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From: Andreas Krebbel <krebbel@linux.ibm.com>
To: Robin Dapp <rdapp@linux.ibm.com>, GCC Patches <gcc-patches@gcc.gnu.org>
Cc: Ilya Leoshkevich <iii@linux.ibm.com>
Subject: Re: [PATCH] S/390: Increase register move costs for CC_REGS
Date: Mon, 05 Nov 2018 16:39:00 -0000	[thread overview]
Message-ID: <a14c8a9e-749e-1c0c-6745-a6b00ffc4f56@linux.ibm.com> (raw)
In-Reply-To: <3ddc5be6-7e0d-5168-62b2-99bbb2116672@linux.ibm.com>

On 05.11.18 15:38, Robin Dapp wrote:
> Hi,
> 
> the attached patch increases the move costs for moves involving the CC
> register.  This saves us some instructions in SPEC CPU2006.
> 
> Regards
>  Robin
> 
> --
> 
> gcc/ChangeLog:
> 
> 2018-11-05  Robin Dapp  <rdapp@linux.ibm.com>
> 
> 	* config/s390/s390.c (s390_register_move_cost): Increase costs
> 	for moves involving the CC reg.
> 

Ok. Thanks!

Andreas

      reply	other threads:[~2018-11-05 16:39 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-05 14:38 Robin Dapp
2018-11-05 16:39 ` Andreas Krebbel [this message]

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