[CodeGen] Use std::nullopt instead of None (NFC)

This patch mechanically replaces None with std::nullopt where the
compiler would warn if None were deprecated.  The intent is to reduce
the amount of manual work required in migrating from Optional to
std::optional.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/MachineOperand.cpp b/llvm/lib/CodeGen/MachineOperand.cpp
index bc3a491..bc2a7a8 100644
--- a/llvm/lib/CodeGen/MachineOperand.cpp
+++ b/llvm/lib/CodeGen/MachineOperand.cpp
@@ -749,7 +749,7 @@ void MachineOperand::print(raw_ostream &OS, LLT TypeToPrint,
                            const TargetIntrinsicInfo *IntrinsicInfo) const {
   tryToGetTargetInfo(*this, TRI, IntrinsicInfo);
   ModuleSlotTracker DummyMST(nullptr);
-  print(OS, DummyMST, TypeToPrint, None, /*PrintDef=*/false,
+  print(OS, DummyMST, TypeToPrint, std::nullopt, /*PrintDef=*/false,
         /*IsStandalone=*/true,
         /*ShouldPrintRegisterTies=*/true,
         /*TiedOperandIdx=*/0, TRI, IntrinsicInfo);