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To: Florian Weimer <fw@deneb.enyo.de>
Cc: Robert Dewar <dewar@adacore.com>, 	Andrew Haley <aph-gcc@littlepinkcloud.COM>, 	Bart Van Assche <bart.vanassche@gmail.com>, gcc@gcc.gnu.org, 	Andrew Pinski <pinskia@gmail.com>, 	Tomash Brechko <tomash.brechko@gmail.com>
Subject: Re: Optimization of conditional access to globals: thread-unsafe?
References: <e2e108260710260634q7a291337s6e66dfa25f28b68a@mail.gmail.com> <e2e108260710260705s170a7c82udb0c9db26a408d84@mail.gmail.com> <18210.795.425145.46885@zebedee.pink> <47220475.4000703@adacore.com> <2007-10-26-17-59-37+trackit+sam@rfc1149.net> <4722F361.7050302@adacore.com> <871wbgof5f.fsf@mid.deneb.enyo.de>
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On 27/10, Florian Weimer wrote:

| (I can't reproduce the conditional store with my GCC 4.2 installation,
| though.)

You need "-O -fno-inline" to trigger it on this particular example
(you don't need "-fno-inline" if you put "Lock" in a separate package).