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//===- IRModule.cpp - IR pybind module ------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "IRModule.h"
#include <optional>
#include <vector>
#include "Globals.h"
#include "NanobindUtils.h"
#include "mlir-c/Support.h"
#include "mlir/Bindings/Python/Nanobind.h"
#include "mlir-c/Bindings/Python/Interop.h" // This is expected after nanobind.
namespace nb = nanobind;
using namespace mlir;
using namespace mlir::python;
// -----------------------------------------------------------------------------
// PyGlobals
// -----------------------------------------------------------------------------
PyGlobals *PyGlobals::instance = nullptr;
PyGlobals::PyGlobals() {
assert(!instance && "PyGlobals already constructed");
instance = this;
// The default search path include {mlir.}dialects, where {mlir.} is the
// package prefix configured at compile time.
dialectSearchPrefixes.emplace_back(MAKE_MLIR_PYTHON_QUALNAME("dialects"));
}
PyGlobals::~PyGlobals() { instance = nullptr; }
bool PyGlobals::loadDialectModule(llvm::StringRef dialectNamespace) {
{
nb::ft_lock_guard lock(mutex);
if (loadedDialectModules.contains(dialectNamespace))
return true;
}
// Since re-entrancy is possible, make a copy of the search prefixes.
std::vector<std::string> localSearchPrefixes = dialectSearchPrefixes;
nb::object loaded = nb::none();
for (std::string moduleName : localSearchPrefixes) {
moduleName.push_back('.');
moduleName.append(dialectNamespace.data(), dialectNamespace.size());
try {
loaded = nb::module_::import_(moduleName.c_str());
} catch (nb::python_error &e) {
if (e.matches(PyExc_ModuleNotFoundError)) {
continue;
}
throw;
}
break;
}
if (loaded.is_none())
return false;
// Note: Iterator cannot be shared from prior to loading, since re-entrancy
// may have occurred, which may do anything.
nb::ft_lock_guard lock(mutex);
loadedDialectModules.insert(dialectNamespace);
return true;
}
void PyGlobals::registerAttributeBuilder(const std::string &attributeKind,
nb::callable pyFunc, bool replace) {
nb::ft_lock_guard lock(mutex);
nb::object &found = attributeBuilderMap[attributeKind];
if (found && !replace) {
throw std::runtime_error((llvm::Twine("Attribute builder for '") +
attributeKind +
"' is already registered with func: " +
nb::cast<std::string>(nb::str(found)))
.str());
}
found = std::move(pyFunc);
}
void PyGlobals::registerTypeCaster(MlirTypeID mlirTypeID,
nb::callable typeCaster, bool replace) {
nb::ft_lock_guard lock(mutex);
nb::object &found = typeCasterMap[mlirTypeID];
if (found && !replace)
throw std::runtime_error("Type caster is already registered with caster: " +
nb::cast<std::string>(nb::str(found)));
found = std::move(typeCaster);
}
void PyGlobals::registerValueCaster(MlirTypeID mlirTypeID,
nb::callable valueCaster, bool replace) {
nb::ft_lock_guard lock(mutex);
nb::object &found = valueCasterMap[mlirTypeID];
if (found && !replace)
throw std::runtime_error("Value caster is already registered: " +
nb::cast<std::string>(nb::repr(found)));
found = std::move(valueCaster);
}
void PyGlobals::registerDialectImpl(const std::string &dialectNamespace,
nb::object pyClass) {
nb::ft_lock_guard lock(mutex);
nb::object &found = dialectClassMap[dialectNamespace];
if (found) {
throw std::runtime_error((llvm::Twine("Dialect namespace '") +
dialectNamespace + "' is already registered.")
.str());
}
found = std::move(pyClass);
}
void PyGlobals::registerOperationImpl(const std::string &operationName,
nb::object pyClass, bool replace) {
nb::ft_lock_guard lock(mutex);
nb::object &found = operationClassMap[operationName];
if (found && !replace) {
throw std::runtime_error((llvm::Twine("Operation '") + operationName +
"' is already registered.")
.str());
}
found = std::move(pyClass);
}
std::optional<nb::callable>
PyGlobals::lookupAttributeBuilder(const std::string &attributeKind) {
nb::ft_lock_guard lock(mutex);
const auto foundIt = attributeBuilderMap.find(attributeKind);
if (foundIt != attributeBuilderMap.end()) {
assert(foundIt->second && "attribute builder is defined");
return foundIt->second;
}
return std::nullopt;
}
std::optional<nb::callable> PyGlobals::lookupTypeCaster(MlirTypeID mlirTypeID,
MlirDialect dialect) {
// Try to load dialect module.
(void)loadDialectModule(unwrap(mlirDialectGetNamespace(dialect)));
nb::ft_lock_guard lock(mutex);
const auto foundIt = typeCasterMap.find(mlirTypeID);
if (foundIt != typeCasterMap.end()) {
assert(foundIt->second && "type caster is defined");
return foundIt->second;
}
return std::nullopt;
}
std::optional<nb::callable> PyGlobals::lookupValueCaster(MlirTypeID mlirTypeID,
MlirDialect dialect) {
// Try to load dialect module.
(void)loadDialectModule(unwrap(mlirDialectGetNamespace(dialect)));
nb::ft_lock_guard lock(mutex);
const auto foundIt = valueCasterMap.find(mlirTypeID);
if (foundIt != valueCasterMap.end()) {
assert(foundIt->second && "value caster is defined");
return foundIt->second;
}
return std::nullopt;
}
std::optional<nb::object>
PyGlobals::lookupDialectClass(const std::string &dialectNamespace) {
// Make sure dialect module is loaded.
if (!loadDialectModule(dialectNamespace))
return std::nullopt;
nb::ft_lock_guard lock(mutex);
const auto foundIt = dialectClassMap.find(dialectNamespace);
if (foundIt != dialectClassMap.end()) {
assert(foundIt->second && "dialect class is defined");
return foundIt->second;
}
// Not found and loading did not yield a registration.
return std::nullopt;
}
std::optional<nb::object>
PyGlobals::lookupOperationClass(llvm::StringRef operationName) {
// Make sure dialect module is loaded.
auto split = operationName.split('.');
llvm::StringRef dialectNamespace = split.first;
if (!loadDialectModule(dialectNamespace))
return std::nullopt;
nb::ft_lock_guard lock(mutex);
auto foundIt = operationClassMap.find(operationName);
if (foundIt != operationClassMap.end()) {
assert(foundIt->second && "OpView is defined");
return foundIt->second;
}
// Not found and loading did not yield a registration.
return std::nullopt;
}
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