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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 - MCWinCOFFStreamer::EmitAssemblerFlag not implemented"
   href="https://bugs.llvm.org/show_bug.cgi?id=34752">34752</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>MCWinCOFFStreamer::EmitAssemblerFlag not implemented
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libraries
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>3.9
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>Windows NT
          </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>MC
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>aartz@blizzard.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=19207" name="attach_19207" title="wow64 far call test">attachment 19207</a> <a href="attachment.cgi?id=19207&action=edit" title="wow64 far call test">[details]</a></span>
wow64 far call test

MCWinCOFFStreamer::EmitAssemblerFlag causes clang/llvm to segfault on windows
when you attempt to use any assembler flag (code64/code32/etc)

I assumed this was due to some greater incompatibility, but i copied the
functionality from the MACHO/ELF streamer and it is able to successfully
compile 64-bit code in a 32-bit binary.

I am wondering if this was merely overlooked or if it's simply unsupported due
to some compatibility issue on another layer.

I tagged the version at 3.9 because I'm using 3.9.0 final, but looking at 5.0
it seems the issue (if there is one at all) persists.

Attached is a test case that compiles and functions properly when
EmitAssemblerFlag is "enabled"</pre>
        </div>
      </p>


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