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      <base href="https://bugs.llvm.org/">
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    <body><span class="vcard"><a class="email" href="mailto:spatel+llvm@rotateright.com" title="Sanjay Patel <spatel+llvm@rotateright.com>"> <span class="fn">Sanjay Patel</span></a>
</span> changed
          <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - FP exception on optimized code"
   href="https://bugs.llvm.org/show_bug.cgi?id=40280">bug 40280</a>
          <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEW
           </td>
           <td>RESOLVED
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">CC</td>
           <td>
                
           </td>
           <td>spatel+llvm@rotateright.com
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>---
           </td>
           <td>INVALID
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - FP exception on optimized code"
   href="https://bugs.llvm.org/show_bug.cgi?id=40280#c1">Comment # 1</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - FP exception on optimized code"
   href="https://bugs.llvm.org/show_bug.cgi?id=40280">bug 40280</a>
              from <span class="vcard"><a class="email" href="mailto:spatel+llvm@rotateright.com" title="Sanjay Patel <spatel+llvm@rotateright.com>"> <span class="fn">Sanjay Patel</span></a>
</span></b>
        <pre>I think the source program encounters undefined behavior because:
<a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - clang/llvm don't support C99 FP rounding mode pragmas (FENV_ACCESS etc)"
   href="show_bug.cgi?id=8100#c15">https://bugs.llvm.org/show_bug.cgi?id=8100#c15</a>

Feel free to reopen if you disagree.

This is a long-standing problem for clang as you can see from that bug report
and related/duplicates. 

Work is ongoing to support an FP environment that includes exceptions. You can
check status of that on the llvm-dev mailing list.</pre>
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