[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, 7 insertions, 7 deletions

diff --git a/mlir/lib/Rewrite/ByteCode.cpp b/mlir/lib/Rewrite/ByteCode.cpp
index 6b11220..1ea4bef 100644
--- a/mlir/lib/Rewrite/ByteCode.cpp
+++ b/mlir/lib/Rewrite/ByteCode.cpp
@@ -487,13 +487,13 @@ struct ByteCodeLiveRange {
   std::unique_ptr<llvm::IntervalMap<uint64_t, char, 16>> liveness;
 
   /// The operation range storage index for this range.
-  Optional<unsigned> opRangeIndex;
+  std::optional<unsigned> opRangeIndex;
 
   /// The type range storage index for this range.
-  Optional<unsigned> typeRangeIndex;
+  std::optional<unsigned> typeRangeIndex;
 
   /// The value range storage index for this range.
-  Optional<unsigned> valueRangeIndex;
+  std::optional<unsigned> valueRangeIndex;
 };
 } // namespace
 
@@ -1107,7 +1107,7 @@ public:
   LogicalResult
   execute(PatternRewriter &rewriter,
           SmallVectorImpl<PDLByteCode::MatchResult> *matches = nullptr,
-          Optional<Location> mainRewriteLoc = {});
+          std::optional<Location> mainRewriteLoc = {});
 
 private:
   /// Internal implementation of executing each of the bytecode commands.
@@ -1450,11 +1450,11 @@ LogicalResult ByteCodeExecutor::executeApplyRewrite(PatternRewriter &rewriter) {
 
     // If the result is a range, we need to copy it over to the bytecodes
     // range memory.
-    if (Optional<TypeRange> typeRange = result.dyn_cast<TypeRange>()) {
+    if (std::optional<TypeRange> typeRange = result.dyn_cast<TypeRange>()) {
       unsigned rangeIndex = read();
       typeRangeMemory[rangeIndex] = *typeRange;
       memory[read()] = &typeRangeMemory[rangeIndex];
-    } else if (Optional<ValueRange> valueRange =
+    } else if (std::optional<ValueRange> valueRange =
                    result.dyn_cast<ValueRange>()) {
       unsigned rangeIndex = read();
       valueRangeMemory[rangeIndex] = *valueRange;
@@ -2110,7 +2110,7 @@ void ByteCodeExecutor::executeSwitchTypes() {
 LogicalResult
 ByteCodeExecutor::execute(PatternRewriter &rewriter,
                           SmallVectorImpl<PDLByteCode::MatchResult> *matches,
-                          Optional<Location> mainRewriteLoc) {
+                          std::optional<Location> mainRewriteLoc) {
   while (true) {
     // Print the location of the operation being executed.
     LLVM_DEBUG(llvm::dbgs() << readInline<Location>() << "\n");