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
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.
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:
>> >
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
"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
"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
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
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
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
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