[SelectionDAG] Use std::optional in DAGCombiner.cpp (NFC)
authorKazu Hirata <kazu@google.com>
Sat, 26 Nov 2022 23:00:23 +0000 (15:00 -0800)
committerKazu Hirata <kazu@google.com>
Sat, 26 Nov 2022 23:00:23 +0000 (15:00 -0800)
commitdd698b7777e11be5c11e59898dfd77765a0e9bc9
treed5bf5196786e525dc497c3edf9483abc973268f9
parentd77ecb675b647b54ba142be043b17139f62be6f7
[SelectionDAG] Use std::optional in DAGCombiner.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/CodeGen/SelectionDAG/DAGCombiner.cpp