[mlir] Use std::optional instead of llvm::Optional (NFC)

This patch replaces (llvm::|)Optional< with std::optional<.  I'll post
a separate patch to remove #include "llvm/ADT/Optional.h".

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/mlir/lib/Dialect/Linalg/Transforms/DataLayoutPropagation.cpp b/mlir/lib/Dialect/Linalg/Transforms/DataLayoutPropagation.cpp
index 0c6e9fb74a35..48053545b638 100644
--- a/mlir/lib/Dialect/Linalg/Transforms/DataLayoutPropagation.cpp
+++ b/mlir/lib/Dialect/Linalg/Transforms/DataLayoutPropagation.cpp
@@ -44,13 +44,13 @@ struct PackInfo {
   llvm::DenseMap<int64_t, int64_t> tileToPointMapping;
   // The permutation of outer dims (on domain).
   SmallVector<int64_t> outerDimsOnDomainPerm;
-  Optional<Value> paddingValue;
+  std::optional<Value> paddingValue;
 };
 
 static PackInfo getPackingInfoFromConsumer(
     AffineMap indexingMap, ArrayRef<OpFoldResult> innerTileSizes,
     ArrayRef<int64_t> innerDimsPos, ArrayRef<int64_t> outerDimsPerm,
-    Optional<Value> paddingValue = std::nullopt) {
+    std::optional<Value> paddingValue = std::nullopt) {
   LLVM_DEBUG(
       { llvm::dbgs() << "--- Construct PackInfo From A Consumer ---\n"; });
   PackInfo packInfo;