[Transforms] 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, 4 insertions, 4 deletions

diff --git a/llvm/lib/Transforms/Scalar/LoopFuse.cpp b/llvm/lib/Transforms/Scalar/LoopFuse.cpp
index 70903f5..5f64260 100644
--- a/llvm/lib/Transforms/Scalar/LoopFuse.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopFuse.cpp
@@ -645,7 +645,7 @@ private:
   void collectFusionCandidates(const LoopVector &LV) {
     for (Loop *L : LV) {
       TTI::PeelingPreferences PP =
-          gatherPeelingPreferences(L, SE, TTI, None, None);
+          gatherPeelingPreferences(L, SE, TTI, std::nullopt, std::nullopt);
       FusionCandidate CurrCand(L, DT, &PDT, ORE, PP);
       if (!CurrCand.isEligibleForFusion(SE))
         continue;
@@ -708,14 +708,14 @@ private:
     if (isa<SCEVCouldNotCompute>(TripCount0)) {
       UncomputableTripCount++;
       LLVM_DEBUG(dbgs() << "Trip count of first loop could not be computed!");
-      return {false, None};
+      return {false, std::nullopt};
     }
 
     const SCEV *TripCount1 = SE.getBackedgeTakenCount(FC1.L);
     if (isa<SCEVCouldNotCompute>(TripCount1)) {
       UncomputableTripCount++;
       LLVM_DEBUG(dbgs() << "Trip count of second loop could not be computed!");
-      return {false, None};
+      return {false, std::nullopt};
     }
 
     LLVM_DEBUG(dbgs() << "\tTrip counts: " << *TripCount0 << " & "
@@ -740,7 +740,7 @@ private:
       LLVM_DEBUG(dbgs() << "Loop(s) do not have a single exit point or do not "
                            "have a constant number of iterations. Peeling "
                            "is not benefical\n");
-      return {false, None};
+      return {false, std::nullopt};
     }
 
     Optional<unsigned> Difference;