-Original Message-
From: Bin.Cheng [mailto:amker.ch...@gmail.com]
Sent: 20 June 2014 06:25
To: Bingfeng Mei
Cc: gcc@gcc.gnu.org
Subject: Re: regs_used estimation in IVOPTS seriously flawed
On Tue, Jun 17, 2014 at 10:59 PM, Bingfeng Mei b...@broadcom.com wrote:
Hi,
I am
On Fri, Jun 20, 2014 at 5:01 PM, Bingfeng Mei b...@broadcom.com wrote:
-Original Message-
From: Bin.Cheng [mailto:amker.ch...@gmail.com]
Sent: 20 June 2014 06:25
To: Bingfeng Mei
Cc: gcc@gcc.gnu.org
Subject: Re: regs_used estimation in IVOPTS seriously flawed
On Tue, Jun 17, 2014
estimation in IVOPTS seriously flawed
On Fri, Jun 20, 2014 at 5:01 PM, Bingfeng Mei b...@broadcom.com wrote:
-Original Message-
From: Bin.Cheng [mailto:amker.ch...@gmail.com]
Sent: 20 June 2014 06:25
To: Bingfeng Mei
Cc: gcc@gcc.gnu.org
Subject: Re: regs_used estimation
On Fri, Jun 20, 2014 at 5:01 AM, Bingfeng Mei b...@broadcom.com wrote:
As a short term solution, I tried some simple non-linear functions as Richard
suggested
to penalize using too many IVs. For example, the following cost in
ivopts_global_cost_for_size fixed my regression and actually
On Tue, Jun 17, 2014 at 10:59 PM, Bingfeng Mei b...@broadcom.com wrote:
Hi,
I am looking at a performance regression in our code. A big loop produces
and uses a lot of temporary variables inside the loop body. The problem
appears that IVOPTS pass creates even more induction variables (from
On Tue, Jun 17, 2014 at 4:59 PM, Bingfeng Mei b...@broadcom.com wrote:
Hi,
I am looking at a performance regression in our code. A big loop produces
and uses a lot of temporary variables inside the loop body. The problem
appears that IVOPTS pass creates even more induction variables (from
-Original Message-
From: Richard Biener [mailto:richard.guent...@gmail.com]
Sent: 18 June 2014 12:36
To: Bingfeng Mei
Cc: gcc@gcc.gnu.org
Subject: Re: regs_used estimation in IVOPTS seriously flawed
On Tue, Jun 17, 2014 at 4:59 PM, Bingfeng Mei b...@broadcom.com wrote:
Hi,
I
Hi,
I am looking at a performance regression in our code. A big loop produces
and uses a lot of temporary variables inside the loop body. The problem
appears that IVOPTS pass creates even more induction variables (from original
2 to 27). It causes a lot of register spilling later and performance
