[Scalar] Use std::optional in LoopFlatten.cpp (NFC)
authorKazu Hirata <kazu@google.com>
Sat, 26 Nov 2022 08:02:40 +0000 (00:02 -0800)
committerKazu Hirata <kazu@google.com>
Sat, 26 Nov 2022 08:02:40 +0000 (00:02 -0800)
commitbba55813fc4e080cd9e4fa7781c611cf41fe7abb
tree6edd3476f128cadd5b77231b53ab745234f7f4d7
parent7fc772bbdc34ced480bef9aa6043f8e0980bb522
[Scalar] Use std::optional in LoopFlatten.cpp (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
llvm/lib/Transforms/Scalar/LoopFlatten.cpp