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[MLIR][Python] Make the TypeID allocator globally defined in PassManager.add #162594

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Merged
merged 3 commits into from
Oct 9, 2025
Merged

[MLIR][Python] Make the TypeID allocator globally defined in PassManager.add #162594

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7b4be6c
[MLIR][Python] Make the TypeID allocator global defined in PassManage…
PragmaTwice Oct 9, 2025
3b3c3f6
move to PyGlobals
PragmaTwice Oct 9, 2025
c336e54
fix dtor
PragmaTwice Oct 9, 2025
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21 changes: 18 additions & 3 deletions mlir/lib/Bindings/Python/Pass.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,23 @@ class PyPassManager {
MlirPassManager passManager;
};

class PyTypeIDAllocator {
public:
PyTypeIDAllocator() : allocator(mlirTypeIDAllocatorCreate()) {}
~PyTypeIDAllocator() {
if (!allocator.ptr)
mlirTypeIDAllocatorDestroy(allocator);
}

MlirTypeIDAllocator get() { return allocator; }
MlirTypeID allocate() { return mlirTypeIDAllocatorAllocateTypeID(allocator); }

private:
MlirTypeIDAllocator allocator;
};

PyTypeIDAllocator globalTypeIDAllocator;

} // namespace

/// Create the `mlir.passmanager` here.
Expand Down Expand Up @@ -181,9 +198,7 @@ void mlir::python::populatePassManagerSubmodule(nb::module_ &m) {
name = nb::cast<std::string>(
nb::borrow<nb::str>(run.attr("__name__")));
}
MlirTypeIDAllocator typeIDAllocator = mlirTypeIDAllocatorCreate();
MlirTypeID passID =
mlirTypeIDAllocatorAllocateTypeID(typeIDAllocator);
MlirTypeID passID = globalTypeIDAllocator.allocate();
MlirExternalPassCallbacks callbacks;
callbacks.construct = [](void *obj) {
(void)nb::handle(static_cast<PyObject *>(obj)).inc_ref();
Expand Down