[mlir] Apply rule of five for Pass / OperationPass

Define all special member functions of C++ types (mlir::Pass and
mlir::OperationPass) since one of them is already provided.
As part of this, enable move semantics for these types as it
probably makes sense since copy semantics is present.

Co-authored-by: Asya Pronina <[email protected]>

Author: andrey-golubev

mlir/include/mlir/Pass/Pass.h

@@ -161,6 +161,13 @@ class Pass {
   explicit Pass(TypeID passID, std::optional<StringRef> opName = std::nullopt)
       : passID(passID), opName(opName) {}
   Pass(const Pass &other) : Pass(other.passID, other.opName) {}
+  Pass &operator=(const Pass &other) {
+    this->passID = other.passID;
+    this->opName = other.opName;
+    return *this;
+  }
+  Pass(Pass &&) = default;
+  Pass &operator=(Pass &&) = default;
 
   /// Returns the current pass state.
   detail::PassExecutionState &getPassState() {
@@ -352,6 +359,9 @@ class OperationPass : public Pass {
 protected:
   OperationPass(TypeID passID) : Pass(passID, OpT::getOperationName()) {}
   OperationPass(const OperationPass &) = default;
+  OperationPass &operator=(const OperationPass &) = default;
+  OperationPass(OperationPass &&) = default;
+  OperationPass &operator=(OperationPass &&) = default;
 
   /// Support isa/dyn_cast functionality.
   static bool classof(const Pass *pass) {
@@ -391,6 +401,9 @@ class OperationPass<void> : public Pass {
 protected:
   OperationPass(TypeID passID) : Pass(passID) {}
   OperationPass(const OperationPass &) = default;
+  OperationPass &operator=(const OperationPass &) = default;
+  OperationPass(OperationPass &&) = default;
+  OperationPass &operator=(OperationPass &&) = default;
 
   /// Indicate if the current pass can be scheduled on the given operation type.
   /// By default, generic operation passes can be scheduled on any operation.