[mlir] Use std::optional instead of llvm::Optional (NFC)
authorKazu Hirata <kazu@google.com>
Thu, 16 Feb 2023 03:40:10 +0000 (19:40 -0800)
committerKazu Hirata <kazu@google.com>
Thu, 16 Feb 2023 03:40:10 +0000 (19:40 -0800)
commit5382d28815d8a2e328aa1b2d77595a2d52c91ac1
treea975e54f310741c4aa50e345828b69907781ff6f
parent43059255ce537050619307c28a7b69afa20d03d4
[mlir] Use std::optional instead of llvm::Optional (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/Vector/Transforms/VectorTransforms.cpp