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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [MemorySSA][SimpleUnswitch]Assertion `!NodePtr->isKnownSentinel()' failed"
href="https://bugs.llvm.org/show_bug.cgi?id=43569">43569</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[MemorySSA][SimpleUnswitch]Assertion `!NodePtr->isKnownSentinel()' failed
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jji@us.ibm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>$cat t.c
short a;
int b;
void c() {
for (;;) {
b = 0;
for (; b < a; b++)
;
}
}
$clang -fprofile-instr-generate -O3 -fexperimental-new-pass-manager -mllvm
-enable-nontrivial-unswitch t.c -c
llvm-project/llvm/include/llvm/ADT/ilist_iterator.h:139:
llvm::ilist_iterator::reference
llvm::ilist_iterator<llvm::ilist_detail::node_options<llvm::Instruction, true,
false, void>, false, false>::operator*() const [OptionsT =
llvm::ilist_detail::node_options<llvm::Instruction, true, false, void>,
IsReverse = false, IsConst = false]: Assertion `!NodePtr->isKnownSentinel()'
failed.
Assert in llvm::MemorySSAUpdater::moveAllAccesses.</pre>
</div>
</p>
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