<html>
    <head>
      <base href="https://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 --- - std::allocator should use sized-delete"
   href="https://llvm.org/bugs/show_bug.cgi?id=26945">26945</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>std::allocator should use sized-delete
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>libc++
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </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>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>All Bugs
          </td>
        </tr>

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

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

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>This is the implementation of std::allocator<T>::deallocate from
<a href="http://llvm.org/svn/llvm-project/libcxx/trunk/include/memory">http://llvm.org/svn/llvm-project/libcxx/trunk/include/memory</a> : 

    _LIBCPP_INLINE_VISIBILITY void deallocate(pointer __p, size_type) _NOEXCEPT
        {_VSTD::__deallocate((void*)__p);}

This is suboptimal for toolchains that implement an optimized sized-delete
(that is, ::operator delete(void *ptr, size_t s).)

I think this should invoke 

_VSTD::__deallocate((void *)__p, size * sizeof(T))

or something similar (with the obvious implementation of sized __deallocate.)</pre>
        </div>
      </p>
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