<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 - hierarchical parallelism hangs"
   href="https://bugs.llvm.org/show_bug.cgi?id=49021">49021</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>hierarchical parallelism hangs
          </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>Created <span class=""><a href="attachment.cgi?id=24479" name="attach_24479" title="test source code">attachment 24479</a> <a href="attachment.cgi?id=24479&action=edit" title="test source code">[details]</a></span>
test source code

Jan 26 84c6f325840d363c6f3de2091771065234ce4146 works fine
Feb 03 e59d336e75f4670b1a702c2281b3fed27ba4c426 fails

clang++ -fopenmp -fopenmp-targets=nvptx64 -O3 test_omp_offload_reduction.cpp 
./a.out # hangs

-O2 works always fine.</pre>
        </div>
      </p>


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