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    <head>
      <base href="http://llvm.org/bugs/" />
    </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 --- - Integrated-as fails to assemble these (presumably legitimate) instructions"
   href="http://llvm.org/bugs/show_bug.cgi?id=18921">18921</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Integrated-as fails to assemble these (presumably legitimate) instructions
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>trunk
          </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>Backend: ARM
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>simon.hosie@arm.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=12096" name="attach_12096" title="instructions emitted by gcc">attachment 12096</a> <a href="attachment.cgi?id=12096&action=edit" title="instructions emitted by gcc">[details]</a></span>
instructions emitted by gcc

I've swept together a bunch of instructions which GCC emitted but which Clang's
integrated-as rejects (GNU assembler does not).  Most of them it says need ARM
mode, but there are a couple of invalid operands which I assume are "oversized"
immediates.

This is in Thumb mode.  Perhaps these are being filtered against the original
Thumb mode, rather than Thumb2?

I suspect that gcc could be performing some instruction substitutions which
aren't officially part of the language.

I haven't pared the list down because I'm afraid I might remove something
important, like a specific register number.</pre>
        </div>
      </p>
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