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    <body><span class="vcard"><a class="email" href="mailto:richard-llvm@metafoo.co.uk" title="Richard Smith <richard-llvm@metafoo.co.uk>"> <span class="fn">Richard Smith</span></a>

</span> changed

              <a class="bz_bug_link 

          bz_status_REOPENED "

   title="REOPENED --- - char-copying loop should optimize to memcpy"

   href="http://llvm.org/bugs/show_bug.cgi?id=16716">bug 16716</a>

        <br>

             <table border="1" cellspacing="0" cellpadding="8">

          <tr>

            <th>What</th>

            <th>Removed</th>

            <th>Added</th>

          </tr>


         <tr>

           <td style="text-align:right;">Status</td>

           <td>RESOLVED

           </td>

           <td>REOPENED

           </td>

         </tr>


         <tr>

           <td style="text-align:right;">CC</td>

           <td>

                
           </td>

           <td>richard-llvm@metafoo.co.uk

           </td>

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         <tr>

           <td style="text-align:right;">Resolution</td>

           <td>INVALID

           </td>

           <td>---

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            <b><a class="bz_bug_link 

          bz_status_REOPENED "

   title="REOPENED --- - char-copying loop should optimize to memcpy"

   href="http://llvm.org/bugs/show_bug.cgi?id=16716#c3">Comment # 3</a>

              on <a class="bz_bug_link 

          bz_status_REOPENED "

   title="REOPENED --- - char-copying loop should optimize to memcpy"

   href="http://llvm.org/bugs/show_bug.cgi?id=16716">bug 16716</a>

              from <span class="vcard"><a class="email" href="mailto:richard-llvm@metafoo.co.uk" title="Richard Smith <richard-llvm@metafoo.co.uk>"> <span class="fn">Richard Smith</span></a>

</span></b>

        <pre>(In reply to <a href="show_bug.cgi?id=16716#c2">comment #2</a>)

<span class="quote">> Specifically, I'm saying that we can't idiom recognize the function based on

> its definition alone.  We can inline it into call sites and gain aliasing

> information from it, of course.</span >


OK, but we're failing to do so in the first 'foo' function. This looks like a

legitimate bug, and seems to be a pass ordering issue: running 'opt -O2' on the

output of 'clang -O2' is enough to get the function to be optimized to a

bitcast.</pre>

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