<html>
    <head>
      <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 - _Atomic array parameters"
   href="https://bugs.llvm.org/show_bug.cgi?id=39690">39690</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>_Atomic array parameters
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>6.0
          </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>Frontend
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>jens.gustedt@inria.fr
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The C standard allows any qualification inside the first array dimension of an
array parameter. The following code is correct C

_Atomic(void (*)(void)) a;
double e(double A[const static 1]){
  double *const* a = &A;
  return **a;
}
double f(double A[_Atomic static 1]){
  double *_Atomic* a = &A;
  return **a;
}

but gets a warning from clang 6.0 for f but none for e.

gcc compiles this without any diagnostic as it should.

Thanks

Jens</pre>
        </div>
      </p>


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