<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 - reinterpret_cast doesn't work between vector and scalar"
   href="https://bugs.llvm.org/show_bug.cgi?id=47977">47977</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>reinterpret_cast doesn't work between vector and scalar
          </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>enhancement
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>OpenCL
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>marco.antognini@arm.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>anastasia.stulova@arm.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>In C++ for OpenCL, the following program doesn't compile:

int2 foo(long x) {
    return reinterpret_cast<int2>(x);
}


The error is: reinterpret_cast from scalar 'long' to vector 'int2' (vector of 2
'int' values) of different size

This is unexpected. The error message is also wrong: both long and int2 have
the same size.

Replacing the cast with a C-cast works.

<a href="https://godbolt.org/z/K7vcv4">https://godbolt.org/z/K7vcv4</a></pre>
        </div>
      </p>


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