[Bf-committers] MSVC official builds, optimisation and render errors

[Eugene Reilly]

Throwing my hat into the ring - I just tested the test file in the bug
report, and my builds [1] using MSVC 8 (Visual Express 2005) don't
have any dots like in the image on BA.  I use use /O2 /fp:fast (except
on the elbeem and src projects), SSE2, and largeaddressaware.  So
though /O2 alone might be the culprit, it seems that this combination
doesn't cause a problem for me.  Of course, using these flags for a
release wouldn't be the way to go, but at least we can start tracking
down what's really happening.

[1] http://www.graphicall.org/builds/builds/showbuild.php?action=show&id=419

Eugene (etr9j)

> Message: 9
> Date: Wed, 25 Jul 2007 18:31:26 +0100
> From: Simon Clitherow <aphex at nildram.co.uk>
> Subject: Re: [Bf-committers] MSVC official builds, optimisation and
>        render errors
> To: bf-blender developers <bf-committers at blender.org>
> Message-ID: <46A788EE.7020705 at nildram.co.uk>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi,
>
> Tested this today with VS2005 and the error occurs when using /O2
> optimization.  When using no optimization or /O1, the error is gone. VC
> is not performing any other fancy optimizations beyond these flags.
> I've played around with floating-point precision flags, inline expansion
> flags, etc, but nothing seems to touch it.
>
> So, the question is - do we resort to /O1 for this windows release?
>
> Does anyone have thoughts on this?  When did this error first appear?
>
> Simon