[Bug 105704] compiler assertion hit

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105704

Ian Romanick <idr at freedesktop.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #6 from Ian Romanick <idr at freedesktop.org> ---
Fixed by:

commit 91225cb33f0baede872114bd416084b3b52937a1
Author: Ian Romanick <ian.d.romanick at intel.com>
Date:   Fri Mar 23 11:46:12 2018 -0700

    i965/vec4: Fix null destination register in 3-source instructions

    A recent commit (see below) triggered some cases where conditional
    modifier propagation and dead code elimination would cause a MAD
    instruction like the following to be generated:

        mad.l.f0  null, ...

    Matt pointed out that fs_visitor::fixup_3src_null_dest() fixes cases
    like this in the scalar backend.  This commit basically ports that code
    to the vec4 backend.

    NOTE: I have sent a couple tests to the piglit list that reproduce this
    bug *without* the commit mentioned below.  This commit fixes those
    tests.

    Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
    Reviewed-by: Matt Turner <mattst88 at gmail.com>
    Tested-by: Tapani Pälli <tapani.palli at intel.com>
    Cc: mesa-stable at lists.freedesktop.org
    Fixes: ee63933a7 ("nir: Distribute binary operations with constants into
bcsel")
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105704

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