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    <head>
      <base href="http://llvm.org/bugs/" />
    </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 --- - Only generate .ARM.exidx and .ARM.extab when needed in EHABI"
   href="http://llvm.org/bugs/show_bug.cgi?id=18710">18710</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Only generate .ARM.exidx and .ARM.extab when needed in EHABI
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>trunk
          </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>Backend: ARM
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>renato.golin@linaro.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Currently, when compiling C code on ARM, the EH sections .ARM.exidx is being
generated when it shouldn't.

The rules for generating the sections, AFAIK, are:

* .ARM.extab only if the function can unwind (ie. no leaf, C++, etc)
* .ARM.exidx only if there is one or more .ARM.extabs

The rule for generating .ARM.extab looks correct, but the .ARM.exidx is always
there, probably an artefact due to EHABI never been enabled by default until
now.</pre>
        </div>
      </p>
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