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Re: [PATCH] Improve VEC_BASE

From: Jeff Law <law at redhat dot com>
To: Jakub Jelinek <jakub at redhat dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Thu, 10 Nov 2011 22:58:36 -0700
Subject: Re: [PATCH] Improve VEC_BASE
References: <20111107212547.GO27375@tyan-ft48-01.lab.bos.redhat.com>

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On 11/07/11 14:25, Jakub Jelinek wrote:
> Hi!
> 
> This patch attempts to optimize VEC_BASE if we know that offsetof
> of base is 0 (unless the compiler is doing something strange, it is
> true). It doesn't have a clear code size effect, some .text
> sections grew, supposedly because of more inlining, some .text
> sections shrunk.
> 
> Bootstrapped/regtested on x86_64-linux and i686-linux.
> 
> 2011-11-07  Jakub Jelinek  <jakub@redhat.com>
> 
> * vec.h (VEC_BASE): If base is at offset 0 in the structure, use
> &(P)->base even if P is NULL.
Presumably this becomes redundant with we went with Richi's patch?

jeff

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Follow-Ups:
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References:
- [PATCH] Improve VEC_BASE
  - From: Jakub Jelinek

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