[llvm/unittests] 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/unittests/IR/VerifierTest.cpp b/llvm/unittests/IR/VerifierTest.cpp
index c4977a9..cca29e84 100644
--- a/llvm/unittests/IR/VerifierTest.cpp
+++ b/llvm/unittests/IR/VerifierTest.cpp
@@ -240,7 +240,7 @@ TEST(VerifierTest, DetectInvalidDebugInfo) {
 
 TEST(VerifierTest, MDNodeWrongContext) {
   LLVMContext C1, C2;
-  auto *Node = MDNode::get(C1, None);
+  auto *Node = MDNode::get(C1, std::nullopt);
 
   Module M("M", C2);
   auto *NamedNode = M.getOrInsertNamedMetadata("test");