Revert "WIP listeners", totally pushed by mistake!

This reverts commit 2e312a7baec5e8d8f841ee819966ff3f53f274c6.
Should never have been pushed here...

diff --git a/mlir/include/mlir/IR/Operation.h b/mlir/include/mlir/IR/Operation.h
index 3fbcfe8..59d450e 100644 (file)
--- a/mlir/include/mlir/IR/Operation.h
+++ b/mlir/include/mlir/IR/Operation.h
@@ -22,30 +22,6 @@
 #include <optional>
 
 namespace mlir {
-class IRListeners {
-public:
-  class ListenerInterface {
-   public:
-     ~ListenerInterface() = default;
-     virtual void notifyOpInserted(Operation *op, Block *oldBlock, Block *newBlock);
-     virtual void notifyOpDestroyed(Operation *op);
-  };
-  void notifyOpInserted(Operation *op, Block *oldBlock, Block *newBlock) { 
-    for (auto &listener : listeners)
-      listener.notifyOpInserted(op, oldBlock, newBlock);
-  }
-  void notifyOpDestroyed(Operation *op) {
-    for (auto &listener : listeners)
-      listener.notifyOpDestroyed(op);
-  }
-  void addListener(std::shared_ptr<ListenerInterface> listener) {
-    listeners.push_back(std::move(listener));
-  }
-  private:
-  std::vector<std::shared_ptr<ListenerInterface>> listeners;
-};
-
-
 /// Operation is the basic unit of execution within MLIR.
 ///
 /// The following documentation are recommended to understand this class:
@@ -759,12 +735,6 @@ private:
   /// Returns true if this operation has a valid order.
   bool hasValidOrder() { return orderIndex != kInvalidOrderIdx; }
 
-  /// Attach a listener to this operation.
-  void addListener(std::shared_ptr<ListenerInterface> listener) {
-    if (!listeners) listeners = std::make_unique<IRListeners>();
-    listeners->addListener(std::move(listener));
-  }
-
 private:
   Operation(Location location, OperationName name, unsigned numResults,
             unsigned numSuccessors, unsigned numRegions,
@@ -773,7 +743,7 @@ private:
   // Operations are deleted through the destroy() member because they are
   // allocated with malloc.
   ~Operation();
-g
+
   /// Returns the additional size necessary for allocating the given objects
   /// before an Operation in-memory.
   static size_t prefixAllocSize(unsigned numOutOfLineResults,
@@ -866,9 +836,6 @@ g
   /// This holds general named attributes for the operation.
   DictionaryAttr attrs;
 
-  /// Optionally defined listeners that register here to capture IR modification events.
-  std::unique_ptr<IRListeners> listeners;
-
   // allow ilist_traits access to 'block' field.
   friend struct llvm::ilist_traits<Operation>;
 

diff --git a/mlir/lib/IR/Operation.cpp b/mlir/lib/IR/Operation.cpp
index a700a54..50815b3 100644 (file)
--- a/mlir/lib/IR/Operation.cpp
+++ b/mlir/lib/IR/Operation.cpp
@@ -162,7 +162,6 @@ Operation::~Operation() {
 
 /// Destroy this operation or one of its subclasses.
 void Operation::destroy() {
-  if (listeners) listeners->notifyOpDestroyed(this);
   // Operations may have additional prefixed allocation, which needs to be
   // accounted for here when computing the address to free.
   char *rawMem = reinterpret_cast<char *>(this) -
@@ -381,9 +380,8 @@ Block *llvm::ilist_traits<::mlir::Operation>::getContainingBlock() {
 /// keep the block pointer up to date.
 void llvm::ilist_traits<::mlir::Operation>::addNodeToList(Operation *op) {
   assert(!op->getBlock() && "already in an operation block!");
-  auto oldBlock = op->block;
   op->block = getContainingBlock();
-  if (listeners) listeners->notifyOpInserted(op, oldBlock, newBlock);
+
   // Invalidate the order on the operation.
   op->orderIndex = Operation::kInvalidOrderIdx;
 }
@@ -392,7 +390,6 @@ void llvm::ilist_traits<::mlir::Operation>::addNodeToList(Operation *op) {
 /// We keep the block pointer up to date.
 void llvm::ilist_traits<::mlir::Operation>::removeNodeFromList(Operation *op) {
   assert(op->block && "not already in an operation block!");
-  if (listeners) listeners->notifyOpRemoved(op);
   op->block = nullptr;
 }