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[MLIR][Python][NOMERGE] demo finding live ops via nanobind internals #160632

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[MLIR][Python][NOMERGE] demo finding live ops via nanobind internals #160632

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3 changes: 3 additions & 0 deletions mlir/examples/standalone/python/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -152,3 +152,6 @@ if(NOT EXTERNAL_PROJECT_BUILD)
add_dependencies(StandalonePythonModules "${_mlir_typestub_gen_target}")
endif()
add_dependencies(StandalonePythonModules "${_standaloneDialectsNanobind_typestub_gen_target}")

target_include_directories(StandalonePythonModules.extension._mlir.dso PRIVATE ${NB_DIR}/ext/robin_map/include)
target_include_directories(StandalonePythonModules.extension._mlir.dso PRIVATE ${NB_DIR}/src)
32 changes: 32 additions & 0 deletions mlir/lib/Bindings/Python/IRCore.cpp
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Expand Up @@ -2897,6 +2897,36 @@ maybeGetTracebackLocation(const std::optional<PyLocation> &location) {
// Populates the core exports of the 'ir' submodule.
//------------------------------------------------------------------------------

#include "nb_internals.h"

auto print_live_op = [](void *k, PyObject *v) {
nb::handle op_py_type = nb::type<PyOperation>();
nb::handle maybe_op_inst{v};
nb::str end{" "};
if (maybe_op_inst.type().is(op_py_type)) {
nb::print("found live operation:", end);
nb::print(maybe_op_inst);
}
};

void print_live_ops() noexcept {
nanobind::detail::nb_internals *p = nanobind::detail::internals;
for (size_t i = 0; i < p->shard_count; ++i) {
nanobind::detail::nb_shard &s = p->shards[i];
nanobind::detail::lock_shard lock(s);
for (auto [k, v] : s.inst_c2p) {
if (NB_UNLIKELY(nanobind::detail::nb_is_seq(v))) {
nanobind::detail::nb_inst_seq *seq = nanobind::detail::nb_get_seq(v);
for (; seq != nullptr; seq = seq->next) {
print_live_op(k, seq->inst);
}
} else {
print_live_op(k, (PyObject *)v);
}
}
}
}

void mlir::python::populateIRCore(nb::module_ &m) {
// disable leak warnings which tend to be false positives.
nb::set_leak_warnings(false);
Expand Down Expand Up @@ -4475,4 +4505,6 @@ void mlir::python::populateIRCore(nb::module_ &m) {
PyErr_SetObject(PyExc_Exception, obj.ptr());
}
});

m.def("print_live_ops", &print_live_ops);
}
3 changes: 3 additions & 0 deletions mlir/python/CMakeLists.txt
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Expand Up @@ -974,3 +974,6 @@ add_dependencies(MLIRPythonModules "${_mlir_typestub_gen_target}")
if(MLIR_INCLUDE_TESTS)
add_dependencies(MLIRPythonModules "${_mlirPythonTestNanobind_typestub_gen_target}")
endif()
message(STATUS "NB_DIR=${NB_DIR}")
target_include_directories(MLIRPythonModules.extension._mlir.dso PRIVATE ${NB_DIR}/ext/robin_map/include)
target_include_directories(MLIRPythonModules.extension._mlir.dso PRIVATE ${NB_DIR}/src)
4 changes: 4 additions & 0 deletions mlir/test/python/dialects/memref.py
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Expand Up @@ -179,6 +179,10 @@ def testSubViewOpInferReturnTypeSemantics():
# CHECK: %{{.*}} = memref.subview %[[DYNAMICALLOC]][1, 1] [3, 3] [1, 1] : memref<10x10xi32, strided<[10, 1], offset: ?>> to memref<3x3xi32, strided<[10, 1], offset: ?>>
print(y.owner)

# CHECK: %subview_10 = memref.subview
# CHECK: %0 = arith.addi %c3_2, %c4_3 : index
print_live_ops()


# CHECK-LABEL: TEST: testSubViewOpInferReturnTypeExtensiveSlicing
@run
Expand Down
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