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<body><span class="vcard"><a class="email" href="mailto:spatel+llvm@rotateright.com" title="Sanjay Patel <spatel+llvm@rotateright.com>"> <span class="fn">Sanjay Patel</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - combineInsertEltToShuffle - ASSERT: idx < size()"
href="https://bugs.llvm.org/show_bug.cgi?id=44139">bug 44139</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
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<td style="text-align:right;">Fixed By Commit(s)</td>
<td>
</td>
<td>214683f3b2d6
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - combineInsertEltToShuffle - ASSERT: idx < size()"
href="https://bugs.llvm.org/show_bug.cgi?id=44139#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - combineInsertEltToShuffle - ASSERT: idx < size()"
href="https://bugs.llvm.org/show_bug.cgi?id=44139">bug 44139</a>
from <span class="vcard"><a class="email" href="mailto:spatel+llvm@rotateright.com" title="Sanjay Patel <spatel+llvm@rotateright.com>"> <span class="fn">Sanjay Patel</span></a>
</span></b>
<pre>(In reply to Simon Pilgrim from <a href="show_bug.cgi?id=44139#c2">comment #2</a>)
<span class="quote">> I'm guessing DAGCombine is missing out of bounds insert/extractelement
> handling compared to instsimplify:
>
> Opt codegen: <a href="https://gcc.godbolt.org/z/uDSBW8">https://gcc.godbolt.org/z/uDSBW8</a></span >
Yep - I thought I might've created the loophole that allowed the crash, but it
exists independently of:
<a href="https://reviews.llvm.org/rG85a2146c1559">https://reviews.llvm.org/rG85a2146c1559</a>
Always surprised at the order that we can perform combines vs. creating
nodes...
so I might've introduced a different bug by deleting a clause from DAGCombiner
in that patch.
Will try to keep an eye on fuzzer mail.
Should be fixed with:
<a href="https://reviews.llvm.org/rG214683f3b2d6">https://reviews.llvm.org/rG214683f3b2d6</a></pre>
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