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      <base href="https://bugs.llvm.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Regalloc assert fails: Unexpected VNI"
   href="https://bugs.llvm.org/show_bug.cgi?id=34502">34502</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Regalloc assert fails: Unexpected VNI
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libraries
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>3.9
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

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

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

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Register Allocator
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>paulsson@linux.vnet.ibm.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=19112" name="attach_19112" title="reduced testcase">attachment 19112</a> <a href="attachment.cgi?id=19112&action=edit" title="reduced testcase">[details]</a></span>
reduced testcase

This is actually a bug that may have kept the SystemZ build bots red for some
time now, but due to vacations this has not been reported yet. So this is quite
urgent.

I have done a git bisect, and found that it seems that commit 463fa38
(trunk@311401) is the cause for this.

The attached reduced test case fails with that commit, but compiles if it's
reverted.

bin/llc -mcpu=z13 -O3 hoistspills_crash.ll</pre>
        </div>
      </p>


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