<html>
    <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 - unnamed_addr wrapper function not removed"
   href="https://bugs.llvm.org/show_bug.cgi?id=50045">50045</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>unnamed_addr wrapper function not removed
          </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>All
          </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>Interprocedural Optimizations
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>richard-llvm@metafoo.co.uk
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Testcase:


@foo = global void ()* @bar

declare void @baz();

define internal void @bar() unnamed_addr {
    tail call void @baz()
    ret void
}


I would expect this to be optimized to:


@foo = global void ()* @baz

declare void @baz();


... but it is not. This comes up in C++ for cases such as:

void f();
auto *p = +[]{ f(); }

... where the language rules permit marking the static invoker for the lambda
as unnamed_addr -- the only constraints are on the behavior of the returned
pointer, not on its valid. (Clang doesn't do this yet.)</pre>
        </div>
      </p>


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