[llvm] 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/ExecutionEngine/Interpreter/Interpreter.cpp b/llvm/lib/ExecutionEngine/Interpreter/Interpreter.cpp
index 5727f7a..d4235cf 100644
--- a/llvm/lib/ExecutionEngine/Interpreter/Interpreter.cpp
+++ b/llvm/lib/ExecutionEngine/Interpreter/Interpreter.cpp
@@ -69,7 +69,7 @@ Interpreter::~Interpreter() {
 
 void Interpreter::runAtExitHandlers () {
   while (!AtExitHandlers.empty()) {
-    callFunction(AtExitHandlers.back(), None);
+    callFunction(AtExitHandlers.back(), std::nullopt);
     AtExitHandlers.pop_back();
     run();
   }