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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 --- - alignment specifier ignored on enum definitions"
   href="http://llvm.org/bugs/show_bug.cgi?id=22279">22279</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>alignment specifier ignored on enum definitions
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </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>C++11
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>richard-llvm@metafoo.co.uk
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Consider:

  enum alignas(64) X : int {} x;
  static_assert(alignof(X) == 64, "");

This fails: the assert fires, and if you remove it, we generate code that has
an underaligned global 'x'.

Same thing happens for __attribute__((aligned(N))) (but in that case, we're at
least being GCC-compatible).

Conversely, consider:

  typedef __attribute__((aligned(64))) N;
  enum X : N {} x;

Here, we *do* apply the alignment to X. It's not obvious whether we should. GCC
does. EDG does not.</pre>
        </div>
      </p>
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