[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, 5 insertions, 4 deletions

diff --git a/llvm/unittests/Frontend/OpenMPIRBuilderTest.cpp b/llvm/unittests/Frontend/OpenMPIRBuilderTest.cpp
index 7a68a01..64ff662 100644
--- a/llvm/unittests/Frontend/OpenMPIRBuilderTest.cpp
+++ b/llvm/unittests/Frontend/OpenMPIRBuilderTest.cpp
@@ -169,11 +169,12 @@ protected:
     BB = BasicBlock::Create(Ctx, "", F);
 
     DIBuilder DIB(*M);
-    auto File = DIB.createFile("test.dbg", "/src", llvm::None,
+    auto File = DIB.createFile("test.dbg", "/src", std::nullopt,
                                Optional<StringRef>("/src/test.dbg"));
     auto CU =
         DIB.createCompileUnit(dwarf::DW_LANG_C, File, "llvm-C", true, "", 0);
-    auto Type = DIB.createSubroutineType(DIB.getOrCreateTypeArray(None));
+    auto Type =
+        DIB.createSubroutineType(DIB.getOrCreateTypeArray(std::nullopt));
     auto SP = DIB.createFunction(
         CU, "foo", "", File, 1, Type, 1, DINode::FlagZero,
         DISubprogram::SPFlagDefinition | DISubprogram::SPFlagOptimized);
@@ -4127,7 +4128,7 @@ sumAtomicReduction(OpenMPIRBuilder::InsertPointTy IP, Type *Ty, Value *LHS,
                    Value *RHS) {
   IRBuilder<> Builder(IP.getBlock(), IP.getPoint());
   Value *Partial = Builder.CreateLoad(Ty, RHS, "red.partial");
-  Builder.CreateAtomicRMW(AtomicRMWInst::FAdd, LHS, Partial, None,
+  Builder.CreateAtomicRMW(AtomicRMWInst::FAdd, LHS, Partial, std::nullopt,
                           AtomicOrdering::Monotonic);
   return Builder.saveIP();
 }
@@ -4145,7 +4146,7 @@ xorAtomicReduction(OpenMPIRBuilder::InsertPointTy IP, Type *Ty, Value *LHS,
                    Value *RHS) {
   IRBuilder<> Builder(IP.getBlock(), IP.getPoint());
   Value *Partial = Builder.CreateLoad(Ty, RHS, "red.partial");
-  Builder.CreateAtomicRMW(AtomicRMWInst::Xor, LHS, Partial, None,
+  Builder.CreateAtomicRMW(AtomicRMWInst::Xor, LHS, Partial, std::nullopt,
                           AtomicOrdering::Monotonic);
   return Builder.saveIP();
 }