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    <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 - Failure to detect pblendvb pattern"
   href="https://bugs.llvm.org/show_bug.cgi?id=47404">47404</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Failure to detect pblendvb pattern
          </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>enhancement
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>Backend: X86
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>gabravier@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, spatel+llvm@rotateright.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>typedef char v16i8 __attribute__((vector_size(16)));

v16i8 blend_epi8(v16i8 x, v16i8 y, v16i8 mask)
{
    v16i8 tmp = (mask < 0);
    return (v16i8)((~tmp & x) | (tmp & y));
}

This can can be optimized to `return __builtin_ia32_pblendvb128(x, y, mask);`.
This transformation is done by GCC, but not by LLVM.</pre>
        </div>
      </p>


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