<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 --- - arm call generates incorrect code"
   href="http://llvm.org/bugs/show_bug.cgi?id=18112">18112</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>arm call generates incorrect code
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>3.3
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </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>new bugs
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>johnruble@gmail.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=11644" name="attach_11644" title="very small testcase demonstrating bug">attachment 11644</a> <a href="attachment.cgi?id=11644&action=edit" title="very small testcase demonstrating bug">[details]</a></span>
very small testcase demonstrating bug

the third param to a routine (follows a large pass-struct-by-value) doesn't
quite make it:


$ ./test_gcc 

addresses (caller): 0xbee27450 0xbee271f8 0xbee26fa0
addresses (callee): 0xbee27450 0xbee26d44 0xbee26fa0

$ ./test_clang 

addresses (caller): 0xbecfc450 0xbecfc1f8 0xbecfbfa0
addresses (callee): 0xbecfc450 0xbecfbd24 (nil)


(see attached testcase)


possibly related?:

<a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - byval should be implemented properly on ARM"
   href="show_bug.cgi?id=11018">http://llvm.org/bugs/show_bug.cgi?id=11018</a>
<a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - ARM struct byval size > 64 triggers failure"
   href="show_bug.cgi?id=16368">http://llvm.org/bugs/show_bug.cgi?id=16368</a>
<a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Bad ARM codegen when large structs passed by value, llc -O1."
   href="show_bug.cgi?id=12793">http://llvm.org/bugs/show_bug.cgi?id=12793</a>
<a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - ARM codegen generates incorrect code for byval function arguments"
   href="show_bug.cgi?id=8040">http://llvm.org/bugs/show_bug.cgi?id=8040</a></pre>
        </div>
      </p>
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