ports/178977: x11-drivers/xf86-video-intel: Assertion failed: (TheLoop-> getLoopPreheader()

[Dimitry Andric]

The following reply was made to PR ports/178977; it has been noted by GNATS.

From: Dimitry Andric <dim at FreeBSD.org>
To: bug-followup at FreeBSD.org,
 ohartman at zedat.fu-berlin.de
Cc:  
Subject: Re: ports/178977: x11-drivers/xf86-video-intel:  Assertion failed: (TheLoop->getLoopPreheader()
Date: Sat, 25 May 2013 20:17:17 +0200

 This looks like <http://llvm.org/bugs/show_bug.cgi?id=3D16139>, a bug in
 the vectorizer (which is enabled by default at -O3).  Can you please
 post the /tmp/sna_accel-cXtZCu.c and /tmp/sna_accel-cXtZCu.sh files it
 has dropped?
 
 If you are feeling adventurous, apply the following patch to
 contrib/llvm:
 
   =
 <http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Vectorize/L=
 oopVectorize.cpp?view=3Dpatch&r1=3D182656&r2=3D182655&pathrev=3D182656>
 
 and rebuild clang:
 
   cd /usr/src/lib/clang/libllvmvectorize && make
   cd /usr/src/usr.bin/clang/clang && make && sudo make install