[Analysis] Use std::optional in AffineStructures.cpp (NFC)
authorKazu Hirata <kazu@google.com>
Sat, 10 Dec 2022 18:44:51 +0000 (10:44 -0800)
committerKazu Hirata <kazu@google.com>
Sat, 10 Dec 2022 18:44:51 +0000 (10:44 -0800)
commit4b0e11679c67ab27935a0fffff467adfcb23b309
treea223210ce9c3245501d1de4486202a354dfe3794
parenta9a1b45b3c2ef0a44a56cb6e677e4daa4b29fbc6
[Analysis] Use std::optional in AffineStructures.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
mlir/lib/Dialect/Affine/Analysis/AffineStructures.cpp