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    <head>
      <base href="https://llvm.org/bugs/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Canonicalize C99 cos(x) -> @llvm.cos in SimplifyLibCalls"
   href="https://llvm.org/bugs/show_bug.cgi?id=31567">31567</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Canonicalize C99 cos(x) -> @llvm.cos in SimplifyLibCalls
          </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>normal
          </td>
        </tr>

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

        <tr>
          <th>Component</th>
          <td>Scalar Optimizations
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>davide@freebsd.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, simon.f.whittaker@gmail.com
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>We already do simplification on the intrinsic in InstCombine, e.g.
cos(-x) -> cos(x)
cos(fabs(x)) -> cos(x)

If we lower C99 cos(x) -> @llvm.cos we don't need to do the same simplifcations
in SimplifyLibCalls.</pre>
        </div>
      </p>
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