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] Fix PR optimization/7871

From: Jim Wilson <wilson at specifixinc dot com>
To: Eric Botcazou <ebotcazou at libertysurf dot fr>
Cc: gcc-patches at gcc dot gnu dot org
Date: Wed, 18 Feb 2004 17:50:35 -0800
Subject: Re: [PATCH] Fix PR optimization/7871
References: <200402022215.26999.ebotcazou@libertysurf.fr>

Eric Botcazou wrote:

	PR optimization/7871
	* flow.c (propagate_one_insn): Interpret calls as setting global
	registers, not merely clobbering them.

I put some comments on this patch in the PR. Briefly, I tried this patch almost a year ago, but it did not work for one of the testcases. It does work now, but more by accident than by design, because of a combine patch checked in by Kenner for an unrelated problem. I think the patch does something useful, but also I think there is a latent problem that needs to be considered. Perhaps just adding a few comments is enough for now. Or maybe it is safe to ignore the latent problem. See the PR for details. -- Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com

References:
- [PATCH] Fix PR optimization/7871
  - From: Eric Botcazou

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