<html>
    <head>
      <base href="https://llvm.org/bugs/" />
    </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 --- - [AVX-512] KNL bug at -O0"
   href="https://llvm.org/bugs/show_bug.cgi?id=30286">30286</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[AVX-512] KNL bug at -O0
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </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>new bugs
          </td>
        </tr>

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

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

        <tr>
          <th>CC</th>
          <td>guy.blank@intel.com, llvm-bugs@lists.llvm.org, Vsevolod.Livinskij@frtk.ru
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre><span class="quote">> cat pr.cpp</span >
#include <iostream>

struct S {
  unsigned long ul : 25 ;
} s;

int main () {
    s.ul = 27833667UL;
    bool b = ((bool)  !(((bool) s.ul ) && true)) && true;
    std::cout << (b ? "FAIL":"PASS") << "\n";
    return 0;
}

<span class="quote">> clang++ -O0 -o no_opt pr.cpp
> ./no_opt</span >
PASS
<span class="quote">> clang++ -O0 -march=knl -o knl_no_opt pr.cpp
>sde -knl -- ./knl_no_opt</span >
FAIL</pre>
        </div>
      </p>
      <hr>
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