[RISCV] Use std::optional in RISCVISelDAGToDAG.cpp (NFC)
authorKazu Hirata <kazu@google.com>
Sat, 26 Nov 2022 07:02:26 +0000 (23:02 -0800)
committerKazu Hirata <kazu@google.com>
Sat, 26 Nov 2022 07:02:26 +0000 (23:02 -0800)
commit362ca6cbefd752dd8b6727708383c5418cb239ea
tree1656a275d067441fc8eca9e4caaf5185468d4a94
parent7e008206863f3e274966c1dba1edfc0db1ed0cb3
[RISCV] Use std::optional in RISCVISelDAGToDAG.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/RISCV/RISCVISelDAGToDAG.cpp