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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - LICM should be more careful about settings node origin's forExit"
href="https://bugs.webkit.org/show_bug.cgi?id=145062">145062</a>
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<th>Summary</th>
<td>LICM should be more careful about settings node origin's forExit
</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>Unspecified
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<th>OS</th>
<td>Unspecified
</td>
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>Normal
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<th>Priority</th>
<td>P2
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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>basile_clement@apple.com
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<p>
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<pre>This can be hit by running e.g. sunspider/access-nsieve with
DYLD_FRAMEWORK_PATH=WebKitBuild/Debug WebKitBuild/Debug/jsc --forceEagerCompilation=true --useFTLJIT=true --dumpGraphAtEachPhase=true
In this case, a Phi node is converted into a JSConstant by the DFGConstantFoldingPhase, and doesn't have a NodeOrigin.
Then it gets LICM'd, which unconditionally sets the NodeOrigin's forExit, and now we have a NodeOrigin with a set forExit and unset semantic, which we assert against in various places.</pre>
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