[Bug 92214] Flightgear crashes during splashboot with R600 driver, LLVM 3.7.0 and mesa 11.0.2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92214

--- Comment #32 from Roland Scheidegger <sroland at vmware.com> ---
(In reply to Barto from comment #31)
> llvm developper ( Craig Topper ) has answered this :
> 
> https://llvm.org/bugs/show_bug.cgi?id=25021#c8
> 
> he said that the remove of the SSE4 test for penryn CPUs ( including pentium
> dual core who don't support SSE4 ) was intentional,
> 
> he advices mesa developpers to use the llvm function "getHostCPUFeatures()"
> in order to check if the CPU can support SSE4, before doing a llvm operation
> ( like a binary code generation ),
> 
> I check in mesa source code and it seems that mesa developpers don't use
> this function "getHostCPUFeatures()",

We do our own feature detection, though so far we didn't really tell llvm which
features it's allowed to use as we were relying on this getting detected
automatically.
I believe the patch posted by Jose here,
http://lists.freedesktop.org/archives/mesa-dev/2015-October/097948.html should
help.

(Though this bug appears to have nothing to do at all with the originally
posted issue)

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