This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: [patch] h8300: Optimize addsi_h8300.

From: Kazu Hirata <kazu at cs dot umass dot edu>
To: tm_gccmail at mail dot kloo dot net
Cc: gcc-patches at gcc dot gnu dot org
Date: Tue, 21 Jan 2003 15:40:57 -0500 (EST)
Subject: Re: [patch] h8300: Optimize addsi_h8300.
References: <20030121.093133.27773864.kazu@cs.umass.edu><Pine.LNX.4.21.0301211227390.32632-100000@mail.kloo.net>

Hi Toshi,

> BTW, does the H8/300 port do add-splitting early or late?
> 
> We noticed on the SH that if you do add-splitting early, it interferes
> with CSE because the constants aren't exposed anymore...
> 
> Hopeflly this is done late?

By "add-splitting" do you mean splitting

  add.l #3,er0

to

  adds #2,er0
  adds #1,er0

If so, it is done everywhere.  The splitter does not even have
reload_completed.

Kazu Hirata

Follow-Ups:
- Re: [patch] h8300: Optimize addsi_h8300.
  - From: tm_gccmail

References:
- [patch] h8300: Optimize addsi_h8300.
  - From: Kazu Hirata
- Re: [patch] h8300: Optimize addsi_h8300.
  - From: tm_gccmail

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]