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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - REGRESSION(201900): validation failure for GetByOffset/PutByOffset in VALIDATE((node), node->child1().node() == node->child2().node() || node->child1()->result() == NodeResultStorage)"
href="https://bugs.webkit.org/show_bug.cgi?id=159603">159603</a>
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<th>Summary</th>
<td>REGRESSION(201900): validation failure for GetByOffset/PutByOffset in VALIDATE((node), node->child1().node() == node->child2().node() || node->child1()->result() == NodeResultStorage)
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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>WebKit Nightly Build
</td>
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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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
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>fpizlo@apple.com
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<pre>This validation rule is broken. It should always be valid to take:
Foo(@x, @x)
and turn it into:
a: ValueRep(@x)
b: ValueRep(@x)
Foo(@a, @b)
or:
y: Identity(@x)
Foo(@x, @y)
That's because it should be possible to rewire any data flow edge something that produces an equivalent value. This validation rule means that such rewirings are invalid on GetByOffset/PutByOffset.</pre>
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