More than a week ago, after updating mesa, I began experiencing trouble
launching Serious Sam 3. Bisecting gave me the following:

696229523d919de15ebc25d0f475bf56d7dad4a9 is the first bad commit
commit 696229523d919de15ebc25d0f475bf56d7dad4a9
Author: Marek Olšák <marek.olsak@amd.com>
Date:   Thu Dec 12 18:09:08 2013 +0100

    r600g: use shader-based MSAA resolving when hw-based one cannot be used

    This fixes some MSAA integer tests.

:040000 040000 b04b89764c5edee6dd685e22d47e36a11060583f
147827de9fe4e00bae5cc5844052b4fc45bb396c M    src

However, setting R600_LLVM=0 prevent the crash.

Using an HD6950 (Cayman) on kernel 3.13-rc5 with latest drm and ddx from git on
ArchLinux 64bit.