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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Commit 4457345 causes 2 DrawElements test regressions"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=88247">88247</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Commit 4457345 causes 2 DrawElements test regressions
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>Mesa
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>git
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Drivers/DRI/i965
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>idr@freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>michael.w.mason@intel.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-3d-bugs@lists.freedesktop.org
          </td>
        </tr></table>
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        <div>
        <pre>Environment:
Mesa: (master 934e41c0b31cffa4efc08f61cff2389e3149b3f3)
Ubuntu 14.04

Commit 4457345 "i965/vec4: Add pass to gather constants into a vector-float
MOV" caused regressions in the following 2 DrawElements tests:

dEQP-GLES3.functional.shaders.texture_functions.texturegradoffset.sampler2dshadow_vertex
dEQP-GLES3.functional.shaders.texture_functions.texturegradoffset.sampler2darrayshadow_vertex


Analysis:

Bisect shows 44573458bdc52acc304fb75d6df502312b8e149c is the first bad commit.

Author: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
Date:   Sat Dec 20 11:50:31 2014 -0800

    i965/vec4: Add pass to gather constants into a vector-float MOV.

    Currently only handles consecutive instructions with the same
    destination that collectively write all channels.

    total instructions in shared programs: 5879798 -> 5869011 (-0.18%)
    instructions in affected programs:     465236 -> 454449 (-2.32%)

    Reviewed-by: Ian Romanick <<a href="mailto:ian.d.romanick@intel.com">ian.d.romanick@intel.com</a>>


Steps to reproduce:

# ./deqp-gles3
--deqp-case=dEQP-GLES3.functional.shaders.texture_functions.texturegradoffset.sampler2dshadow_vertex
# ./deqp-gles3
--deqp-case=dEQP-GLES3.functional.shaders.texture_functions.texturegradoffset.sampler2darrayshadow_vertex</pre>
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