https://bugs.llvm.org/show_bug.cgi?id=43569
Bug ID: 43569
Summary: [MemorySSA][SimpleUnswitch]Assertion
`!NodePtr->isKnownSentinel()' failed
Product: libraries
Version: trunk
Hardware: Other
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: j...@us.ibm.com
CC: llvm-bugs@lists.llvm.org
$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.
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