<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 --- - The function type of thunks is wrong?"
   href="http://llvm.org/bugs/show_bug.cgi?id=16971">16971</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>The function type of thunks is wrong?
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </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>C++
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>timurrrr@google.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>I've noticed that for such a code:
  -----------------
  struct A {
    virtual void f();
  };

  struct B {
    virtual void f();
  };

  struct C : A, B {
    virtual void f();
  };

  void C::f() { }
  -----------------
the function type of the thunk is a bit wrong:
  -----------------
  define void @_ZThn8_N1C1fEv(%struct.C* %this) unnamed_addr #0 align 2 {
    ...
    %1 = getelementptr inbounds i8* %0, i64 -8
    %2 = bitcast i8* %1 to %struct.C*
    call void @_ZN1C1fEv(%struct.C* %2)
    ...
  -----------------
(as of r188899)

I believe it should be "define void @_ZThn8_N1C1fEv(%struct.B* %this)" instead.</pre>
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
      
      <ul>
          <li>You are on the CC list for the bug.</li>
      </ul>
    </body>
</html>