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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 - std::complex support in offload region needed"
   href="https://bugs.llvm.org/show_bug.cgi?id=45003">45003</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>std::complex support in offload region needed
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>OpenMP
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </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>Clang Compiler Support
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>xw111luoye@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre><a href="https://github.com/ye-luo/openmp-target/blob/master/hands-on/tests/complex/complex.cpp">https://github.com/ye-luo/openmp-target/blob/master/hands-on/tests/complex/complex.cpp</a>

I cannot test this on x86 due to math header issue but I can test on power 9.
So far std::complex doesn't work at all.
[<a href="mailto:yeluo@login3.summit">yeluo@login3.summit</a> complex]$ clang++ -g -O3 -fopenmp
-fopenmp-targets=nvptx64-nvidia-cuda -ffast-math complex.cpp 
[<a href="mailto:yeluo@login3.summit">yeluo@login3.summit</a> complex]$ ./a.out 
wrong a * b (0,0), correct value (-0.3,0.5)
[<a href="mailto:yeluo@login3.summit">yeluo@login3.summit</a> complex]$ clang++ -g -O3 -fopenmp
-fopenmp-targets=nvptx64-nvidia-cuda complex.cpp 
nvlink error   : Undefined reference to '__mulsc3' in
'/tmp/complex-5ceac3.cubin'
clang-11: error: nvlink command failed with exit code 255 (use -v to see
invocation)</pre>
        </div>
      </p>


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