[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, 2 insertions, 2 deletions

diff --git a/llvm/lib/ExecutionEngine/Orc/SpeculateAnalyses.cpp b/llvm/lib/ExecutionEngine/Orc/SpeculateAnalyses.cpp
index 80145b1..0076267 100644
--- a/llvm/lib/ExecutionEngine/Orc/SpeculateAnalyses.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/SpeculateAnalyses.cpp
@@ -97,7 +97,7 @@ BlockFreqQuery::ResultTy BlockFreqQuery::operator()(Function &F) {
   auto IBBs = findBBwithCalls(F);
 
   if (IBBs.empty())
-    return None;
+    return std::nullopt;
 
   auto &BFI = FAM.getResult<BlockFrequencyAnalysis>(F);
 
@@ -288,7 +288,7 @@ SpeculateQuery::ResultTy SequenceBBQuery::operator()(Function &F) {
 
   CallerBlocks = findBBwithCalls(F);
   if (CallerBlocks.empty())
-    return None;
+    return std::nullopt;
 
   if (isStraightLine(F))
     SequencedBlocks = rearrangeBB(F, CallerBlocks);