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      <base href="https://bugs.llvm.org/">
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [X86][SSE] Adjust shouldFoldShiftPairToMask for btver2 targets for uniform constant shifts"
   href="https://bugs.llvm.org/show_bug.cgi?id=40758">40758</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[X86][SSE] Adjust shouldFoldShiftPairToMask for btver2 targets for uniform constant shifts
          </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>Windows NT
          </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>llvm-dev@redking.me.uk
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>andrea.dibiagio@gmail.com, craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, spatel+llvm@rotateright.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>As discussed on <a href="https://reviews.llvm.org/D58225">https://reviews.llvm.org/D58225</a>, for the btver2 (Jaguar) target
(and maybe some others), it would be better to use 2 uniform constant shifts
than a shift and a mask loaded from constant pool (even if the mask is lifted
out of a hot loop I don't think it gives any benefit).

This probably means yet another Feature bit.....</pre>
        </div>
      </p>


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