[python] Remove unused MLIR components

We don't need to take everything from MLIR for our python bindings. This
change cherry picks the upstream components our compiler depends on.

The commit also cleans up some unnecessary code that ends up registering
dialects more than once, and surfaces the `register_all_dialects`
function to a less obscure location.

Signed-off-by: boschmitt <[email protected]>

Author: boschmitt

python/cudaq/kernel/ast_bridge.py

@@ -123,8 +123,6 @@ def __init__(self, capturedDataStorage: CapturedDataStorage, **kwargs):
         else:
             self.ctx = Context()
             register_all_dialects(self.ctx)
-            quake.register_dialect(self.ctx)
-            cc.register_dialect(self.ctx)
             cudaq_runtime.registerLLVMDialectTranslation(self.ctx)
             self.loc = Location.unknown(context=self.ctx)
             self.module = Module.create(loc=self.loc)

python/cudaq/kernel/kernel_builder.py

@@ -37,7 +37,8 @@
 
 # We need static initializers to run in the CAPI `ExecutionEngine`,
 # so here we run a simple JIT compile at global scope
-with Context():
+with Context() as ctx:
+    register_all_dialects(ctx)
     module = Module.parse(r"""
 llvm.func @none() {
   llvm.return
@@ -246,8 +247,6 @@ class PyKernel(object):
     def __init__(self, argTypeList):
         self.ctx = Context()
         register_all_dialects(self.ctx)
-        quake.register_dialect(self.ctx)
-        cc.register_dialect(self.ctx)
         cudaq_runtime.registerLLVMDialectTranslation(self.ctx)
 
         self.metadata = {'conditionalOnMeasure': False}

python/cudaq/mlir/__init__.py

@@ -0,0 +1,9 @@
+# ============================================================================ #
+# Copyright (c) 2022 - 2024 NVIDIA Corporation & Affiliates.                   #
+# All rights reserved.                                                         #
+#                                                                              #
+# This source code and the accompanying materials are made available under     #
+# the terms of the Apache License 2.0 which accompanies this distribution.     #
+# ============================================================================ #
+
+from ._mlir_libs._quakeDialects import register_all_dialects

python/extension/CMakeLists.txt

@@ -119,10 +119,14 @@ add_mlir_python_common_capi_library(CUDAQuantumPythonCAPI
   RELATIVE_INSTALL_ROOT "../.."
   DECLARED_SOURCES
     CUDAQuantumPythonSources
-    # TODO: Remove this in favor of showing fine grained registration once
-    # available.
-    MLIRPythonExtension.RegisterEverything
     MLIRPythonSources.Core
+    MLIRPythonSources.Dialects.arith
+    MLIRPythonSources.Dialects.builtin
+    MLIRPythonSources.Dialects.cf
+    MLIRPythonSources.Dialects.complex
+    MLIRPythonSources.Dialects.func
+    MLIRPythonSources.Dialects.math
+    MLIRPythonSources.ExecutionEngine
 )
 
 ################################################################################
@@ -134,10 +138,14 @@ add_mlir_python_modules(CUDAQuantumPythonModules
   INSTALL_PREFIX "cudaq/mlir"
   DECLARED_SOURCES
     CUDAQuantumPythonSources
-    # TODO: Remove this in favor of showing fine grained registration once
-    # available.
-    MLIRPythonExtension.RegisterEverything
-    MLIRPythonSources
+    MLIRPythonSources.Core
+    MLIRPythonSources.Dialects.arith
+    MLIRPythonSources.Dialects.builtin
+    MLIRPythonSources.Dialects.cf
+    MLIRPythonSources.Dialects.complex
+    MLIRPythonSources.Dialects.func
+    MLIRPythonSources.Dialects.math
+    MLIRPythonSources.ExecutionEngine
   COMMON_CAPI_LINK_LIBS
     CUDAQuantumPythonCAPI
   )

python/runtime/mlir/py_register_dialects.cpp

@@ -6,19 +6,15 @@
  * the terms of the Apache License 2.0 which accompanies this distribution.    *
  ******************************************************************************/
 
+#include "py_register_dialects.h"
 #include "cudaq/Optimizer/Builder/Intrinsics.h"
-#include "cudaq/Optimizer/CAPI/Dialects.h"
 #include "cudaq/Optimizer/CodeGen/Passes.h"
-#include "cudaq/Optimizer/CodeGen/Pipelines.h"
-#include "cudaq/Optimizer/Dialect/CC/CCDialect.h"
-#include "cudaq/Optimizer/Dialect/CC/CCOps.h"
 #include "cudaq/Optimizer/Dialect/CC/CCTypes.h"
-#include "cudaq/Optimizer/Dialect/Quake/QuakeDialect.h"
 #include "cudaq/Optimizer/Dialect/Quake/QuakeTypes.h"
+#include "cudaq/Optimizer/InitAllDialects.h"
 #include "cudaq/Optimizer/InitAllPasses.h"
-#include "cudaq/Optimizer/Transforms/Passes.h"
 #include "mlir/Bindings/Python/PybindAdaptors.h"
-#include "mlir/InitAllDialects.h"
+#include "mlir/CAPI/IR.h"
 #include <fmt/core.h>
 #include <pybind11/complex.h>
 #include <pybind11/stl.h>
@@ -27,27 +23,9 @@ namespace py = pybind11;
 using namespace mlir::python::adaptors;
 using namespace mlir;
 
-namespace cudaq {
-static bool registered = false;
-
-void registerQuakeDialectAndTypes(py::module &m) {
+static void registerQuakeTypes(py::module &m) {
   auto quakeMod = m.def_submodule("quake");
 
-  quakeMod.def(
-      "register_dialect",
-      [](MlirContext context, bool load) {
-        MlirDialectHandle handle = mlirGetDialectHandle__quake__();
-        mlirDialectHandleRegisterDialect(handle, context);
-        if (load)
-          mlirDialectHandleLoadDialect(handle, context);
-
-        if (!registered) {
-          cudaq::registerCudaqPassesAndPipelines();
-          registered = true;
-        }
-      },
-      py::arg("context") = py::none(), py::arg("load") = true);
-
   mlir_type_subclass(quakeMod, "RefType", [](MlirType type) {
     return unwrap(type).isa<quake::RefType>();
   }).def_classmethod("get", [](py::object cls, MlirContext ctx) {
@@ -138,21 +116,10 @@ void registerQuakeDialectAndTypes(py::module &m) {
       });
 }
 
-void registerCCDialectAndTypes(py::module &m) {
+static void registerCCTypes(py::module &m) {
 
   auto ccMod = m.def_submodule("cc");
 
-  ccMod.def(
-      "register_dialect",
-      [](MlirContext context, bool load) {
-        MlirDialectHandle ccHandle = mlirGetDialectHandle__cc__();
-        mlirDialectHandleRegisterDialect(ccHandle, context);
-        if (load) {
-          mlirDialectHandleLoadDialect(ccHandle, context);
-        }
-      },
-      py::arg("context") = py::none(), py::arg("load") = true);
-
   mlir_type_subclass(ccMod, "CharspanType", [](MlirType type) {
     return unwrap(type).isa<cudaq::cc::CharspanType>();
   }).def_classmethod("get", [](py::object cls, MlirContext ctx) {
@@ -292,10 +259,9 @@ void registerCCDialectAndTypes(py::module &m) {
           });
 }
 
-void bindRegisterDialects(py::module &mod) {
-  registerQuakeDialectAndTypes(mod);
-  registerCCDialectAndTypes(mod);
+static bool registered = false;
 
+void cudaq::bindRegisterDialects(py::module &mod) {
   mod.def("load_intrinsic", [](MlirModule module, std::string name) {
     auto unwrapped = unwrap(module);
     cudaq::IRBuilder builder = IRBuilder::atBlockEnd(unwrapped.getBody());
@@ -305,14 +271,22 @@ void bindRegisterDialects(py::module &mod) {
 
   mod.def("register_all_dialects", [](MlirContext context) {
     DialectRegistry registry;
-    registry.insert<quake::QuakeDialect, cudaq::cc::CCDialect>();
+    cudaq::registerAllDialects(registry);
     cudaq::opt::registerCodeGenDialect(registry);
-    registerAllDialects(registry);
-    auto *mlirContext = unwrap(context);
+    MLIRContext *mlirContext = unwrap(context);
     mlirContext->appendDialectRegistry(registry);
     mlirContext->loadAllAvailableDialects();
   });
 
+  // Register type and passes once, when the module is loaded.
+  registerQuakeTypes(mod);
+  registerCCTypes(mod);
+
+  if (!registered) {
+    cudaq::registerAllPasses();
+    registered = true;
+  }
+
   mod.def("gen_vector_of_complex_constant", [](MlirLocation loc,
                                                MlirModule module,
                                                std::string name,
@@ -324,4 +298,3 @@ void bindRegisterDialects(py::module &mod) {
     builder.genVectorOfConstants(unwrap(loc), modOp, name, newValues);
   });
 }
-} // namespace cudaq

python/tests/mlir/bare.py

@@ -8,12 +8,13 @@
 
 # RUN: PYTHONPATH=../../ python3 %s | FileCheck %s
 
+from cudaq.mlir import register_all_dialects
 from cudaq.mlir.ir import *
 from cudaq.mlir.dialects import quake
 from cudaq.mlir.dialects import builtin, func, arith
 
 with Context() as ctx:
-    quake.register_dialect()
+    register_all_dialects(ctx)
     m = Module.create(loc=Location.unknown())
     with InsertionPoint(m.body), Location.unknown():
         f = func.FuncOp('main', ([], []))