[flang] Use std::optional instead of None in comments (NFC)
authorKazu Hirata <kazu@google.com>
Sun, 11 Dec 2022 01:00:21 +0000 (17:00 -0800)
committerKazu Hirata <kazu@google.com>
Sun, 11 Dec 2022 01:00:21 +0000 (17:00 -0800)
commitc15a925ada41d80203735b8828f045215910aca4
tree32c1cf6fc02ee6a58b1fbdf71461369612667644
parentc824db46d4bc0e34cd365b94a5262145757080a9
[flang] Use std::optional instead of None in comments (NFC)

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716
flang/include/flang/Lower/IterationSpace.h
flang/lib/Optimizer/Transforms/SimplifyIntrinsics.cpp