai wrote:
>
>> Hi?all. I have posted my several investigations:
>> https://gcc.gnu.org/pipermail/gcc-patches/2023-May/620101.html
>> https://gcc.gnu.org/pipermail/gcc-patches/2023-May/620105.html
>> https://gcc.gnu.org/pipermail/gcc
On Wed, 31 May 2023, Richard Sandiford wrote:
> Richard Biener writes:
> > On Wed, 31 May 2023, juzhe.zh...@rivai.ai wrote:
> >
> >> Hi?all. I have posted my several investigations:
> >> https://gcc.gnu.org/pipermail/gcc-patches/2023-May/620101.html
> >> https://gcc.gnu.org/pipermail/gcc-patches
zer itself like with
> your patch. I'm going to wait for Richards input though since he
> seems to disagree.
>
> Note with SELECT_VL all bets will be off since as I understand the
> value it gives can vary from iteration to iteration (but we know
> a lower and maybe an u
Richard Biener via Gcc-patches writes:
> On Wed, 31 May 2023, Richard Sandiford wrote:
>
>> Richard Biener writes:
>> > On Wed, 31 May 2023, juzhe.zh...@rivai.ai wrote:
>> >
>> >> Hi?all. I have posted my several investigations:
>> >> https://gcc.gnu.org/pipermail/gcc-patches/2023-May/620101.html
as this flow is better to power (SCEV）。
juzhe.zh...@rivai.ai
From: Richard Sandiford
Date: 2023-05-30 19:31
To: juzhe.zhong
CC: gcc-patches; rguenther; linkw
Subject: Re: [PATCH] VECT: Change flow of decrement IV
juzhe.zh...@rivai.ai writes:
> From: Ju-Zhe Zhong
>
> Follow Rich
by SELET_VL).
juzhe.zh...@rivai.ai
From: Richard Sandiford
Date: 2023-05-30 19:31
To: juzhe.zhong
CC: gcc-patches; rguenther; linkw
Subject: Re: [PATCH] VECT: Change flow of decrement IV
juzhe.zh...@rivai.ai writes:
> From: Ju-Zhe Zhong
>
> Follow Richi's suggestion, I change
g
instruction in preheader
and 1 more mv instruction inside the loop.
juzhe.zh...@rivai.ai
From: Richard Biener
Date: 2023-05-30 20:33
To: juzhe.zhong
CC: Richard Sandiford; gcc-patches; linkw
Subject: Re: [PATCH] VECT: Change flow of decrement IV
On Tue, 30 May 2023, juzhe.zhong wrote:
> This
5-30 20:33
To: juzhe.zhong
CC: Richard Sandiford; gcc-patches; linkw
Subject: Re: [PATCH] VECT: Change flow of decrement IV
On Tue, 30 May 2023, juzhe.zhong wrote:
> This patch will generate the number of rgroup ?mov? instructions inside the
> loop. This is unacceptable. For example?if number of
not
a big deal for RVV.
2. This patch can solve power's issue.
Thanks.
juzhe.zh...@rivai.ai
From: Richard Biener
Date: 2023-05-30 20:33
To: juzhe.zhong
CC: Richard Sandiford; gcc-patches; linkw
Subject: Re: [PATCH] VECT: Change flow of decrement IV
On Tue, 30 May 2023, juzhe.zhong wrote
VV side, it can unroll now.
juzhe.zh...@rivai.ai
From: Richard Biener
Date: 2023-05-30 20:33
To: juzhe.zhong
CC: Richard Sandiford; gcc-patches; linkw
Subject: Re: [PATCH] VECT: Change flow of decrement IV
On Tue, 30 May 2023, juzhe.zhong wrote:
> This patch will generate the num
086.html
or not?
Or you have another plan ?
Thanks.
juzhe.zh...@rivai.ai
From: Richard Biener
Date: 2023-05-31 00:40
To: 钟居哲
CC: richard.sandiford; gcc-patches; linkw
Subject: Re: [PATCH] VECT: Change flow of decrement IV
Am 30.05.2023 um 14:38 schrieb 钟居哲 :
>> That's od
ter well reviewed) or
we should extend SCEV/IVOPTS ?
Thanks.
juzhe.zh...@rivai.ai
From: 钟居哲
Date: 2023-05-30 23:05
To: rguenther
CC: richard.sandiford; gcc-patches; linkw
Subject: Re: Re: [PATCH] VECT: Change flow of decrement IV
More information of power's testcase:
Before this patch:
t
ation to iteration (but we know
a lower and maybe an upper bound?)
Thanks,
Richard.
> Thanks.
>
>
> juzhe.zh...@rivai.ai
>
> From: ???
> Date: 2023-05-30 23:05
> To: rguenther
> CC: richard.sandiford; gcc-patches; linkw
> Subject: Re: Re: [PATCH] VECT: Change fl
a/show_bug.cgi?id=109971,
Kewen is happy with this patch, turns out this patch can fix power's issue.
So, Let's wait for Richard's comments.
Thanks.
juzhe.zh...@rivai.ai
From: Richard Biener
Date: 2023-05-31 14:41
To: juzhe.zh...@rivai.ai
CC: richard.sandiford; gcc-patches; linkw
Su
chard Biener
CC: juzhe.zhong\@rivai.ai; gcc-patches; linkw
Subject: Re: [PATCH] VECT: Change flow of decrement IV
Richard Biener writes:
> On Wed, 31 May 2023, juzhe.zh...@rivai.ai wrote:
>
>> Hi?all. I have posted my several investigations:
>> https://gcc.gnu.org/pipermail/gcc-p
we can make this patch merged and record the enhancement of SCEV in
bugzilla to see we can improve that in the future.
Thanks.
juzhe.zh...@rivai.ai
From: Richard Biener
Date: 2023-05-31 15:38
To: Richard Sandiford
CC: juzhe.zh...@rivai.ai; gcc-patches; linkw
Subject: Re: [PATCH] VECT: Change
Oh, it's correct fix. Thanks for catching this.
juzhe.zh...@rivai.ai
From: Kewen.Lin
Date: 2023-05-31 15:38
To: juzhe.zh...@rivai.ai
CC: richard.sandiford; gcc-patches; rguenther
Subject: Re: [PATCH] VECT: Change flow of decrement IV
> Hi, Richi.
>
>>> Note with SELECT
i
>
> From: Richard Sandiford
> Date: 2023-05-31 15:28
> To: Richard Biener
> CC: juzhe.zhong\@rivai.ai; gcc-patches; linkw
> Subject: Re: [PATCH] VECT: Change flow of decrement IV
> Richard Biener writes:
> > On Wed, 31 May 2023, juzhe.zh...@rivai.ai wrote:
> &g
uzhe.zhong\@rivai.ai; linkw
Subject: Re: [PATCH] VECT: Change flow of decrement IV
Richard Biener via Gcc-patches writes:
> On Wed, 31 May 2023, Richard Sandiford wrote:
>
>> Richard Biener writes:
>> > On Wed, 31 May 2023, juzhe.zh...@rivai.ai wrote:
>> >
On Wed, 31 May 2023, juzhe.zh...@rivai.ai wrote:
> Thanks Richard.
> Seems that this patch's approach is ok to trunk?
> Maybe the only thing we should do is to wait Kewen's testing feedback, am I
> right ?
Can you repost the patch with Kevens fix and state how you tested it?
Thanks,
Richard.
and do my downstream regression
(Regression is very big and include so many benchmarks).
Thanks.
juzhe.zh...@rivai.ai
From: Richard Biener
Date: 2023-05-31 18:53
To: juzhe.zh...@rivai.ai
CC: richard.sandiford; gcc-patches; linkw
Subject: Re: Re: [PATCH] VECT: Change flow of decrement IV
On Wed, 3
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