<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 - declare target fails to emit diagnostic when identifier redeclared"
   href="https://bugs.llvm.org/show_bug.cgi?id=33087">33087</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>declare target fails to emit diagnostic when identifier redeclared
          </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>normal
          </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>andrey.vul@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The test case shown below should emit the diagnostic "error: 'rc' must not
appear in both clauses 'to' and 'link'", but it fails to do so when 'rc' is
declared multiple times.

Test case:
int rc;
#pragma omp declare target link(rc)
#ifndef OK
int rc;
#endif
#pragma omp declare target to(rc)

This has been reproduced in Clang 4.0 for both PowerPC and amd64.

The diagnostician is failing to check against all declarations of an identifier
in its handling of declare target.</pre>
        </div>
      </p>


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