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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Sink real number type checks below the first arithmetic operation"
href="https://bugs.webkit.org/show_bug.cgi?id=145721">145721</a>
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<th>Summary</th>
<td>Sink real number type checks below the first arithmetic operation
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>528+ (Nightly build)
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
</td>
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<th>Component</th>
<td>JavaScriptCore
</td>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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</tr>
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<th>Reporter</th>
<td>fpizlo@apple.com
</td>
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<p>
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<pre>In cases like:
o.x + o.y
Where the two operands are likely real doubles, we currently do NaN checks for both operands before doing the addition. Instead, we could do the NaN check after speculatively doing the addition.</pre>
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