linux-kernel - Re: Is gcc thread-unsafe?

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Date:	Thu, 25 Oct 2007 11:55:03 +0200
From:	Andi Kleen <ak@...ell.com>
To:	Samuel Tardieu <sam@...1149.net>
Cc:	davids@...master.com,
	"Torvalds, Linus" <torvalds@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>
Subject: Re: Is gcc thread-unsafe?

On Thursday 25 October 2007 11:44:28 Samuel Tardieu wrote:
> >>>>> "Nick" == Nick Piggin <nickpiggin@...oo.com.au> writes:
> 
> Nick> Either way, I think we really need a way to turn it off for
> Nick> Linux.
> 
> Someone would need to add an option to disable the "cselim" pass in
> GCC tree-ssa-phiopt.c as far as I can tell from reading GCC source.

Note the test case was for 3.4.x which doesn't have tree-ssa at all.
It does if-conversion on the RTL level 

-Andi


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