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Re: [RFC] hard-reg-set.h refactoring

From: Mike Stump <mikestump at comcast dot net>
To: Paolo Bonzini <bonzini at gnu dot org>
Cc: Dimitrios Apostolou <jimis at gmx dot net>, gcc-patches at gcc dot gnu dot org, Jakub Jelinek <jakub at redhat dot com>, "Joseph S. Myers" <joseph at codesourcery dot com>, Steven Bosscher <stevenb dot gcc at gmail dot com>
Date: Tue, 2 Aug 2011 06:46:13 -0700
Subject: Re: [RFC] hard-reg-set.h refactoring
References: <alpine.LNX.2.02.1107302005400.1374@localhost.localdomain> <CAHFMJ7uB5m5bEGb0JPMm=YbnEmEkQyY9zpn_K87aUhVP1So+kw@mail.gmail.com> <alpine.LNX.2.02.1108011845510.1374@localhost.localdomain> <4E36CD59.1070202@gnu.org> <alpine.LNX.2.02.1108012152420.1374@localhost.localdomain> <4E37AC87.5070203@gnu.org>

On Aug 2, 2011, at 12:51 AM, Paolo Bonzini wrote:

> On 08/01/2011 09:10 PM, Dimitrios Apostolou wrote:
>> 
>> Keeping my patch exactly the same, just changing the
>> hook_void_hard_reg_set to receive a (HOST_WIDEST_FAST_INT *) arg and
>> doing the necessary typecasts, added an extra 3 M instructions.
>> 
>> But the ix86_live_on_entry is only called 1233x times from df-scan.c.
>> This isn't enough to explain all this overhead.
> 
> Indeed, 0.2% is hard to attribute to anything anyway.

Only if you lack the tools to collect data.  :-(

References:
- Re: [RFC] hard-reg-set.h refactoring
  - From: Dimitrios Apostolou
- Re: [RFC] hard-reg-set.h refactoring
  - From: Paolo Bonzini
- Re: [RFC] hard-reg-set.h refactoring
  - From: Dimitrios Apostolou
- Re: [RFC] hard-reg-set.h refactoring
  - From: Paolo Bonzini

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