[Bug 79616] New: L4D2 crash on startup

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79616

          Priority: medium
            Bug ID: 79616
          Assignee: idr at freedesktop.org
           Summary: L4D2 crash on startup
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: lemody at gmail.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/DRI/i965
           Product: Mesa

L4D2 crashes with current Mesa master, I'm getting:

---- 8< ---
hl2_linux: intel_mipmap_tree.c:1881: intel_miptree_map_movntdqa: Assertion
`(((uintptr_t) map->ptr) & 15) == misalignment' failed.
---- 8< ---

I bisected this to the following commit:

commit f935dfc022f2481b3ed6ecfccafef37ce71776f0
Author: Matt Atwood <matthew.s.atwood at intel.com>
Date:   Fri May 2 09:44:45 2014 -0700

    i965: Use SSE4.1 runtime detection for intel_miptree_map.

    Previous it was a compile-time decision.

    Reviewed-by: Matt Turner <mattst88 at gmail.com>

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