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Re: Enabling -frename-registers?

From: Bernd Schmidt <bschmidt at redhat dot com>
To: Ramana Radhakrishnan <ramana dot radhakrishnan at arm dot com>, Eric Botcazou <ebotcazou at adacore dot com>
Cc: gcc-patches at gcc dot gnu dot org, David Edelsohn <dje dot gcc at gmail dot com>, Richard Biener <richard dot guenther at gmail dot com>, Jeffrey Law <law at redhat dot com>, Segher Boessenkool <segher at kernel dot crashing dot org>, nd <nd at arm dot com>
Date: Wed, 4 May 2016 15:37:44 +0200
Subject: Re: Enabling -frename-registers?
Authentication-results: sourceware.org; auth=none
References: <CAGWvnykBEjYMgOCaR_ZGLwB3fxPg-pB3WPSwAvmUBXzmXct8gg at mail dot gmail dot com> <2317874 dot CXT2IFrHHt at polaris> <5729CAB8 dot 8040805 at redhat dot com> <1996332 dot 01ClvNjCVc at polaris> <5729F83A dot 1060008 at arm dot com>

On 05/04/2016 03:25 PM, Ramana Radhakrishnan wrote:

On ARM / AArch32 I haven't seen any performance data yet - the one
place we are concerned about the impact is on Thumb2 code size as
regrename may end up inadvertently putting more things in high
registers.

In theory at least arm_preferred_rename_class is designed to make theopposite happen.



Bernd

Follow-Ups:
- Re: Enabling -frename-registers?
  - From: Ramana Radhakrishnan

References:
- Re: Enabling -frename-registers?
  - From: Eric Botcazou
- Re: Enabling -frename-registers?
  - From: Bernd Schmidt
- Re: Enabling -frename-registers?
  - From: Eric Botcazou
- Re: Enabling -frename-registers?
  - From: Ramana Radhakrishnan

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