[ARM] Use std::optional in ARMISelDAGToDAG.cpp (NFC)
authorKazu Hirata <kazu@google.com>
Sat, 26 Nov 2022 06:45:26 +0000 (22:45 -0800)
committerKazu Hirata <kazu@google.com>
Sat, 26 Nov 2022 06:45:26 +0000 (22:45 -0800)
commitac7af9a0b871cad581210464121552ba072809f7
treebcf5734739d03d1c4b62414f13a9bc3518858ee8
parentaad2d272bf9e57bfc01c546224ca531783c0373b
[ARM] Use std::optional in ARMISelDAGToDAG.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/Target/ARM/ARMISelDAGToDAG.cpp