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

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [r600g with -O3] layered-rendering/clear-color-all-types 3d single_level fails"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=78669">78669</a>
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>dri-devel@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[r600g with -O3] layered-rendering/clear-color-all-types 3d single_level fails
          </td>
        </tr>

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

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>david.heidelberger@ixit.cz
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

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

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

        <tr>
          <th>Component</th>
          <td>Drivers/Gallium/r600
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>Mesa
          </td>
        </tr></table>
      <p>
        <div>
        <pre>$ bin/gl-3.2-layered-rendering-clear-color-all-types 3d single_level -fbo -auto

Clearing each layer individually
Probing level 0, layer 0
Probing level 0, layer 1
Probing level 0, layer 2
Probing level 0, layer 3
Clearing all layers in miplevel 0 at once
Probing level 0, layer 0
Probing level 0, layer 1
Probing level 0, layer 2
Probe color at (0,0)
  Expected: 0.000000 1.000000 0.000000 1.000000
  Observed: 1.000000 0.000000 0.000000 1.000000
Probing level 0, layer 3
Probe color at (0,0)
  Expected: 0.000000 1.000000 0.000000 1.000000
  Observed: 1.000000 0.000000 0.000000 1.000000

This happen with mesa compiled with -O3. With -Og is perfectly fine.
Kernel: 3.12.18
Mesa: git (1646f4d0fb0efec04dce62b6dd4d974206acc8ac)
Card: Radeon HD 6550 (3870K APU)</pre>
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