From: Richard Henderson <rth@redhat.com>
To: "Paulo J. Matos" <pocmatos@gmail.com>
Cc: gcc@gcc.gnu.org
Subject: Re: splitting add instructions
Date: Tue, 19 Jul 2011 15:42:00 -0000 [thread overview]
Message-ID: <4E25A46C.4040403@redhat.com> (raw)
In-Reply-To: <j046lt$sg$1@dough.gmane.org>
On 07/19/2011 08:08 AM, Paulo J. Matos wrote:
> So, this seems to have to do with the post-reload comparison optimization pass Richard mentioned.
Exactly.
> But I am still confused as to how GCC matches them. Is *_flags any
> special name GCC loops for (doubtful)?
No, and as you can see from the leading "*" in the name, the
name is not actually visible as a pattern.
As an experiment, please read the comment at the start of the
compare-elim.c file. If you still do not understand how the
patch works, that suggests the documentation needs improvement.
r~
next prev parent reply other threads:[~2011-07-19 15:36 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-18 16:49 Paulo J. Matos
2011-07-18 16:59 ` Richard Henderson
2011-07-18 17:31 ` Paul Koning
2011-07-18 21:20 ` Richard Henderson
2011-07-19 8:27 ` Paulo J. Matos
2011-07-19 10:21 ` Paulo J. Matos
2011-07-19 15:42 ` Richard Henderson
2011-07-19 15:58 ` Paulo J. Matos
2011-07-19 16:08 ` Paulo J. Matos
2011-07-19 16:43 ` Richard Henderson
2011-07-19 12:57 ` Paul Koning
2011-07-19 8:30 ` Paulo J. Matos
2011-07-19 10:30 ` Paulo J. Matos
2011-07-19 10:52 ` Paulo J. Matos
2011-07-19 15:06 ` Paulo J. Matos
2011-07-19 15:09 ` DJ Delorie
2011-07-19 15:21 ` Paulo J. Matos
2011-07-19 15:42 ` Richard Henderson [this message]
2011-07-19 15:42 ` Paulo J. Matos
2011-07-18 17:29 ` Ian Lance Taylor
2011-07-19 8:49 ` Paulo J. Matos
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