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From: Dimitry Andric <dim@FreeBSD.org>
Subject: Re: ports/178977: x11-drivers/xf86-video-intel: Assertion failed:
 (TheLoop-&gt; getLoopPreheader()
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The following reply was made to PR ports/178977; it has been noted by GNATS.

From: Dimitry Andric <dim@FreeBSD.org>
To: "O. Hartmann" <ohartman@zedat.fu-berlin.de>
Cc: bug-followup@FreeBSD.org
Subject: Re: ports/178977: x11-drivers/xf86-video-intel:  Assertion failed: (TheLoop-&gt;getLoopPreheader()
Date: Sat, 25 May 2013 21:00:58 +0200

 On May 25, 2013, at 20:44, "O. Hartmann" <ohartman@zedat.fu-berlin.de> =
 wrote:
 > On Sat, 2013-05-25 at 20:17 +0200, Dimitry Andric wrote:
 >> This looks like <http://llvm.org/bugs/show_bug.cgi?id=3D16139>, a bug =
 in
 >> the vectorizer (which is enabled by default at -O3).
 ...
 >>  =
 <http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Vectorize/L=
 oopVectorize.cpp?view=3Dpatch&r1=3D182656&r2=3D182655&pathrev=3D182656>
 >>=20
 >> and rebuild clang:
 >>=20
 >>  cd /usr/src/lib/clang/libllvmvectorize && make
 >>  cd /usr/src/usr.bin/clang/clang && make && sudo make install
 >=20
 > With the patch applied, x11-drivers/xf86-video-intel builds, but I can
 > not say whether it works, since I have no X11 on an Intel iGPU.
 >=20
 > Thanks, the issue should be closed due to my -O3 compiling. Or marked
 > fixed with the provided patch?
 
 I will import the fix for clang from upstream.  I also think it will go
 into the 3.3 branch, but better to fix the issue now, before too many
 people encounter it...