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<body><span class="vcard"><a class="email" href="mailto:idr@freedesktop.org" title="Ian Romanick <idr@freedesktop.org>"> <span class="fn">Ian Romanick</span></a>
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<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - compiler assertion hit"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105704">bug 105704</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
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<td style="text-align:right;">Status</td>
<td>ASSIGNED
</td>
<td>RESOLVED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - compiler assertion hit"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105704#c6">Comment # 6</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - compiler assertion hit"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105704">bug 105704</a>
from <span class="vcard"><a class="email" href="mailto:idr@freedesktop.org" title="Ian Romanick <idr@freedesktop.org>"> <span class="fn">Ian Romanick</span></a>
</span></b>
<pre>Fixed by:
commit 91225cb33f0baede872114bd416084b3b52937a1
Author: Ian Romanick <<a href="mailto:ian.d.romanick@intel.com">ian.d.romanick@intel.com</a>>
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 <<a href="mailto:ian.d.romanick@intel.com">ian.d.romanick@intel.com</a>>
Reviewed-by: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
Tested-by: Tapani Pälli <<a href="mailto:tapani.palli@intel.com">tapani.palli@intel.com</a>>
Cc: <a href="mailto:mesa-stable@lists.freedesktop.org">mesa-stable@lists.freedesktop.org</a>
Fixes: ee63933a7 ("nir: Distribute binary operations with constants into
bcsel")
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - compiler assertion hit"
href="show_bug.cgi?id=105704">https://bugs.freedesktop.org/show_bug.cgi?id=105704</a></pre>
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