> -Original Message-
> From: Richard Biener
> Sent: Thursday, August 31, 2023 8:23 PM
> To: Di Zhao OS
> Cc: Jeff Law ; Martin Jambor ; gcc-
> patc...@gcc.gnu.org
> Subject: Re: [PATCH] [tree-optimization/110279] swap operands in reassoc to
> reduce cross backedge
l Message-
> > > > From: Richard Biener
> > > > Sent: Tuesday, August 29, 2023 4:09 PM
> > > > To: Di Zhao OS
> > > > Cc: Jeff Law ; Martin Jambor ;
> > gcc-
> > > > patc...@gcc.gnu.org
> > > > Subject: Re: [PATCH
Hello Richard,
> -Original Message-
> From: Richard Biener
> Sent: Tuesday, August 29, 2023 7:11 PM
> To: Di Zhao OS
> Cc: Jeff Law ; Martin Jambor ; gcc-
> patc...@gcc.gnu.org
> Subject: Re: [PATCH] [tree-optimization/110279] swap operands in reassoc to
> r
On 8/29/23 01:41, Richard Biener wrote:
_1 = a * b;
_2 = .FMA (c, d, _1);
acc_1 = acc_0 + _2;
How can we execute the multiply and the FMA in parallel? They
depend on each other. Or is it the uarch can handle dependence
on the add operand but only when it is with a
> > > > From: Richard Biener
> > > > Sent: Tuesday, August 29, 2023 3:41 PM
> > > > To: Jeff Law ; Martin Jambor
> > > > Cc: Di Zhao OS ; gcc-patches@gcc.gnu.org
> > > > Subject: Re: [PATCH] [tree-optimization/110279] swap operands in reassoc
>
Hi,
> -Original Message-
> From: Richard Biener
> Sent: Tuesday, August 29, 2023 4:09 PM
> To: Di Zhao OS
> Cc: Jeff Law ; Martin Jambor ; gcc-
> patc...@gcc.gnu.org
> Subject: Re: [PATCH] [tree-optimization/110279] swap operands in reassoc to
> reduce cross
On Tue, Aug 29, 2023 at 9:49 AM Di Zhao OS
wrote:
>
> Hi,
>
> > -Original Message-
> > From: Richard Biener
> > Sent: Tuesday, August 29, 2023 3:41 PM
> > To: Jeff Law ; Martin Jambor
> > Cc: Di Zhao OS ; gcc-patches@gcc.gnu.org
> > Subject
Hi,
> -Original Message-
> From: Richard Biener
> Sent: Tuesday, August 29, 2023 3:41 PM
> To: Jeff Law ; Martin Jambor
> Cc: Di Zhao OS ; gcc-patches@gcc.gnu.org
> Subject: Re: [PATCH] [tree-optimization/110279] swap operands in reassoc to
> reduce cross backedge
On Tue, Aug 29, 2023 at 1:23 AM Jeff Law via Gcc-patches
wrote:
>
>
>
> On 8/28/23 02:17, Di Zhao OS via Gcc-patches wrote:
> > This patch tries to fix the 2% regression in 510.parest_r on
> > ampere1 in the tracker. (Previous discussion is here:
> >
On 8/28/23 02:17, Di Zhao OS via Gcc-patches wrote:
This patch tries to fix the 2% regression in 510.parest_r on
ampere1 in the tracker. (Previous discussion is here:
https://gcc.gnu.org/pipermail/gcc-patches/2023-July/624893.html)
1. Add testcases for the problem. For an op list in the form
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