[MLIR] Lowering of frontend dialect to KRNL dialect (#382)

* Partial support for lowering operations to KRNL dialect.

* Attempt to lower to KRNL IR.

* Update file.

* Add lowering.

* Address comments. Fix alloc dynamic dimensions. Correctly link StandardOps.

* Temporarily remove deallocation of locally allocated tensors.

CMakeLists.txt

@@ -46,3 +46,5 @@ add_subdirectory(src/builder)
 add_subdirectory(src/compiler)
 add_subdirectory(src)
 
+add_subdirectory(test)
+

MLIR.cmake

@@ -44,90 +44,96 @@ set(
   )
 include_directories(${MLIR_INCLUDE_PATHS})
 
-find_library(MLIR_LIB_ANALYSIS
-             NAMES MLIRAnalysis
-             PATHS ${LLVM_PROJECT_LIB}
-             NO_DEFAULT_PATH)
-
-find_library(MLIR_LIB_IR NAMES MLIRIR PATHS ${LLVM_PROJECT_LIB} NO_DEFAULT_PATH)
-
-find_library(MLIR_LIB_PARSER
-             NAMES MLIRParser
-             PATHS ${LLVM_PROJECT_LIB}
-             NO_DEFAULT_PATH)
-
-find_library(MLIR_LIB_PASS
-             NAMES MLIRPass
-             PATHS ${LLVM_PROJECT_LIB}
-             NO_DEFAULT_PATH)
-
-find_library(MLIR_LIB_TRANSFORMS
-             NAMES MLIRTransforms
-             PATHS ${LLVM_PROJECT_LIB}
-             NO_DEFAULT_PATH)
-
-find_library(MLIR_LIB_VECTOR_OPS
-             NAMES MLIRVectorOps
-             PATHS ${LLVM_PROJECT_LIB}
-             NO_DEFAULT_PATH)
-
-find_library(MLIR_LIB_SUPPORT
-             NAMES MLIRSupport
-             PATHS ${LLVM_PROJECT_LIB}
-             NO_DEFAULT_PATH)
-
-find_library(MLIR_LIB_STANDARD_OPS
-             NAMES MLIRStandardOps
-             PATHS ${LLVM_PROJECT_LIB}
-             NO_DEFAULT_PATH)
-
-find_library(MLIR_LIB_OPT_MAIN
-             NAMES MLIROptMain
-             PATHS ${LLVM_PROJECT_LIB}
-             NO_DEFAULT_PATH)
-
-find_library(MLIR_LLVM_IR
-             NAMES MLIRLLVMIR
-             PATHS ${LLVM_PROJECT_LIB}
-             NO_DEFAULT_PATH)
-
-find_library(MLIR_LIB_TRANSFORM_UTILS
-             NAMES MLIRTransformUtils
-             PATHS ${LLVM_PROJECT_LIB}
-             NO_DEFAULT_PATH)
-
-find_library(LLVM_LIB_SUPPORT
-             NAMES LLVMSupport
-             PATHS ${LLVM_PROJECT_LIB}
-             NO_DEFAULT_PATH)
-
 # Threading libraries required due to parallel pass execution.
 find_package(Threads REQUIRED)
 
-set(MLIRLIBS
-    ${MLIR_LIB_ANALYSIS}
-    ${MLIR_LIB_IR}
-    ${MLIR_LIB_PARSER}
-    ${MLIR_LIB_PASS}
-    ${MLIR_LIB_TRANSFORMS}
-    ${MLIR_LIB_VECTOR_OPS}
-    ${MLIR_LIB_STANDARD_OPS}
-    ${MLIR_LIB_OPT_MAIN}
-    ${MLIR_LIB_SUPPORT}
-    ${MLIR_LIB_TRANSFORM_UTILS}
-    ${MLIR_LIB_ANALYSIS}
-    ${MLIR_LIB_IR}
-    ${MLIR_LIB_PARSER}
-    ${MLIR_LIB_PASS}
-    ${MLIR_LIB_TRANSFORMS}
-    ${MLIR_LIB_VECTOR_OPS}
-    ${MLIR_LIB_STANDARD_OPS}
-    ${MLIR_LIB_OPT_MAIN}
-    ${MLIR_LIB_SUPPORT}
-    ${MLIR_LIB_TRANSFORM_UTILS}
-    ${LLVM_LIB_SUPPORT}
+function(find_mlir_lib lib)
+  find_library(${lib}
+               NAMES ${lib}
+               PATHS ${LLVM_PROJECT_LIB}
+               NO_DEFAULT_PATH)
+endfunction(find_mlir_lib)
+
+find_mlir_lib(MLIRAffineOps)
+find_mlir_lib(MLIRAffineToStandard)
+find_mlir_lib(MLIRAnalysis)
+find_mlir_lib(MLIRExecutionEngine)
+find_mlir_lib(MLIRIR)
+find_mlir_lib(MLIRLLVMIR)
+find_mlir_lib(MLIRLoopToStandard)
+find_mlir_lib(MLIRParser)
+find_mlir_lib(MLIRPass)
+find_mlir_lib(MLIRStandardOps)
+find_mlir_lib(MLIRStandardToLLVM)
+find_mlir_lib(MLIRTargetLLVMIR)
+find_mlir_lib(MLIRTransforms)
+find_mlir_lib(MLIRTransforms)
+find_mlir_lib(MLIRTransformUtils)
+find_mlir_lib(MLIRSupport)
+find_mlir_lib(MLIROptMain)
+
+find_mlir_lib(LLVMCore)
+find_mlir_lib(LLVMSupport)
+find_mlir_lib(LLVMAsmParser)
+find_mlir_lib(LLVMBinaryFormat)
+find_mlir_lib(LLVMRemarks)
+find_mlir_lib(LLVMIRReader)
+find_mlir_lib(LLVMTransformUtils)
+find_mlir_lib(LLVMBitstreamReader)
+
+set(MLIRLibsOnce
+        MLIRAffineOps
+        MLIRAffineToStandard
+        MLIRAnalysis
+        MLIRExecutionEngine
+        MLIRIR
+        MLIRLLVMIR
+        MLIRLoopToStandard
+        MLIRParser
+        MLIRPass
+        MLIRStandardOps
+        MLIRStandardToLLVM
+        MLIRTargetLLVMIR
+        MLIRTransforms
+        MLIRAffineOps
+        MLIRAffineToStandard
+        MLIRAnalysis
+        MLIRExecutionEngine
+        MLIRIR
+        MLIRLLVMIR
+        MLIRLoopToStandard
+        MLIRParser
+        MLIRPass
+        MLIRStandardOps
+        MLIRStandardToLLVM
+        MLIRTargetLLVMIR
+        MLIRTransforms
+        MLIRTransformUtils
+        MLIRLoopOps
+        MLIRSupport
+        MLIROptMain
+        LLVMCore
+        LLVMSupport
+        LLVMAsmParser
+        LLVMIRReader
+        LLVMTransformUtils
+        LLVMBinaryFormat
+        LLVMRemarks
+        LLVMBitstreamReader)
+
+set(MLIRLibs
+        ${MLIRLibsOnce}
+        ${MLIRLibsOnce}
         Threads::Threads)
 
+set(MLIRWholeArchiveLibs
+        MLIRAffineToStandard
+        MLIRAffineOps
+        MLIRLLVMIR
+        MLIRStandardOps
+        MLIRStandardToLLVM
+        MLIRLoopToStandard)
+
 function(whole_archive_link target lib_dir)
   get_property(link_flags TARGET ${target} PROPERTY LINK_FLAGS)
   if("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
@@ -155,6 +161,9 @@ function(whole_archive_link_mlir target)
 endfunction(whole_archive_link_mlir)
 
 function(whole_archive_link_onnf target)
+  foreach(LIB ${ARGN})
+    add_dependencies(${target} ${LIB})
+  endforeach(LIB)
   whole_archive_link(${target} ${CMAKE_BINARY_DIR}/lib ${ARGN})
 endfunction(whole_archive_link_onnf)
 

src/CMakeLists.txt

@@ -1,7 +1,9 @@
-
 add_executable(onnf main.cpp)
+
+target_link_libraries(onnf builder compiler ${MLIRLibs} ${Boost_LIBRARIES})
+whole_archive_link_mlir(onnf ${MLIRWholeArchiveLibs})
+
 target_include_directories(onnf PRIVATE ${CMAKE_SOURCE_DIR})
 target_include_directories(onnf PRIVATE ${CMAKE_BINARY_DIR})
-target_link_libraries(onnf builder compiler ${Boost_LIBRARIES})
 
 install(TARGETS onnf DESTINATION bin)

src/builder/CMakeLists.txt

@@ -5,7 +5,8 @@ add_library(builder
 
 target_include_directories(builder PRIVATE ${CMAKE_SOURCE_DIR})
 target_include_directories(builder PRIVATE ${CMAKE_BINARY_DIR})
-target_link_libraries(builder compiler onnx ${MLIRLIBS} curses)
+
+target_link_libraries(builder compiler onnx ${MLIRLibs} curses)
 target_include_directories(builder
                            PRIVATE
                            ${CMAKE_SOURCE_DIR}/third_party/onnx

src/compiler/CMakeLists.txt

@@ -10,9 +10,10 @@ add_library(
         dialect/krnl/parser_helper.hpp
         pass/shape_inference_pass.cpp
         pass/shape_inference_interface.hpp
-        pass/passes.hpp
         dialect/onnx/onnxop.inc
-        pass/onnx_combine.cpp)
+        pass/onnx_combine.cpp
+        pass/lower_frontend_to_krnl.cpp
+        pass/passes.hpp)
 
 # Include root src directory.
 target_include_directories(compiler PRIVATE ${ONNF_SRC_ROOT})
@@ -41,7 +42,7 @@ target_link_libraries(compiler
         ${Boost_LIBRARIES}
         ${CMAKE_THREAD_LIBS_INIT}
         ${CMAKE_DL_LIBS}
-        ${MLIRLIBS}
+        ${MLIRLibs}
         curses)
 
 add_subdirectory(tool)

src/compiler/dialect/krnl/krnl_ops.cpp

@@ -176,7 +176,7 @@ void KrnlIterateOp::build(Builder* builder, OperationState& result,
   result.addAttribute(KrnlIterateOp::getBoundTypesAttrName(),
       builder->getI32ArrayAttr(bound_types));
 
-  // Create a region and a block for the body. The arguments of the region is
+  // Create a region and a block for the body. The arguments of the region are
   // the loop induction variables; there can be multiple induction variables
   // associated with the same krnl.iterate operation.
   Region* bodyRegion = result.addRegion();
@@ -207,16 +207,16 @@ void print(OpAsmPrinter& p, KrnlIterateOp& op) {
   auto print_bound = [&](ArrayRef<Attribute> bound_types, size_t idx) {
     IntegerAttr type = bound_types[idx].dyn_cast<IntegerAttr>();
     if (type.getValue().getSExtValue() == 0) {
-      // Bound is an operand.
-      p.printOperand(*next_operand_bound);
-      next_operand_bound = std::next(next_operand_bound);
-    } else {
       // Bound is an integer attribute.
       auto bound_idx = idx / 2;
       auto is_ub = idx % 2;
       IntegerAttr bound = op.getAttrOfType<IntegerAttr>(
           KrnlIterateOp::getBoundAttrName(bound_idx, is_ub));
       p << bound.getValue().getSExtValue();
+    } else {
+      // Bound is an operand.
+      p.printOperand(*next_operand_bound);
+      next_operand_bound = std::next(next_operand_bound);
     }
   };
 

src/compiler/pass/lower_frontend_to_krnl.cpp

@@ -0,0 +1,282 @@
+//====- lower_frontend_to_krnl.cpp - Frontend dialects to Krnl lowering ---===//
+//
+// Copyright 2019 The DLC Authors.
+//
+// =============================================================================
+//
+// This file implements the lowering of frontend operations to a combination of
+// Krnl IR and standard operations.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/Sequence.h"
+#include "mlir/Dialect/AffineOps/AffineOps.h"
+#include "mlir/Dialect/StandardOps/Ops.h"
+#include "mlir/Pass/Pass.h"
+#include "mlir/Transforms/DialectConversion.h"
+
+#include "src/compiler/dialect/krnl/krnl_ops.hpp"
+#include "src/compiler/dialect/onnx/onnx_ops.hpp"
+
+#include "src/compiler/pass/passes.hpp"
+
+using namespace mlir;
+
+//===----------------------------------------------------------------------===//
+// FrontendToAffine RewritePatterns
+//===----------------------------------------------------------------------===//
+
+/// Check is all dimensions are known at compile time.
+static bool hasAllConstantDimensions(MemRefType type) {
+  auto memRefShape = type.getShape();
+  for (int i = 0; i < memRefShape.size(); ++i)
+    if (memRefShape[i] < 0)
+      return false;
+  return true;
+}
+
+/// Convert the given TensorType into the corresponding MemRefType.
+static MemRefType convertTensorToMemRef(TensorType type) {
+  assert(type.hasRank() && "expected only ranked shapes");
+  return MemRefType::get(type.getShape(), type.getElementType());
+}
+
+/// Insert an allocation and deallocation for the given MemRefType.
+static Value* insertAllocAndDealloc(
+    MemRefType type, Location loc, PatternRewriter& rewriter,
+    Value *oldMemRef = nullptr) {
+  // Put together alloc operands for any dynamic dimensions of the memref.
+  AllocOp alloc;
+  if (oldMemRef) {
+    SmallVector<Value *, 4> allocOperands;
+    auto memRefShape = type.getShape();
+    for (int i = 0; i < memRefShape.size(); ++i)
+      if (memRefShape[i] < 0)
+        allocOperands.push_back(rewriter.create<DimOp>(loc, oldMemRef, i));
+
+    alloc = rewriter.create<AllocOp>(loc, type, allocOperands);
+  } else {
+    alloc = rewriter.create<AllocOp>(loc, type);
+  }
+
+  // Make sure to allocate at the beginning of the block if
+  // all dimensions are known.
+  auto* parentBlock = alloc.getOperation()->getBlock();
+  if (hasAllConstantDimensions(type))
+    alloc.getOperation()->moveBefore(&parentBlock->front());
+
+  return alloc;
+}
+
+namespace {
+
+//===----------------------------------------------------------------------===//
+// AddOp lowering to Krnl dialect.
+//===----------------------------------------------------------------------===//
+struct ONNXAddOpLowering : public ConversionPattern {
+  ONNXAddOpLowering(MLIRContext* ctx)
+      : ConversionPattern(mlir::ONNXAddOp::getOperationName(), 1, ctx) {}
+
+  PatternMatchResult matchAndRewrite(Operation* op, ArrayRef<Value*> operands,
+      ConversionPatternRewriter& rewriter) const final {
+    // TODO: Check that the types are valid.
+    // Add is an operation that must have all operands and the result of
+    // the same type. This should have been verified by the verifier.
+    auto tensorType = (*op->result_type_begin()).cast<TensorType>();
+    auto loc = op->getLoc();
+
+    // Insert an allocation and deallocation for the result of this operation.
+    auto memRefType = convertTensorToMemRef(tensorType);
+
+    // If the output has a dynamic dimension, pass the operands required for
+    // each dynamic dimension to the AllocOp. The first operand of the Add
+    // operation is used. The operands of the Add need to match in terms of
+    // dimensions with the result at this pre-optimization phase.
+    // TODO: verify that dimensions match.
+    // TODO: can the dimension of the result differ after optimizations?
+    Value *alloc;
+    if (hasAllConstantDimensions(memRefType))
+      alloc = insertAllocAndDealloc(memRefType, loc, rewriter);
+    else
+      alloc = insertAllocAndDealloc(memRefType, loc, rewriter, operands[0]);
+
+    // Number of loops
+    auto memRefShape = memRefType.getShape();
+    int64_t rank = memRefShape.size();
+
+    // Define loops.
+    auto loopsOp = rewriter.create<KrnlDefineLoopsOp>(loc, rank);
+    std::vector<Value*> originalLoops;
+    originalLoops.reserve(rank);
+    for (auto result : loopsOp.getResults()) {
+      originalLoops.push_back(result);
+    }
+
+    // Define loop optimization.
+    auto optimizedLoopsOp = rewriter.create<KrnlOptimizeLoopsOp>(loc, rank);
+    std::vector<Value*> optimizedLoops;
+    optimizedLoops.reserve(rank);
+    for (auto result : optimizedLoopsOp.getResults()) {
+      optimizedLoops.push_back(result);
+    }
+    Block& optimizationBlock = optimizedLoopsOp.region().front();
+
+    // Iterate over the loop nest.
+    // TODO (Tian): move this logic inside KrnlIterateOp. Pass MemRefShape
+    // to KrnlIterateOp instead.
+    SmallVector<Value*, 8> operandBounds;
+    SmallVector<int64_t, 8> constBounds;
+    SmallVector<int, 16> boundTypes;
+    for (int i = 0; i < rank; ++i) {
+      if (memRefShape[i] < 0) {
+        // This is a dynamic value, hence use operands.
+        // Lower bound
+        constBounds.push_back(0);
+        boundTypes.push_back(0);
+        // Upper bound
+        operandBounds.push_back(
+            rewriter.create<DimOp>(loc, operands[0], i).getResult());
+        boundTypes.push_back(1);
+      } else {
+        // Lower bound
+        constBounds.push_back(0);
+        boundTypes.push_back(0);
+        // Upper bound
+        constBounds.push_back(memRefShape[i]);
+        boundTypes.push_back(0);
+      }
+    }
+    auto iterateOp = rewriter.create<KrnlIterateOp>(loc, originalLoops,
+        optimizedLoops, operandBounds, constBounds, boundTypes);
+    Block& iterationBlock = iterateOp.bodyRegion().front();
+
+    // Now perform the insertions into the body of the
+    // just generated instructions:
+
+    // 1. Insert any optimizations in the KrnlOptimizeLoopsOp body.
+    rewriter.setInsertionPointToEnd(&optimizationBlock);
+    // Return from KrnlOptimizeLoopsOp body.
+    // When no optimizations are present we just return the loops
+    // unchaged.
+    rewriter.create<KrnlReturnLoopsOp>(loc, originalLoops);
+    rewriter.setInsertionPoint(optimizedLoopsOp);
+
+    // 2. Insert instructions inside the KernelIterateOp body.
+    rewriter.setInsertionPointToStart(&iterationBlock);
+
+    // Handle AddOp:
+    SmallVector<Value*, 4> loopIVs;
+    for (auto arg : iterationBlock.getArguments())
+      loopIVs.push_back(arg);
+    auto loadedFirstVal =
+        rewriter.create<LoadOp>(loc, operands[0], loopIVs);
+    auto loadedSecondVal =
+        rewriter.create<LoadOp>(loc, operands[1], loopIVs);
+
+    // TODO: Choose type of the Add for now use the Float Add.
+    auto addOpResult = rewriter.create<AddFOp>(
+        loc, loadedFirstVal, loadedSecondVal);
+
+    // Store result in the resulting array.
+    rewriter.create<StoreOp>(loc, addOpResult, alloc, loopIVs);
+
+    rewriter.replaceOp(op, alloc);
+
+    return matchSuccess();
+  }
+};
+
+//===----------------------------------------------------------------------===//
+// Conversion from Tensor type to the Standard dialect MemRef type.
+//===----------------------------------------------------------------------===//
+
+struct TensorTypeConverter : public TypeConverter {
+  using TypeConverter::TypeConverter;
+
+  LogicalResult convertType(Type t, SmallVectorImpl<Type>& results) override {
+    if (auto tensor_type = t.dyn_cast<TensorType>()) {
+      results.push_back(convertTensorToMemRef(tensor_type));
+      return success();
+    }
+
+    results.push_back(t);
+    return success();
+  }
+
+  /// Return true if the inputs and outputs of the given function type are
+  /// legal. [Taken from MLIR and adapted to only check the legality of the
+  /// inputs. Once unranked results can be handled gracefully this
+  /// override needs to be removed in favour of the original MLIR one.]
+  bool isSignatureLegal(FunctionType funcType) {
+    return llvm::all_of(funcType.getInputs(),
+        [this](Type type) { return isLegal(type); });
+  }
+};
+
+}  // end anonymous namespace.
+
+//===----------------------------------------------------------------------===//
+// Frontend to Krnl Dialect lowering pass
+//===----------------------------------------------------------------------===//
+
+/// This is a partial lowering to Krnl loops of the ONNX operations.
+namespace {
+struct FrontendToKrnlLoweringPass
+    : public ModulePass<FrontendToKrnlLoweringPass> {
+  void runOnModule() final;
+};
+}  // end anonymous namespace.
+
+void FrontendToKrnlLoweringPass::runOnModule() {
+  auto module = getModule();
+
+  // The first thing to define is the conversion target. This will define the
+  // final target for this lowering.
+  ConversionTarget target(getContext());
+
+  // We define the specific operations, or dialects, that are legal targets for
+  // this lowering.
+  target
+      .addLegalDialect<KrnlOpsDialect, AffineOpsDialect, StandardOpsDialect>();
+
+  // TODO: enable this once more ops are supported.
+  // We also define the ONNX dialect as Illegal so that the conversion will fail
+  // if any of these operations are *not* converted.
+  // target.addIllegalDialect<mlir::ONNXOpsDialect>();
+
+  // TODO: add any other ops which are considered legal.
+  // Some operations can be marked as being still legal.
+  // Example: target.addLegalOp<mlir::OpName>();
+
+  // Now that the conversion target has been defined, we just need to provide
+  // the set of patterns that will lower the frontend operations.
+  OwningRewritePatternList patterns;
+
+  // Convert TensorType to MemRef
+  TensorTypeConverter tensor_to_memref_converter;
+  target.addDynamicallyLegalOp<FuncOp>([&](FuncOp op) {
+    // FuncOp is legal only if types have been converted to Std types.
+    return tensor_to_memref_converter.isSignatureLegal(op.getType());
+  });
+
+  // Type conversion for function signatures.
+  // Call MLIR FuncOp signature conversion when result type is
+  // a ranked tensor.
+  populateFuncOpTypeConversionPattern(
+      patterns, &getContext(), tensor_to_memref_converter);
+
+  // Frontent operation lowering.
+  patterns.insert<ONNXAddOpLowering>(&getContext());
+
+  // With the target and rewrite patterns defined, we can now attempt the
+  // conversion. The conversion will signal failure if any of our `illegal`
+  // operations were not converted successfully.
+  if (failed(applyPartialConversion(
+          module, target, patterns)))
+    signalPassFailure();
+}
+
+std::unique_ptr<Pass> mlir::createLowerToKrnlPass() {
+  return std::make_unique<FrontendToKrnlLoweringPass>();
+}

src/compiler/pass/passes.hpp

@@ -17,7 +17,8 @@ class Pass;
 
 std::unique_ptr<Pass> createShapeInferencePass();
 
-// TODO: Add pass for lowering to kernel IR.
+/// Add pass for lowering to Krnl IR.
+std::unique_ptr<mlir::Pass> createLowerToKrnlPass();
 
 // TODO: Add pass for lowering to LLVM IR.
 

src/compiler/pass/shape_inference_pass.cpp

@@ -71,6 +71,12 @@ class ShapeInferencePass : public mlir::FunctionPass<ShapeInferencePass> {
           << op_worklist.size() << " operations couldn't be inferred\n";
       signalPassFailure();
     }
+
+    if (auto terminator_op = f.getBody().back().getTerminator()) {
+      auto results = terminator_op->getOperandTypes();
+      f.setType(FunctionType::get(f.getType().getInputs(),
+                std::vector<Type>(results.begin(), results.end()), f.getContext()));
+    }
   }
 
   /*!

src/compiler/tool/onnf_opt/CMakeLists.txt

@@ -3,14 +3,8 @@ add_executable(onnf-opt onnf_opt.cpp)
 target_include_directories(onnf-opt PRIVATE ${ONNF_SRC_ROOT})
 target_include_directories(onnf-opt PRIVATE ${ONNF_BIN_ROOT})
 
-set(LIB_LIST
-    MLIRStandardOps
-    MLIRAffineOps
-    MLIRLoopOps
-    MLIRTransformUtils
-    MLIREDSC
-    MLIRTransforms)
-whole_archive_link_mlir(onnf-opt ${LIB_LIST})
+target_link_libraries(onnf-opt compiler ${MLIRLibs})
+whole_archive_link_mlir(onnf-opt ${MLIRWholeArchiveLibs})
 
 # TODO: need to investigate how to whole-archive link compiler pass to onnf-opt.
 target_link_libraries(onnf-opt compiler)

src/main.cpp

@@ -124,6 +124,7 @@ int main(int ac, char* av[]) {
   mlir::PassManager pm(&context);
   pm.addPass(mlir::createShapeInferencePass());
   pm.addPass(mlir::createCanonicalizerPass());
+  pm.addPass(mlir::createLowerToKrnlPass());
   pm.run(*module);
 
   return 0;

test/CMakeLists.txt

@@ -1,4 +1 @@
-add_subdirectory(models)
-add_subdirectory(nodes)
-
 add_subdirectory(mlir)