[Mlir-commits] [mlir] [mlir][Transforms][NFC] Turn in-place op modification into `IRRewrite` (PR #81245)

[Matthias Springer]

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@@ -1031,8 +992,50 @@ class MoveOperationRewrite : public OperationRewrite {
   // this operation was the only operation in the region.
   Operation *insertBeforeOp;
 };
+
+/// In-place modification of an op. This rewrite is immediately reflected in
+/// the IR. The previous state of the operation is stored in this object.
+class ModifyOperationRewrite : public OperationRewrite {
+public:
+  ModifyOperationRewrite(ConversionPatternRewriterImpl &rewriterImpl,
+                         Operation *op)
+      : OperationRewrite(Kind::ModifyOperation, rewriterImpl, op),
+        loc(op->getLoc()), attrs(op->getAttrDictionary()),
+        operands(op->operand_begin(), op->operand_end()),
+        successors(op->successor_begin(), op->successor_end()) {}
+
+  static bool classof(const IRRewrite *rewrite) {
+    return rewrite->getKind() == Kind::ModifyOperation;
+  }
+
+  /// Discard the transaction state and reset the state of the original
+  /// operation.
+  void rollback() override {
+    op->setLoc(loc);
+    op->setAttrs(attrs);
+    op->setOperands(operands);
+    for (const auto &it : llvm::enumerate(successors))
+      op->setSuccessor(it.value(), it.index());
+  }
+
+private:
+  LocationAttr loc;
+  DictionaryAttr attrs;
----------------
matthias-springer wrote:

I made it a separate PR (#82474), so that this PR can stay NFC.

https://github.com/llvm/llvm-project/pull/81245