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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [SNB/IVB/HSW/BYT/HSW Bisected]Ogles3conform/GL3Tests_shadow_shadow_execution_vert.test fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=76617">76617</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>idr@freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>mattst88@gmail.com
</td>
</tr>
<tr>
<th>Summary</th>
<td>[SNB/IVB/HSW/BYT/HSW Bisected]Ogles3conform/GL3Tests_shadow_shadow_execution_vert.test fails
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>Drivers/DRI/i965
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=96396" name="attach_96396" title="output">attachment 96396</a> <a href="attachment.cgi?id=96396&action=edit" title="output">[details]</a></span>
output
System Environment:
--------------------------
Platform: Haswell
Libdrm:
(master)libdrm-2.4.52-10-g1cb5fc706cf5913d9dee33c939f65a23ecea17a5
Mesa: (master)7683fce8781ef0169333c5ee1276392d058cfaa8
Xserver:
(master)xorg-server-1.15.99.901-129-gbf087659f0fb747c471e26c5b287c35877818040
Xf86_video_intel:(master)2.99.911-3-g220accd828c5a0054ae9e3b491a434f7a6c750e0
Cairo: (master)bb17403622e9ea474017e0039af8ee48b2b285db
Libva: (staging)bf2e1773d4373619232c4c653b8cda19ea329441
Libva_intel_driver:(staging)b1319c7f7cb9d20179b20dac2308330bd0e51ffe
Kernel: (drm-intel-nightly)84295583b8322f96a187c4fc5cca5dd7d511f57e
Bug detailed description:
-----------------------------
It fails on Sandybridge, Ivybridge, Haswell, Baytrail and broadwell with mesa
master branch.It doesn't happen on mesa 10.1 branch.
Bisect shows:9630ba6c6e754b438cf67c7d76ec1c99488df3ba is the first bad commit.
commit 9630ba6c6e754b438cf67c7d76ec1c99488df3ba
Author: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
AuthorDate: Tue Mar 11 13:14:08 2014 -0700
Commit: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
CommitDate: Mon Mar 24 11:06:26 2014 -0700
i965/vec4: Let dead code eliminate trim dead channels.
That is, modify
mad dst, a, b, c
to be
mad dst.xyz, a, b, c
if dst.w is never read.
total instructions in shared programs: 811869 -> 805582 (-0.77%)
instructions in affected programs: 168287 -> 162000 (-3.74%)
Reviewed-by: Eric Anholt <<a href="mailto:eric@anholt.net">eric@anholt.net</a>>
Reproduce steps:
----------------------------
1. xinit
2. ./GTF -width=64 -height=64 -run=GL3Tests/shadow/shadow_execution_vert.test</pre>
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