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    <body><span class="vcard"><a class="email" href="mailto:regehr@cs.utah.edu" title="John Regehr <regehr@cs.utah.edu>"> <span class="fn">John Regehr</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED WORKSFORME - LVI should understand conditional branches where the condition is a conjunction or disjunction"
   href="https://llvm.org/bugs/show_bug.cgi?id=27296">bug 27296</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>NEW
           </td>
           <td>RESOLVED
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>---
           </td>
           <td>WORKSFORME
           </td>
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        <div>
            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED WORKSFORME - LVI should understand conditional branches where the condition is a conjunction or disjunction"
   href="https://llvm.org/bugs/show_bug.cgi?id=27296#c5">Comment # 5</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED WORKSFORME - LVI should understand conditional branches where the condition is a conjunction or disjunction"
   href="https://llvm.org/bugs/show_bug.cgi?id=27296">bug 27296</a>
              from <span class="vcard"><a class="email" href="mailto:regehr@cs.utah.edu" title="John Regehr <regehr@cs.utah.edu>"> <span class="fn">John Regehr</span></a>
</span></b>
        <pre>Well.... I made a fix for this which intersected any constant ranges found in a
tree of and instructions on taken branch of a conditional, and in a tree of or
instructions found on the false branch of a conditional. This logic fires a lot
but the increase in precision is very unimpressive and so are the resulting
optimizations. For example across all of SPEC CINT 2006 the binary size is
reduced by a few hundred bytes as a result of the added LVI precision. So
overall the benefit of this patch doesn't seem to outweigh the extra
complexity.</pre>
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