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Re: Optimization of conditional access to globals: thread-unsafe?

From: David Daney <ddaney at avtrex dot com>
To: skaller <skaller at users dot sourceforge dot net>
Cc: gcc at gcc dot gnu dot org
Date: Fri, 26 Oct 2007 17:19:59 -0700
Subject: Re: Optimization of conditional access to globals: thread-unsafe?
References: <e2e108260710260541n61462585u99de9bc0617720f4@mail.gmail.com> <e2e108260710260620k2a2e21b3t1d6c052f14d36094@mail.gmail.com> <20071026143334.GA5041@moonlight.home> <m38x5pj3ig.fsf@localhost.localdomain> <20071026155101.GB5041@moonlight.home> <016201c817e9$5454edd0$2e08a8c0@CAM.ARTIMI.COM> <20071026161739.GC5041@moonlight.home> <Pine.LNX.4.64.0710261836440.23011@wotan.suse.de> <m33avxfu2i.fsf@localhost.localdomain> <1193443563.15346.96.camel@rosella.wigram>

skaller wrote:

On Fri, 2007-10-26 at 14:24 -0700, Ian Lance Taylor wrote:
Michael Matz <matz@suse.de> writes:
This is basically a public relations exercise.  I doubt this
optimization is especially important, so I think it's OK to disable it
to keep people happy.  Even though the optimization has been there
since gcc 3.4 and nobody noticed.
Most people didn't have multi-core processors then..

They did use pthreads though. Code correctness in this case does not depend on the number of processor cores.

David Daney

Follow-Ups:
- Re: Optimization of conditional access to globals: thread-unsafe?
  - From: Robert Dewar
- Re: Optimization of conditional access to globals: thread-unsafe?
  - From: skaller

References:
- Re: Optimization of conditional access to globals: thread-unsafe?
  - From: Bart Van Assche
- Re: Optimization of conditional access to globals: thread-unsafe?
  - From: Tomash Brechko
- Re: Optimization of conditional access to globals: thread-unsafe?
  - From: Ian Lance Taylor
- Re: Optimization of conditional access to globals: thread-unsafe?
  - From: Tomash Brechko
- RE: Optimization of conditional access to globals: thread-unsafe?
  - From: Dave Korn
- Re: Optimization of conditional access to globals: thread-unsafe?
  - From: Tomash Brechko
- Re: Optimization of conditional access to globals: thread-unsafe?
  - From: Michael Matz
- Re: Optimization of conditional access to globals: thread-unsafe?
  - From: Ian Lance Taylor
- Re: Optimization of conditional access to globals: thread-unsafe?
  - From: skaller

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