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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - R257164 Causing Segfault in Firebird and LibreOffice in "Combine redundant instructions" pass"
   href="https://llvm.org/bugs/show_bug.cgi?id=26573">26573</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>R257164 Causing Segfault in Firebird and LibreOffice in "Combine redundant instructions" pass
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>3.8
          </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>new bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>lukebenes@hotmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=15879" name="attach_15879" title="Firebird build log">attachment 15879</a> <a href="attachment.cgi?id=15879&action=edit" title="Firebird build log">[details]</a></span>
Firebird build log

I discovered this bug when I upgraded to 257311 using the official Ubuntu 14.04
nightly packages. After the upgrade, clang would crash in the "Combine
redundant instructions" pass. I was able to bisect this regression down to
257164 with my own builds of clang. 

Steps to reproduce:
1. $ git clone git://anongit.freedesktop.org/libreoffice/core
2. $ git checkout libreoffice-5-1 (optional, master fails with same errors)
3. $ apt-get build-dep libreoffice ( also lo_usefull Shell Script if missing
dep)
4. create file autogen.input with CC=clang and CXX=clang++
5 ./autogen.sh && make</pre>
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