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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - opt -early-cse sometimes crashing with Assertion `!Result || (LHS.isSentinel() && LHS.Inst == RHS.Inst) || getHashValueImpl(LHS) == getHashValueImpl(RHS)'"
href="https://bugs.llvm.org/show_bug.cgi?id=42280">42280</a>
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<th>Summary</th>
<td>opt -early-cse sometimes crashing with Assertion `!Result || (LHS.isSentinel() && LHS.Inst == RHS.Inst) || getHashValueImpl(LHS) == getHashValueImpl(RHS)'
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>mikael.holmen@ericsson.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=22100" name="attach_22100" title="reproducer">attachment 22100</a> <a href="attachment.cgi?id=22100&action=edit" title="reproducer">[details]</a></span>
reproducer
Running
opt -early-cse -o /dev/null './reduced3.ll'
sometimes crashes with
opt: ../lib/Transforms/Scalar/EarlyCSE.cpp:353: static bool
llvm::DenseMapInfo<(anonymous namespace)::SimpleValue>::isEqual((anonymous
namespace)::SimpleValue, (anonymous namespace)::SimpleValue): Assertion
`!Result || (LHS.isSentinel() && LHS.Inst == RHS.Inst) || getHashValueImpl(LHS)
== getHashValueImpl(RHS)' failed.
Usually it crashes within 30 attempts but sometimes it takes a lot more.
(On earlier versions of the compiler it crashed like once in 3000 attempts so
we seem to be "lucky" with current trunk version r363355)
The input can for sure be reduced more but it's a bit messy since it's not
crashing all the time.</pre>
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