<html>
    <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 --- - UNREACHABLE executed at RegAllocFast.cpp:362"
   href="http://llvm.org/bugs/show_bug.cgi?id=21700">21700</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>UNREACHABLE executed at RegAllocFast.cpp:362
          </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>Common Code Generator Code
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>serge.guelton@telecom-bretagne.eu
          </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=13412" name="attach_13412" title="faulty bytecode">attachment 13412</a> <a href="attachment.cgi?id=13412&action=edit" title="faulty bytecode">[details]</a></span>
faulty bytecode

The bytecode in attachment raises the following assert when compiled with
clang-3.5


Instruction uses an allocated register
UNREACHABLE executed at
/home/sguelton/sources/llvm-3.5/lib/CodeGen/RegAllocFast.cpp:362!

Turning all i32 into i64 fixes the issue, but according to the doc, GEP should
work for i32 indices.

compiling the code with llc does *not* trigger the bug...</pre>
        </div>
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