<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 - __builtin_popcount(~a) & 1 - > __builtin_popcount(a) & 1"
   href="https://bugs.llvm.org/show_bug.cgi?id=50096">50096</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>__builtin_popcount(~a) & 1 - > __builtin_popcount(a) & 1
          </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>Scalar Optimizations
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>david.bolvansky@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>----------------------------------------
define i32 @src(i32 %0) noread nowrite nofree {
%1:
  %2 = xor i32 %0, 4294967295
  %3 = ctpop i32 %2
  %4 = and i32 %3, 1
  ret i32 %4
}
=>
define i32 @tgt(i32 %0) noread nowrite nofree {
%1:
  %2 = ctpop i32 %0
  %3 = and i32 %2, 1
  ret i32 %3
}
Transformation seems to be correct!

<a href="https://godbolt.org/z/hGoxxYYd6">https://godbolt.org/z/hGoxxYYd6</a></pre>
        </div>
      </p>


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