[Mlir-commits] [mlir] [MLIR] [Python] A few minor fixes to type annotations (PR #187956)

[Sergei Lebedev]

https://github.com/superbobry created https://github.com/llvm/llvm-project/pull/187956

* ir.IntegerAttr.value is now an int
* ir.Value.type correctly returns a value of type _T
* ir.OpView.build_generic returns ir.Operation, which matches the implementation.

>From e0db636d60ef61a4d901f1d99ad4c5e3f9d508e9 Mon Sep 17 00:00:00 2001
From: Sergei Lebedev <slebedev at google.com>
Date: Sun, 22 Mar 2026 22:34:17 +0000
Subject: [PATCH] [MLIR] [Python] A few minor fixes to type annotations

* ir.IntegerAttr.value is now an int
* ir.Value.type correctly returns a value of type _T
* ir.OpView.build_generic returns ir.Operation, which matches the
  implementation.
---
 mlir/include/mlir/Bindings/Python/IRAttributes.h | 2 +-
 mlir/include/mlir/Bindings/Python/IRCore.h       | 2 +-
 mlir/lib/Bindings/Python/IRAttributes.cpp        | 4 ++--
 mlir/lib/Bindings/Python/IRCore.cpp              | 6 +++---
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/mlir/include/mlir/Bindings/Python/IRAttributes.h b/mlir/include/mlir/Bindings/Python/IRAttributes.h
index 64a31d3f3e42d..28a7134dc2d45 100644
--- a/mlir/include/mlir/Bindings/Python/IRAttributes.h
+++ b/mlir/include/mlir/Bindings/Python/IRAttributes.h
@@ -342,7 +342,7 @@ class MLIR_PYTHON_API_EXPORTED PyIntegerAttribute
   static void bindDerived(ClassTy &c);
 
 private:
-  static nanobind::object toPyInt(PyIntegerAttribute &self);
+  static nanobind::int_ toPyInt(PyIntegerAttribute &self);
 };
 
 /// Bool Attribute subclass - BoolAttr.
diff --git a/mlir/include/mlir/Bindings/Python/IRCore.h b/mlir/include/mlir/Bindings/Python/IRCore.h
index f24b3c6ac6f80..55d6f61324500 100644
--- a/mlir/include/mlir/Bindings/Python/IRCore.h
+++ b/mlir/include/mlir/Bindings/Python/IRCore.h
@@ -739,7 +739,7 @@ class MLIR_PYTHON_API_EXPORTED PyOpView : public PyOperationBase {
 
   nanobind::object getOperationObject() { return operationObject; }
 
-  static nanobind::object
+  static nanobind::typed<nanobind::object, PyOperation>
   buildGeneric(std::string_view name, std::tuple<int, bool> opRegionSpec,
                nanobind::object operandSegmentSpecObj,
                nanobind::object resultSegmentSpecObj,
diff --git a/mlir/lib/Bindings/Python/IRAttributes.cpp b/mlir/lib/Bindings/Python/IRAttributes.cpp
index a0cfaa441bfbf..9f5602cc61b35 100644
--- a/mlir/lib/Bindings/Python/IRAttributes.cpp
+++ b/mlir/lib/Bindings/Python/IRAttributes.cpp
@@ -426,7 +426,7 @@ void PyIntegerAttribute::bindDerived(ClassTy &c) {
   });
 }
 
-nb::object PyIntegerAttribute::toPyInt(PyIntegerAttribute &self) {
+nb::int_ PyIntegerAttribute::toPyInt(PyIntegerAttribute &self) {
   MlirType type = mlirAttributeGetType(self);
   unsigned bitWidth = mlirIntegerAttrGetValueBitWidth(self);
 
@@ -463,7 +463,7 @@ nb::object PyIntegerAttribute::toPyInt(PyIntegerAttribute &self) {
     }
   }
 
-  return result;
+  return nb::cast<nb::int_>(result);
 }
 
 void PyBoolAttribute::bindDerived(ClassTy &c) {
diff --git a/mlir/lib/Bindings/Python/IRCore.cpp b/mlir/lib/Bindings/Python/IRCore.cpp
index 89e1e21cd1240..f3f1ee4ce343f 100644
--- a/mlir/lib/Bindings/Python/IRCore.cpp
+++ b/mlir/lib/Bindings/Python/IRCore.cpp
@@ -1591,7 +1591,7 @@ static MlirValue getOpResultOrValue(nb::handle operand) {
   throw nb::value_error("is not a Value");
 }
 
-nb::object PyOpView::buildGeneric(
+nb::typed<nb::object, PyOperation> PyOpView::buildGeneric(
     std::string_view name, std::tuple<int, bool> opRegionSpec,
     nb::object operandSegmentSpecObj, nb::object resultSegmentSpecObj,
     std::optional<nb::list> resultTypeList, nb::list operandList,
@@ -4844,12 +4844,12 @@ void populateIRCore(nb::module_ &m) {
           "Returns the string form of value as an operand (i.e., the ValueID).")
       .def_prop_ro(
           "type",
-          [](PyValue &self) -> nb::typed<nb::object, PyType> {
+          [](PyValue &self) {
             return PyType(self.getParentOperation()->getContext(),
                           mlirValueGetType(self.get()))
                 .maybeDownCast();
           },
-          "Returns the type of the value.")
+          "Returns the type of the value.", nb::sig("def type(self) -> _T"))
       .def(
           "set_type",
           [](PyValue &self, const PyType &type) {