constant fold linalg.map (generated from tensor.pad for padding)

refactor pim helpers in PimCommon

.gitignore

@@ -1,2 +1,4 @@
 .idea
+.claude
+AGENTS.md
 build

src/PIM/CMakeLists.txt

@@ -20,7 +20,7 @@ add_onnx_mlir_library(OMPIMAccel
   Pass/CountInstructionPass.cpp
   Pass/EmitPimJsonPass.cpp
   Pass/MessagePass.cpp
-  Pass/PimFoldHostConstantsPass.cpp
+  Pass/PimConstantFoldingPass.cpp
   Pass/PimHostVerificationPass.cpp
 
   EXCLUDE_FROM_OM_LIBS

src/PIM/Common/PimCommon.cpp

@@ -12,7 +12,15 @@ using namespace mlir;
 
 namespace onnx_mlir {
 
-std::string getOutputDir() { return outputBaseName.substr(0, outputBaseName.find_last_of('/')); }
+std::string getOutputDir() {
+  if (outputBaseName.empty() || outputBaseName == "-")
+    return {};
+
+  size_t lastSlash = outputBaseName.find_last_of('/');
+  if (lastSlash == std::string::npos)
+    return ".";
+  return outputBaseName.substr(0, lastSlash);
+}
 
 void createDirectory(const std::string& directory) {
   std::error_code errorCode;
@@ -21,7 +29,11 @@ void createDirectory(const std::string& directory) {
 }
 
 void dumpModule(ModuleOp moduleOp, const std::string& name) {
-  std::string dialectsDir = getOutputDir() + "/dialects";
+  std::string outputDir = getOutputDir();
+  if (outputDir.empty())
+    return;
+
+  std::string dialectsDir = outputDir + "/dialects";
   createDirectory(dialectsDir);
 
   std::fstream file(dialectsDir + "/" + name + ".mlir", std::ios::out);
@@ -143,4 +155,85 @@ FailureOr<Operation*> getOtherEndOfChannel(Operation* op, bool opIsReceive, Rewr
   }
 }
 
+SmallVector<int64_t> computeRowMajorStrides(ArrayRef<int64_t> shape) {
+  SmallVector<int64_t> strides(shape.size(), 1);
+  for (int64_t dim = static_cast<int64_t>(shape.size()) - 2; dim >= 0; --dim)
+    strides[dim] = strides[dim + 1] * shape[dim + 1];
+  return strides;
+}
+
+SmallVector<int64_t> delinearizeIndex(int64_t linearIndex, ArrayRef<int64_t> shape, ArrayRef<int64_t> strides) {
+  SmallVector<int64_t> indices(shape.size(), 0);
+  for (auto [dim, stride] : llvm::enumerate(strides)) {
+    indices[dim] = linearIndex / stride;
+    linearIndex %= stride;
+  }
+  return indices;
+}
+
+int64_t linearizeIndex(ArrayRef<int64_t> indices, ArrayRef<int64_t> strides) {
+  int64_t linearIndex = 0;
+  for (auto [index, stride] : llvm::zip_equal(indices, strides))
+    linearIndex += index * stride;
+  return linearIndex;
+}
+
+int64_t getNumElements(ArrayRef<int64_t> shape) {
+  int64_t numElements = 1;
+  for (int64_t dim : shape)
+    numElements *= dim;
+  return numElements;
+}
+
+bool isMemoryContiguous(ArrayRef<int64_t> srcShape,
+                        ArrayRef<int64_t> offsets,
+                        ArrayRef<int64_t> sizes,
+                        ArrayRef<int64_t> strides) {
+  if (std::any_of(strides.begin(), strides.end(), [](int64_t stride) -> bool { return stride != 1; }))
+    return false;
+
+  auto offsetsAndSizesAndShape = llvm::zip_equal(llvm::make_range(offsets.rbegin(), offsets.rend()),
+                                                 llvm::make_range(sizes.rbegin(), sizes.rend()),
+                                                 llvm::make_range(srcShape.rbegin(), srcShape.rend()));
+
+  auto firstNonZeroOffset = std::find_if(
+    offsetsAndSizesAndShape.begin(), offsetsAndSizesAndShape.end(), [&](auto offsetAndSizeAndShape) -> bool {
+      auto [offset, _size, _dimension] = offsetAndSizeAndShape;
+      return offset != 0;
+    });
+
+  if (firstNonZeroOffset != offsetsAndSizesAndShape.end()) {
+    auto [offset, size, dimension] = *firstNonZeroOffset;
+    if (size > dimension - offset)
+      return false;
+    ++firstNonZeroOffset;
+
+    if (std::any_of(firstNonZeroOffset, offsetsAndSizesAndShape.end(), [](auto offsetAndSizeAndShape) -> bool {
+          auto [_offset, size, _dimension] = offsetAndSizeAndShape;
+          return size != 1;
+        }))
+      return false;
+  }
+
+  auto sizesAndShape = llvm::zip_equal(llvm::make_range(sizes.rbegin(), sizes.rend()),
+                                       llvm::make_range(srcShape.rbegin(), srcShape.rend()));
+
+  auto firstDifferentSize = std::find_if(sizesAndShape.begin(), sizesAndShape.end(), [&](auto sizeAndShape) -> bool {
+    auto [size, dimension] = sizeAndShape;
+    return size != dimension;
+  });
+
+  if (firstDifferentSize != sizesAndShape.end()) {
+    ++firstDifferentSize;
+
+    if (std::any_of(firstDifferentSize, sizesAndShape.end(), [](auto sizeAndShape) -> bool {
+          auto [size, _dimension] = sizeAndShape;
+          return size != 1;
+        }))
+      return false;
+  }
+
+  return true;
+}
+
 } // namespace onnx_mlir

src/PIM/Common/PimCommon.hpp

@@ -6,6 +6,8 @@
 #include "mlir/IR/PatternMatch.h"
 #include "mlir/IR/Value.h"
 
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 
 #include "src/Compiler/CompilerOptions.hpp"
@@ -32,4 +34,18 @@ mlir::memref::GlobalOp lookupGlobalForGetGlobal(mlir::ModuleOp moduleOp, mlir::m
 llvm::FailureOr<mlir::Operation*>
 getOtherEndOfChannel(mlir::Operation* op, bool opIsReceive, mlir::RewriterBase& rewriter);
 
+llvm::SmallVector<int64_t> computeRowMajorStrides(llvm::ArrayRef<int64_t> shape);
+
+llvm::SmallVector<int64_t>
+delinearizeIndex(int64_t linearIndex, llvm::ArrayRef<int64_t> shape, llvm::ArrayRef<int64_t> strides);
+
+int64_t linearizeIndex(llvm::ArrayRef<int64_t> indices, llvm::ArrayRef<int64_t> strides);
+
+int64_t getNumElements(llvm::ArrayRef<int64_t> shape);
+
+bool isMemoryContiguous(llvm::ArrayRef<int64_t> srcShape,
+                        llvm::ArrayRef<int64_t> offsets,
+                        llvm::ArrayRef<int64_t> sizes,
+                        llvm::ArrayRef<int64_t> strides);
+
 } // namespace onnx_mlir

src/PIM/Compiler/PimCodeGen.cpp

@@ -15,7 +15,6 @@
 
 #include "Common/PimCommon.hpp"
 #include "Conversion/ONNXToSpatial/ONNXToSpatialCommon.hpp"
-#include "Conversion/SpatialToPim/SpatialToPimCommon.hpp"
 #include "src/Accelerators/PIM/Compiler/PimCodeGen.hpp"
 #include "src/Accelerators/PIM/Compiler/PimCompilerOptions.hpp"
 #include "src/Accelerators/PIM/Dialect/Pim/PimOps.hpp"
@@ -382,12 +381,9 @@ void PimCodeGen::codeGenTransposeOp(pim::PimTransposeOp transposeOp) const {
   size_t elementSize = srcType.getElementTypeBitWidth() / 8;
   size_t totalElements = srcType.getNumElements();
 
-  // Read permutation and compute its inverse
+  // Read permutation. Destination dim i corresponds to source dim perm[i].
   SmallVector<int64_t> perm =
     map_to_vector(transposeOp.getPerms().getAsRange<IntegerAttr>(), [](auto attr) -> int64_t { return attr.getInt(); });
-  SmallVector<int64_t> permInv(rank);
-  for (size_t i = 0; i < rank; i++)
-    permInv[perm[i]] = i;
 
   // Destination shape: dstShape[i] = srcShape[perm[i]]
   SmallVector<int64_t> dstShape(rank);
@@ -412,10 +408,10 @@ void PimCodeGen::codeGenTransposeOp(pim::PimTransposeOp transposeOp) const {
       remaining %= srcStrides[d];
     }
 
-    // Compute flat destination index: dstIdx[d] = srcIdx[permInv[d]]
+    // Compute flat destination index: dstIdx[d] = srcIdx[perm[d]]
     size_t dstFlat = 0;
     for (size_t d = 0; d < rank; d++)
-      dstFlat += srcIdx[permInv[d]] * dstStrides[d];
+      dstFlat += srcIdx[perm[d]] * dstStrides[d];
 
     emitMemCopyOp("lmv", dstAddr, dstFlat * elementSize, srcAddr, srcFlat * elementSize, elementSize, "len");
   }

src/PIM/Compiler/PimCompilerUtils.cpp

@@ -46,8 +46,8 @@ void addPassesPim(OwningOpRef<ModuleOp>& module,
   }
 
   if (pimEmissionTarget >= EmitPimCodegen) {
-    pm.addPass(createPimFoldHostConstantsPass());
+    pm.addPass(createPimConstantFoldingPass());
-    pm.addPass(createMessagePass("Pim host constants folded"));
+    pm.addPass(createMessagePass("Pim constants folded"));
     pm.addPass(createPimHostVerificationPass());
     pm.addPass(createMessagePass("Pim host verified"));
     pm.addPass(createEmitPimJsonPass());

src/PIM/Conversion/SpatialToPim/SpatialToPimCommon.cpp

@@ -54,7 +54,7 @@ size_t getSliceActualOffset(tensor::ExtractSliceOp& sliceOp, ShapedType& inputSh
   return returnValue;
 }
 
-Operation* getEarliestUserWithinBlock(Value value) {
+Operation* getEarliestUserWithinBlock(mlir::Value value) {
   auto users = value.getUsers();
 
   assert(!users.empty());
@@ -67,23 +67,24 @@ Operation* getEarliestUserWithinBlock(Value value) {
   return earliestUser;
 }
 
-SmallVector<Value> getOpOperandsSortedByUses(Operation* operation) {
+SmallVector<mlir::Value> getOpOperandsSortedByUses(Operation* operation) {
-  auto operandsAndUses = map_to_vector(operation->getOperands(), [](Value operand) -> std::pair<Value, size_t> {
+  auto operandsAndUses =
+    map_to_vector(operation->getOperands(), [](mlir::Value operand) -> std::pair<mlir::Value, size_t> {
     return {operand, std::distance(operand.use_begin(), operand.use_end())};
   });
   sort(operandsAndUses, [](auto a, auto b) { return a.second < b.second; });
   return map_to_vector(operandsAndUses, [](auto operandAndUse) { return operandAndUse.first; });
 }
 
-Value getBestOutputTensorFromOperandsOrAllocate(PatternRewriter& rewriter, Operation* operation) {
+mlir::Value getBestOutputTensorFromOperandsOrAllocate(PatternRewriter& rewriter, Operation* operation) {
   assert("Only support operations with a single result" && operation->getNumResults() == 1);
-  Value result = operation->getResult(0);
+  mlir::Value result = operation->getResult(0);
   auto resultType = result.getType();
   assert("Only support result ShapedType as result type" && isa<ShapedType>(resultType));
 
-  SmallVector<Value> operands = getOpOperandsSortedByUses(operation);
+  SmallVector<mlir::Value> operands = getOpOperandsSortedByUses(operation);
   auto validOperands =
-    make_filter_range(operands, [resultType](Value operand) { return operand.getType() == resultType; });
+    make_filter_range(operands, [resultType](mlir::Value operand) { return operand.getType() == resultType; });
   auto bestOperand = validOperands.begin();
 
   if (bestOperand != validOperands.end())

src/PIM/Conversion/SpatialToPim/SpatialToPimCommon.hpp

@@ -2,6 +2,7 @@
 
 #include "mlir/Dialect/Tensor/IR/Tensor.h"
 
+#include "src/Accelerators/PIM/Common/PimCommon.hpp"
 #include "src/Accelerators/PIM/Dialect/Spatial/SpatialOps.hpp"
 
 namespace onnx_mlir {
@@ -39,71 +40,13 @@ mlir::SmallVector<mlir::Value> getOpOperandsSortedByUses(mlir::Operation* operat
 
 mlir::Value getBestOutputTensorFromOperandsOrAllocate(mlir::PatternRewriter& rewriter, mlir::Operation* operation);
 
-static bool isMemoryContiguous(const mlir::ArrayRef<int64_t> srcShape,
-                               const mlir::ArrayRef<int64_t> offsets,
-                               const mlir::ArrayRef<int64_t> sizes,
-                               const mlir::ArrayRef<int64_t> strides) {
-  // Check that all strides are 1
-  if (std::any_of(strides.begin(), strides.end(), [](int64_t stride) -> bool { return stride != 1; }))
-    return false;
-
-  // Check offsets from right to left:
-  // The first offset_n at position n different from 0:
-  // - limits all sizes to the left to 1
-  // - limits size_n to dimension_n - offset_n
-  auto offsetsAndSizesAndShape = llvm::zip_equal(llvm::make_range(offsets.rbegin(), offsets.rend()),
-                                                 llvm::make_range(sizes.rbegin(), sizes.rend()),
-                                                 llvm::make_range(srcShape.rbegin(), srcShape.rend()));
-
-  auto firstNonZeroOffset = std::find_if(
-    offsetsAndSizesAndShape.begin(), offsetsAndSizesAndShape.end(), [&](auto offsetAndSizeAndShape) -> bool {
-      auto [offset, _size, _dimension] = offsetAndSizeAndShape;
-      return offset != 0;
-    });
-
-  if (firstNonZeroOffset != offsetsAndSizesAndShape.end()) {
-    auto [offset, size, dimension] = *firstNonZeroOffset;
-    if (size > dimension - offset)
-      return false;
-    ++firstNonZeroOffset;
-
-    if (std::any_of(firstNonZeroOffset, offsetsAndSizesAndShape.end(), [](auto offsetAndSizeAndShape) -> bool {
-          auto [_offset, size, _dimension] = offsetAndSizeAndShape;
-          return size != 1;
-        }))
-      return false;
-  }
-
-  // Check sizes from right to left:
-  // The first size_n at position n different from shape_n limits all sizes to the left to 1
-  auto sizesAndShape = llvm::zip_equal(llvm::make_range(sizes.rbegin(), sizes.rend()),
-                                       llvm::make_range(srcShape.rbegin(), srcShape.rend()));
-
-  auto firstDifferentSize = std::find_if(sizesAndShape.begin(), sizesAndShape.end(), [&](auto sizeAndShape) -> bool {
-    auto [size, dimension] = sizeAndShape;
-    return size != dimension;
-  });
-
-  if (firstDifferentSize != sizesAndShape.end()) {
-    ++firstDifferentSize;
-
-    if (std::any_of(firstDifferentSize, sizesAndShape.end(), [](auto sizeAndShape) -> bool {
-          auto [size, _] = sizeAndShape;
-          return size != 1;
-        }))
-      return false;
-  }
-
-  return true;
-}
-
 inline mlir::tensor::EmptyOp
 createEmptyTensorFromShaped(mlir::IRRewriter& rewriter, mlir::Location loc, mlir::ShapedType shapedType) {
   return mlir::tensor::EmptyOp::create(rewriter, loc, shapedType.getShape(), shapedType.getElementType());
 }
 
 inline bool isAConcatOp(mlir::Operation* op) {
-  return isa<mlir::tensor::ConcatOp>(op) || isa<spatial::SpatImgConcatOp>(op);
+  return llvm::isa<mlir::tensor::ConcatOp>(op) || llvm::isa<spatial::SpatImgConcatOp>(op);
 }
 
 } // namespace onnx_mlir

src/PIM/Conversion/SpatialToPim/SpatialToPimPass.cpp

@@ -129,7 +129,7 @@ void SpatialToPimPass::runOnOperation() {
   }
 
   // Dump to file for debug
-  dumpModule(moduleOp, "pim");
+  dumpModule(moduleOp, "pim0");
 }
 
 void SpatialToPimPass::runOnComputeOp(spatial::SpatWeightedCompute computeOp, IRRewriter& rewriter) {

src/PIM/Dialect/Pim/Transforms/Bufferization/PimBufferizationPass.cpp

@@ -89,7 +89,7 @@ void PimBufferizationPass::runOnOperation() {
   annotateWeightsMemrefs(moduleOp, funcOp);
 
   // Dump to file for debug
-  dumpModule(moduleOp, "pim_buf");
+  dumpModule(moduleOp, "pim1_buff");
 }
 
 void PimBufferizationPass::annotateWeightsMemrefs(ModuleOp moduleOp, func::FuncOp funcOp) const {

src/PIM/Pass/PimConstantFoldingPass.cpp

@@ -0,0 +1,618 @@
+#include "mlir/Dialect/Linalg/IR/Linalg.h"
+#include "mlir/Dialect/MemRef/IR/MemRef.h"
+#include "mlir/IR/BuiltinAttributes.h"
+#include "mlir/IR/BuiltinTypes.h"
+#include "mlir/IR/MLIRContext.h"
+#include "mlir/IR/Matchers.h"
+#include "mlir/IR/PatternMatch.h"
+#include "mlir/Pass/Pass.h"
+#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
+
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallBitVector.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallVector.h"
+
+#include <memory>
+
+#include "src/Accelerators/PIM/Common/PimCommon.hpp"
+#include "src/Accelerators/PIM/Dialect/Pim/PimOps.hpp"
+
+using namespace mlir;
+
+namespace onnx_mlir {
+
+namespace {
+
+static Value stripMemRefCasts(Value value) {
+  while (auto castOp = value.getDefiningOp<memref::CastOp>())
+    value = castOp.getSource();
+  return value;
+}
+
+static memref::GlobalOp createFoldedGlobal(ModuleOp moduleOp,
+                                           Location loc,
+                                           MemRefType globalType,
+                                           DenseElementsAttr denseAttr,
+                                           StringRef nameStem,
+                                           IntegerAttr alignment = {}) {
+  auto globalName = nameStem.str();
+  unsigned suffix = 0;
+  while (moduleOp.lookupSymbol(globalName))
+    globalName = (nameStem + "_" + std::to_string(++suffix)).str();
+
+  auto visibility = StringAttr::get(moduleOp.getContext(), "private");
+  OpBuilder moduleBuilder(moduleOp.getBodyRegion());
+  moduleBuilder.setInsertionPointToStart(moduleOp.getBody());
+  return memref::GlobalOp::create(moduleBuilder,
+                                  loc,
+                                  globalName,
+                                  visibility,
+                                  globalType,
+                                  denseAttr,
+                                  /*constant=*/true,
+                                  alignment);
+}
+
+static FailureOr<DenseElementsAttr> getDenseGlobalValue(ModuleOp moduleOp, Value value) {
+  value = stripMemRefCasts(value);
+
+  auto getGlobalOp = value.getDefiningOp<memref::GetGlobalOp>();
+  if (!getGlobalOp)
+    return failure();
+
+  auto globalOp = lookupGlobalForGetGlobal(moduleOp, getGlobalOp);
+  if (!globalOp || !globalOp.getConstant() || !globalOp.getInitialValue())
+    return failure();
+
+  auto denseAttr = dyn_cast<DenseElementsAttr>(*globalOp.getInitialValue());
+  if (!denseAttr)
+    return failure();
+  return denseAttr;
+}
+
+static FailureOr<DenseElementsAttr> transposeDenseElements(DenseElementsAttr denseAttr, ArrayRef<int64_t> perms) {
+  auto tensorType = dyn_cast<RankedTensorType>(denseAttr.getType());
+  if (!tensorType)
+    return failure();
+
+  int64_t rank = tensorType.getRank();
+  if (static_cast<int64_t>(perms.size()) != rank)
+    return failure();
+
+  llvm::SmallBitVector seen(rank);
+  SmallVector<int64_t> transposedShape;
+  transposedShape.reserve(rank);
+  for (int64_t perm : perms) {
+    if (perm < 0 || perm >= rank || seen.test(perm))
+      return failure();
+    seen.set(perm);
+    transposedShape.push_back(tensorType.getShape()[perm]);
+  }
+
+  auto transposedType = RankedTensorType::get(transposedShape, tensorType.getElementType());
+  if (denseAttr.isSplat())
+    return DenseElementsAttr::get(transposedType, denseAttr.getSplatValue<Attribute>());
+
+  SmallVector<Attribute> originalValues(denseAttr.getValues<Attribute>());
+  SmallVector<Attribute> transposedValues(originalValues.size());
+
+  SmallVector<int64_t> originalStrides(rank, 1);
+  SmallVector<int64_t> transposedStrides(rank, 1);
+  for (int64_t dim = rank - 2; dim >= 0; --dim) {
+    originalStrides[dim] = originalStrides[dim + 1] * tensorType.getShape()[dim + 1];
+    transposedStrides[dim] = transposedStrides[dim + 1] * transposedShape[dim + 1];
+  }
+
+  SmallVector<int64_t> originalIndices(rank);
+  SmallVector<int64_t> transposedIndices(rank);
+  for (auto [linearIndex, value] : llvm::enumerate(originalValues)) {
+    int64_t remaining = static_cast<int64_t>(linearIndex);
+    for (int64_t dim = 0; dim < rank; ++dim) {
+      originalIndices[dim] = remaining / originalStrides[dim];
+      remaining %= originalStrides[dim];
+    }
+
+    for (int64_t dim = 0; dim < rank; ++dim)
+      transposedIndices[dim] = originalIndices[perms[dim]];
+
+    int64_t transposedLinearIndex = 0;
+    for (int64_t dim = 0; dim < rank; ++dim)
+      transposedLinearIndex += transposedIndices[dim] * transposedStrides[dim];
+
+    transposedValues[transposedLinearIndex] = value;
+  }
+
+  return DenseElementsAttr::get(transposedType, transposedValues);
+}
+
+struct ConstantSubviewCopy {
+  DenseElementsAttr source;
+  SmallVector<int64_t> offsets;
+  SmallVector<int64_t> strides;
+  Operation* copyOp = nullptr;
+};
+
+static FailureOr<Attribute> getConstantMapYield(linalg::MapOp mapOp) {
+  if (!mapOp.getInputs().empty())
+    return failure();
+
+  auto yieldOp = dyn_cast<linalg::YieldOp>(mapOp.getMapper().front().getTerminator());
+  if (!yieldOp || yieldOp.getNumOperands() != 1)
+    return failure();
+
+  Attribute attr;
+  if (!matchPattern(yieldOp.getValues().front(), m_Constant(&attr)))
+    return failure();
+  return attr;
+}
+
+struct FoldConstantCoreMapPattern final : OpRewritePattern<linalg::MapOp> {
+  using OpRewritePattern::OpRewritePattern;
+
+  LogicalResult matchAndRewrite(linalg::MapOp mapOp, PatternRewriter& rewriter) const override {
+    auto coreOp = mapOp->getParentOfType<pim::PimCoreOp>();
+    if (!coreOp)
+      return failure();
+
+    auto initType = dyn_cast<MemRefType>(mapOp.getInit().getType());
+    if (!initType || !initType.hasStaticShape())
+      return failure();
+
+    auto fillValue = getConstantMapYield(mapOp);
+    if (failed(fillValue))
+      return failure();
+
+    auto tensorType = RankedTensorType::get(initType.getShape(), initType.getElementType());
+    DenseElementsAttr splatAttr = DenseElementsAttr::get(tensorType, *fillValue);
+
+    auto moduleOp = mapOp->getParentOfType<ModuleOp>();
+    if (!moduleOp)
+      return failure();
+
+    auto globalOp = createFoldedGlobal(moduleOp, mapOp.getLoc(), initType, splatAttr, "pim_core_fill");
+
+    OpBuilder::InsertionGuard guard(rewriter);
+    rewriter.setInsertionPoint(coreOp);
+    auto getGlobalOp = memref::GetGlobalOp::create(rewriter, mapOp.getLoc(), initType, globalOp.getName());
+
+    size_t elementByteWidth = initType.getElementTypeBitWidth() / 8;
+    if (elementByteWidth == 0)
+      return failure();
+    size_t totalBytes = initType.getNumElements() * elementByteWidth;
+
+    rewriter.setInsertionPoint(mapOp);
+    pim::PimMemCopyHostToDevOp::create(rewriter,
+                                       mapOp.getLoc(),
+                                       initType,
+                                       mapOp.getInit(),
+                                       getGlobalOp.getResult(),
+                                       rewriter.getI32IntegerAttr(0),
+                                       rewriter.getI32IntegerAttr(0),
+                                       rewriter.getI32IntegerAttr(static_cast<int32_t>(totalBytes)));
+    rewriter.eraseOp(mapOp);
+    return success();
+  }
+};
+
+struct StaticSubviewInfo {
+  Value source;
+  SmallVector<int64_t> sourceShape;
+  SmallVector<int64_t> offsets;
+  SmallVector<int64_t> sizes;
+  SmallVector<int64_t> strides;
+};
+
+static FailureOr<StaticSubviewInfo> getStaticSubviewInfo(Value value) {
+  auto subviewOp = value.getDefiningOp<memref::SubViewOp>();
+  if (!subviewOp)
+    return failure();
+
+  auto source = stripMemRefCasts(subviewOp.getSource());
+  auto sourceType = dyn_cast<MemRefType>(source.getType());
+  auto subviewType = dyn_cast<MemRefType>(subviewOp.getType());
+  if (!sourceType || !subviewType || !sourceType.hasStaticShape() || !subviewType.hasStaticShape())
+    return failure();
+
+  StaticSubviewInfo info;
+  info.source = source;
+  info.sourceShape.assign(sourceType.getShape().begin(), sourceType.getShape().end());
+  for (OpFoldResult offset : subviewOp.getMixedOffsets()) {
+    auto staticOffset = getConstantIntValue(offset);
+    if (!staticOffset)
+      return failure();
+    info.offsets.push_back(*staticOffset);
+  }
+  for (OpFoldResult size : subviewOp.getMixedSizes()) {
+    auto staticSize = getConstantIntValue(size);
+    if (!staticSize)
+      return failure();
+    info.sizes.push_back(*staticSize);
+  }
+  for (OpFoldResult stride : subviewOp.getMixedStrides()) {
+    auto staticStride = getConstantIntValue(stride);
+    if (!staticStride)
+      return failure();
+    info.strides.push_back(*staticStride);
+  }
+  return info;
+}
+
+static int64_t
+getSubviewChunkOffsetBytes(const StaticSubviewInfo& info, ArrayRef<int64_t> outerIndices, int64_t elementByteWidth) {
+  SmallVector<int64_t> sourceIndices;
+  sourceIndices.reserve(info.sourceShape.size());
+  for (size_t dim = 0; dim + 1 < info.sourceShape.size(); ++dim)
+    sourceIndices.push_back(info.offsets[dim] + outerIndices[dim] * info.strides[dim]);
+  sourceIndices.push_back(info.offsets.back());
+  return linearizeIndex(sourceIndices, computeRowMajorStrides(info.sourceShape)) * elementByteWidth;
+}
+
+struct RewriteCoreSubviewCopyPattern final : OpRewritePattern<pim::PimMemCopyOp> {
+  using OpRewritePattern::OpRewritePattern;
+
+  LogicalResult matchAndRewrite(pim::PimMemCopyOp copyOp, PatternRewriter& rewriter) const override {
+    if (!copyOp->getParentOfType<pim::PimCoreOp>())
+      return failure();
+
+    auto srcSubview = getStaticSubviewInfo(copyOp.getSrc());
+    auto dstSubview = getStaticSubviewInfo(copyOp.getDst());
+    const bool splitSrc = succeeded(srcSubview)
+                       && !isMemoryContiguous(srcSubview->sourceShape, srcSubview->offsets, srcSubview->sizes, srcSubview->strides);
+    const bool splitDst = succeeded(dstSubview)
+                       && !isMemoryContiguous(dstSubview->sourceShape, dstSubview->offsets, dstSubview->sizes, dstSubview->strides);
+    if (!splitSrc && !splitDst)
+      return failure();
+
+    auto sourceType = dyn_cast<MemRefType>(copyOp.getSrc().getType());
+    auto dstType = dyn_cast<MemRefType>(copyOp.getDst().getType());
+    if (!sourceType || !dstType || !sourceType.hasStaticShape() || !dstType.hasStaticShape())
+      return failure();
+    if (sourceType.getElementType() != dstType.getElementType())
+      return failure();
+
+    if (splitSrc && llvm::any_of(srcSubview->strides, [](int64_t stride) { return stride != 1; }))
+      return failure();
+    if (splitDst && llvm::any_of(dstSubview->strides, [](int64_t stride) { return stride != 1; }))
+      return failure();
+
+    ArrayRef<int64_t> copyShape = splitSrc ? ArrayRef<int64_t>(srcSubview->sizes) : ArrayRef<int64_t>(dstSubview->sizes);
+    if (splitSrc && splitDst && copyShape != ArrayRef<int64_t>(dstSubview->sizes))
+      return failure();
+
+    const int64_t elementByteWidth = sourceType.getElementTypeBitWidth() / 8;
+    if (elementByteWidth <= 0)
+      return failure();
+
+    const int64_t totalBytes = getNumElements(copyShape) * elementByteWidth;
+    if (copyOp.getSize() != totalBytes)
+      return failure();
+
+    const int64_t sliceBytes = copyShape.back() * elementByteWidth;
+    if (sliceBytes <= 0)
+      return failure();
+
+    SmallVector<int64_t> outerShape(copyShape.begin(), copyShape.end() - 1);
+    auto outerStrides = computeRowMajorStrides(outerShape);
+    const int64_t numSlices = outerShape.empty() ? 1 : getNumElements(outerShape);
+
+    rewriter.setInsertionPoint(copyOp);
+    for (int64_t linearIndex = 0; linearIndex < numSlices; ++linearIndex) {
+      SmallVector<int64_t> outerIndices =
+        outerShape.empty() ? SmallVector<int64_t>{} : delinearizeIndex(linearIndex, outerShape, outerStrides);
+      const int64_t srcByteOffset = copyOp.getSrcOffset()
+                                 + (splitSrc ? getSubviewChunkOffsetBytes(*srcSubview, outerIndices, elementByteWidth)
+                                             : linearIndex * sliceBytes);
+      const int64_t dstByteOffset = copyOp.getDstOffset()
+                                 + (splitDst ? getSubviewChunkOffsetBytes(*dstSubview, outerIndices, elementByteWidth)
+                                             : linearIndex * sliceBytes);
+      pim::PimMemCopyOp::create(rewriter,
+                                copyOp.getLoc(),
+                                splitDst ? cast<MemRefType>(dstSubview->source.getType()) : dstType,
+                                splitDst ? dstSubview->source : copyOp.getDst(),
+                                splitSrc ? srcSubview->source : copyOp.getSrc(),
+                                rewriter.getI32IntegerAttr(static_cast<int32_t>(dstByteOffset)),
+                                rewriter.getI32IntegerAttr(static_cast<int32_t>(srcByteOffset)),
+                                rewriter.getI32IntegerAttr(static_cast<int32_t>(sliceBytes)));
+    }
+
+    rewriter.replaceOp(copyOp, copyOp.getDst());
+    return success();
+  }
+};
+
+static FailureOr<DenseElementsAttr> foldConstantAlloc(memref::AllocOp allocOp, ModuleOp moduleOp) {
+  auto allocType = dyn_cast<MemRefType>(allocOp.getType());
+  if (!allocType || !allocType.hasStaticShape())
+    return failure();
+
+  auto resultTensorType = RankedTensorType::get(allocType.getShape(), allocType.getElementType());
+  const int64_t numElements = resultTensorType.getNumElements();
+  if (numElements < 0)
+    return failure();
+
+  Attribute fillValue;
+  SmallVector<ConstantSubviewCopy> copies;
+  llvm::SmallPtrSet<Operation*, 8> visitedAliases;
+  SmallVector<Value> pendingAliases;
+  pendingAliases.push_back(allocOp.getResult());
+
+  while (!pendingAliases.empty()) {
+    Value alias = pendingAliases.pop_back_val();
+    for (Operation* user : alias.getUsers()) {
+      if (!visitedAliases.insert(user).second)
+        continue;
+
+      if (auto mapOp = dyn_cast<linalg::MapOp>(user)) {
+        if (mapOp.getInit() != alias)
+          return failure();
+        auto maybeFillValue = getConstantMapYield(mapOp);
+        if (failed(maybeFillValue))
+          return failure();
+        if (fillValue && fillValue != *maybeFillValue)
+          return failure();
+        fillValue = *maybeFillValue;
+        continue;
+      }
+
+      if (auto subviewOp = dyn_cast<memref::SubViewOp>(user)) {
+        SmallVector<int64_t> offsets;
+        SmallVector<int64_t> strides;
+        offsets.reserve(subviewOp.getMixedOffsets().size());
+        strides.reserve(subviewOp.getMixedStrides().size());
+        for (OpFoldResult offset : subviewOp.getMixedOffsets()) {
+          auto staticOffset = getConstantIntValue(offset);
+          if (!staticOffset)
+            return failure();
+          offsets.push_back(*staticOffset);
+        }
+        for (OpFoldResult stride : subviewOp.getMixedStrides()) {
+          auto staticStride = getConstantIntValue(stride);
+          if (!staticStride)
+            return failure();
+          strides.push_back(*staticStride);
+        }
+
+        for (Operation* subviewUser : subviewOp->getUsers()) {
+          if (auto copyOp = dyn_cast<memref::CopyOp>(subviewUser)) {
+            if (copyOp.getTarget() != subviewOp.getResult())
+              return failure();
+
+            auto denseAttr = getDenseGlobalValue(moduleOp, copyOp.getSource());
+            if (failed(denseAttr))
+              return failure();
+            copies.push_back({*denseAttr, offsets, strides, copyOp});
+            continue;
+          }
+          return failure();
+        }
+        continue;
+      }
+
+      if (isa<pim::PimCoreOp, memref::DeallocOp>(user))
+        continue;
+
+      if (auto castOp = dyn_cast<memref::CastOp>(user)) {
+        pendingAliases.push_back(castOp.getResult());
+        continue;
+      }
+
+      return failure();
+    }
+  }
+
+  if (!fillValue)
+    return failure();
+
+  SmallVector<Attribute> resultValues(numElements, fillValue);
+  auto resultStrides = computeRowMajorStrides(resultTensorType.getShape());
+
+  llvm::sort(copies, [](const ConstantSubviewCopy& lhs, const ConstantSubviewCopy& rhs) {
+    return lhs.copyOp->isBeforeInBlock(rhs.copyOp);
+  });
+
+  for (const ConstantSubviewCopy& copy : copies) {
+    auto sourceType = dyn_cast<RankedTensorType>(copy.source.getType());
+    if (!sourceType || !sourceType.hasStaticShape())
+      return failure();
+    if (sourceType.getRank() != static_cast<int64_t>(copy.offsets.size())
+        || sourceType.getRank() != static_cast<int64_t>(copy.strides.size()))
+      return failure();
+
+    auto sourceStrides = computeRowMajorStrides(sourceType.getShape());
+    SmallVector<Attribute> sourceValues(copy.source.getValues<Attribute>());
+    for (auto [linearIndex, value] : llvm::enumerate(sourceValues)) {
+      SmallVector<int64_t> sourceIndices =
+        delinearizeIndex(static_cast<int64_t>(linearIndex), sourceType.getShape(), sourceStrides);
+      SmallVector<int64_t> resultIndices;
+      resultIndices.reserve(sourceIndices.size());
+      for (auto [offset, sourceIndex, stride] : llvm::zip_equal(copy.offsets, sourceIndices, copy.strides))
+        resultIndices.push_back(offset + sourceIndex * stride);
+
+      int64_t resultLinearIndex = linearizeIndex(resultIndices, resultStrides);
+      resultValues[resultLinearIndex] = value;
+    }
+  }
+
+  return DenseElementsAttr::get(resultTensorType, resultValues);
+}
+
+struct FoldConstantTransposePattern final : OpRewritePattern<pim::PimTransposeOp> {
+  using OpRewritePattern::OpRewritePattern;
+
+  LogicalResult matchAndRewrite(pim::PimTransposeOp transposeOp, PatternRewriter& rewriter) const override {
+    auto resultType = dyn_cast<MemRefType>(transposeOp.getOutRes().getType());
+    if (!resultType || !resultType.hasStaticShape())
+      return failure();
+
+    auto sourceGetGlobal = transposeOp.getData().getDefiningOp<memref::GetGlobalOp>();
+    if (!sourceGetGlobal)
+      return failure();
+
+    auto moduleOp = transposeOp->getParentOfType<ModuleOp>();
+    if (!moduleOp)
+      return failure();
+
+    auto sourceGlobal = lookupGlobalForGetGlobal(moduleOp, sourceGetGlobal);
+    if (!sourceGlobal || !sourceGlobal.getConstant() || !sourceGlobal.getInitialValue())
+      return failure();
+
+    auto denseAttr = dyn_cast<DenseElementsAttr>(*sourceGlobal.getInitialValue());
+    if (!denseAttr)
+      return failure();
+
+    SmallVector<int64_t> perms;
+    perms.reserve(transposeOp.getPerms().size());
+    for (IntegerAttr attr : transposeOp.getPerms().getAsRange<IntegerAttr>())
+      perms.push_back(attr.getInt());
+    FailureOr<DenseElementsAttr> transposedAttr = transposeDenseElements(denseAttr, perms);
+    if (failed(transposedAttr))
+      return failure();
+
+    auto transposedShape = cast<RankedTensorType>(transposedAttr->getType()).getShape();
+    if (!llvm::equal(transposedShape, resultType.getShape()))
+      return failure();
+
+    MemRefType globalType = resultType;
+
+    auto newGlobal = createFoldedGlobal(moduleOp,
+                                        transposeOp.getLoc(),
+                                        globalType,
+                                        *transposedAttr,
+                                        sourceGlobal.getName().str() + "__folded_transpose",
+                                        sourceGlobal.getAlignmentAttr());
+
+    rewriter.setInsertionPoint(transposeOp);
+    auto newGetGlobal = memref::GetGlobalOp::create(rewriter, transposeOp.getLoc(), globalType, newGlobal.getName());
+
+    bool isAlwaysWeight =
+      !transposeOp->getUsers().empty()
+      && llvm::all_of(transposeOp->getUsers(), [](Operation* user) { return isa<pim::PimCoreOp>(user); });
+    if (isAlwaysWeight) {
+      markWeightAlways(newGlobal);
+      markWeightAlways(newGetGlobal);
+    }
+
+    rewriter.replaceOp(transposeOp, newGetGlobal.getResult());
+    return success();
+  }
+};
+
+struct FoldConstantAllocPattern final : OpRewritePattern<memref::AllocOp> {
+  using OpRewritePattern::OpRewritePattern;
+
+  LogicalResult matchAndRewrite(memref::AllocOp allocOp, PatternRewriter& rewriter) const override {
+    auto moduleOp = allocOp->getParentOfType<ModuleOp>();
+    if (!moduleOp)
+      return failure();
+
+    auto foldedAttr = foldConstantAlloc(allocOp, moduleOp);
+    if (failed(foldedAttr))
+      return failure();
+
+    auto allocType = cast<MemRefType>(allocOp.getType());
+    auto newGlobal = createFoldedGlobal(moduleOp, allocOp.getLoc(), allocType, *foldedAttr, "pim_folded_constant");
+
+    rewriter.setInsertionPoint(allocOp);
+    auto newGetGlobal = memref::GetGlobalOp::create(rewriter, allocOp.getLoc(), allocType, newGlobal.getName());
+
+    SmallVector<Operation*> opsToErase;
+    SmallVector<memref::CastOp> castsToReplace;
+    bool allLiveUsersAreCoreOps = true;
+    for (Operation* user : llvm::make_early_inc_range(allocOp->getUsers())) {
+      if (isa<linalg::MapOp, memref::SubViewOp, memref::DeallocOp>(user)) {
+        opsToErase.push_back(user);
+        continue;
+      }
+
+      if (auto castOp = dyn_cast<memref::CastOp>(user)) {
+        castsToReplace.push_back(castOp);
+        continue;
+      }
+
+      if (!isa<pim::PimCoreOp>(user))
+        return failure();
+    }
+
+    if (!llvm::all_of(castsToReplace, [](memref::CastOp castOp) {
+          return llvm::all_of(castOp->getUsers(), [](Operation* user) { return isa<pim::PimCoreOp>(user); });
+        })) {
+      allLiveUsersAreCoreOps = false;
+    }
+
+    if (!llvm::all_of(allocOp->getUsers(), [](Operation* user) {
+          return isa<linalg::MapOp, memref::SubViewOp, memref::DeallocOp, memref::CastOp, pim::PimCoreOp>(user);
+        })) {
+      return failure();
+    }
+
+    if (allLiveUsersAreCoreOps) {
+      markWeightAlways(newGlobal);
+      markWeightAlways(newGetGlobal);
+    }
+
+    llvm::SmallPtrSet<Operation*, 8> preservedUsers(opsToErase.begin(), opsToErase.end());
+    for (memref::CastOp castOp : castsToReplace)
+      preservedUsers.insert(castOp);
+    rewriter.replaceAllUsesExcept(allocOp.getResult(), newGetGlobal.getResult(), preservedUsers);
+
+    for (memref::CastOp castOp : castsToReplace) {
+      rewriter.setInsertionPoint(castOp);
+      Value replacementCast = memref::CastOp::create(rewriter, castOp.getLoc(), castOp.getType(), newGetGlobal);
+      rewriter.replaceOp(castOp, replacementCast);
+      if (allLiveUsersAreCoreOps)
+        markWeightAlways(replacementCast.getDefiningOp());
+    }
+
+    for (Operation* op : llvm::make_early_inc_range(opsToErase)) {
+      if (auto subviewOp = dyn_cast<memref::SubViewOp>(op))
+        for (Operation* subviewUser : llvm::make_early_inc_range(subviewOp->getUsers()))
+          rewriter.eraseOp(subviewUser);
+      if (op->use_empty())
+        rewriter.eraseOp(op);
+    }
+
+    if (allocOp.use_empty())
+      rewriter.eraseOp(allocOp);
+    return success();
+  }
+};
+
+struct PimConstantFoldingPass : PassWrapper<PimConstantFoldingPass, OperationPass<ModuleOp>> {
+  MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(PimConstantFoldingPass)
+
+  StringRef getArgument() const override { return "pim-constant-folding-pass"; }
+  StringRef getDescription() const override { return "Fold host-side constant expressions before PIM verification"; }
+
+  LogicalResult initialize(MLIRContext* context) override {
+    RewritePatternSet owningPatterns(context);
+    for (auto* dialect : context->getLoadedDialects())
+      dialect->getCanonicalizationPatterns(owningPatterns);
+    for (RegisteredOperationName op : context->getRegisteredOperations())
+      op.getCanonicalizationPatterns(owningPatterns, context);
+    owningPatterns
+      .add<FoldConstantTransposePattern, FoldConstantAllocPattern, FoldConstantCoreMapPattern, RewriteCoreSubviewCopyPattern>(
+        context);
+    patterns = std::make_shared<FrozenRewritePatternSet>(std::move(owningPatterns));
+    return success();
+  }
+
+  void runOnOperation() override {
+    GreedyRewriteConfig config;
+    config.enableFolding();
+    if (failed(applyPatternsGreedily(getOperation(), *patterns, config))) {
+      signalPassFailure();
+      return;
+    }
+
+    dumpModule(getOperation(), "pim2_folded");
+  }
+
+  std::shared_ptr<const FrozenRewritePatternSet> patterns;
+};
+
+} // namespace
+
+std::unique_ptr<Pass> createPimConstantFoldingPass() { return std::make_unique<PimConstantFoldingPass>(); }
+
+} // namespace onnx_mlir

src/PIM/Pass/PimFoldHostConstantsPass.cpp

@@ -1,181 +0,0 @@
-#include "mlir/Dialect/MemRef/IR/MemRef.h"
-#include "mlir/IR/BuiltinAttributes.h"
-#include "mlir/IR/BuiltinTypes.h"
-#include "mlir/IR/MLIRContext.h"
-#include "mlir/IR/PatternMatch.h"
-#include "mlir/Pass/Pass.h"
-#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
-
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/SmallBitVector.h"
-#include "llvm/ADT/SmallVector.h"
-
-#include <memory>
-
-#include "src/Accelerators/PIM/Common/PimCommon.hpp"
-#include "src/Accelerators/PIM/Dialect/Pim/PimOps.hpp"
-
-using namespace mlir;
-
-namespace onnx_mlir {
-
-namespace {
-
-static FailureOr<DenseElementsAttr> transposeDenseElements(DenseElementsAttr denseAttr, ArrayRef<int64_t> perms) {
-  auto tensorType = dyn_cast<RankedTensorType>(denseAttr.getType());
-  if (!tensorType)
-    return failure();
-
-  int64_t rank = tensorType.getRank();
-  if (static_cast<int64_t>(perms.size()) != rank)
-    return failure();
-
-  llvm::SmallBitVector seen(rank);
-  SmallVector<int64_t> transposedShape;
-  transposedShape.reserve(rank);
-  for (int64_t perm : perms) {
-    if (perm < 0 || perm >= rank || seen.test(perm))
-      return failure();
-    seen.set(perm);
-    transposedShape.push_back(tensorType.getShape()[perm]);
-  }
-
-  auto transposedType = RankedTensorType::get(transposedShape, tensorType.getElementType());
-  if (denseAttr.isSplat())
-    return DenseElementsAttr::get(transposedType, denseAttr.getSplatValue<Attribute>());
-
-  SmallVector<Attribute> originalValues(denseAttr.getValues<Attribute>());
-  SmallVector<Attribute> transposedValues(originalValues.size());
-
-  SmallVector<int64_t> originalStrides(rank, 1);
-  SmallVector<int64_t> transposedStrides(rank, 1);
-  for (int64_t dim = rank - 2; dim >= 0; --dim) {
-    originalStrides[dim] = originalStrides[dim + 1] * tensorType.getShape()[dim + 1];
-    transposedStrides[dim] = transposedStrides[dim + 1] * transposedShape[dim + 1];
-  }
-
-  SmallVector<int64_t> originalIndices(rank);
-  SmallVector<int64_t> transposedIndices(rank);
-  for (auto [linearIndex, value] : llvm::enumerate(originalValues)) {
-    int64_t remaining = static_cast<int64_t>(linearIndex);
-    for (int64_t dim = 0; dim < rank; ++dim) {
-      originalIndices[dim] = remaining / originalStrides[dim];
-      remaining %= originalStrides[dim];
-    }
-
-    for (int64_t dim = 0; dim < rank; ++dim)
-      transposedIndices[dim] = originalIndices[perms[dim]];
-
-    int64_t transposedLinearIndex = 0;
-    for (int64_t dim = 0; dim < rank; ++dim)
-      transposedLinearIndex += transposedIndices[dim] * transposedStrides[dim];
-
-    transposedValues[transposedLinearIndex] = value;
-  }
-
-  return DenseElementsAttr::get(transposedType, transposedValues);
-}
-
-struct FoldConstantTransposePattern final : OpRewritePattern<pim::PimTransposeOp> {
-  using OpRewritePattern::OpRewritePattern;
-
-  LogicalResult matchAndRewrite(pim::PimTransposeOp transposeOp, PatternRewriter& rewriter) const override {
-    auto resultType = dyn_cast<MemRefType>(transposeOp.getOutRes().getType());
-    if (!resultType || !resultType.hasStaticShape())
-      return failure();
-
-    auto sourceGetGlobal = transposeOp.getData().getDefiningOp<memref::GetGlobalOp>();
-    if (!sourceGetGlobal)
-      return failure();
-
-    auto moduleOp = transposeOp->getParentOfType<ModuleOp>();
-    if (!moduleOp)
-      return failure();
-
-    auto sourceGlobal = lookupGlobalForGetGlobal(moduleOp, sourceGetGlobal);
-    if (!sourceGlobal || !sourceGlobal.getConstant() || !sourceGlobal.getInitialValue())
-      return failure();
-
-    auto denseAttr = dyn_cast<DenseElementsAttr>(*sourceGlobal.getInitialValue());
-    if (!denseAttr)
-      return failure();
-
-    SmallVector<int64_t> perms;
-    perms.reserve(transposeOp.getPerms().size());
-    for (IntegerAttr attr : transposeOp.getPerms().getAsRange<IntegerAttr>())
-      perms.push_back(attr.getInt());
-    FailureOr<DenseElementsAttr> transposedAttr = transposeDenseElements(denseAttr, perms);
-    if (failed(transposedAttr))
-      return failure();
-
-    auto transposedShape = cast<RankedTensorType>(transposedAttr->getType()).getShape();
-    if (!llvm::equal(transposedShape, resultType.getShape()))
-      return failure();
-
-    MemRefType globalType = resultType;
-
-    auto globalName = sourceGlobal.getName().str() + "__folded_transpose";
-    unsigned suffix = 0;
-    while (moduleOp.lookupSymbol(globalName))
-      globalName = sourceGlobal.getName().str() + "__folded_transpose_" + std::to_string(++suffix);
-
-    auto visibility = rewriter.getStringAttr("private");
-    OpBuilder moduleBuilder(moduleOp.getBodyRegion());
-    moduleBuilder.setInsertionPointToStart(moduleOp.getBody());
-    auto newGlobal = memref::GlobalOp::create(moduleBuilder,
-                                              transposeOp.getLoc(),
-                                              globalName,
-                                              visibility,
-                                              globalType,
-                                              *transposedAttr,
-                                              /*constant=*/true,
-                                              sourceGlobal.getAlignmentAttr());
-
-    rewriter.setInsertionPoint(transposeOp);
-    auto newGetGlobal = memref::GetGlobalOp::create(rewriter, transposeOp.getLoc(), globalType, newGlobal.getName());
-
-    bool isAlwaysWeight =
-      !transposeOp->getUsers().empty()
-      && llvm::all_of(transposeOp->getUsers(), [](Operation* user) { return isa<pim::PimCoreOp>(user); });
-    if (isAlwaysWeight) {
-      markWeightAlways(newGlobal);
-      markWeightAlways(newGetGlobal);
-    }
-
-    rewriter.replaceOp(transposeOp, newGetGlobal.getResult());
-    return success();
-  }
-};
-
-struct PimFoldHostConstantsPass : PassWrapper<PimFoldHostConstantsPass, OperationPass<ModuleOp>> {
-  MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(PimFoldHostConstantsPass)
-
-  StringRef getArgument() const override { return "fold-pim-host-constants-pass"; }
-  StringRef getDescription() const override { return "Fold host-side constant expressions before PIM verification"; }
-
-  LogicalResult initialize(MLIRContext* context) override {
-    RewritePatternSet owningPatterns(context);
-    for (auto* dialect : context->getLoadedDialects())
-      dialect->getCanonicalizationPatterns(owningPatterns);
-    for (RegisteredOperationName op : context->getRegisteredOperations())
-      op.getCanonicalizationPatterns(owningPatterns, context);
-    owningPatterns.add<FoldConstantTransposePattern>(context);
-    patterns = std::make_shared<FrozenRewritePatternSet>(std::move(owningPatterns));
-    return success();
-  }
-
-  void runOnOperation() override {
-    GreedyRewriteConfig config;
-    config.enableFolding();
-    if (failed(applyPatternsGreedily(getOperation(), *patterns, config)))
-      signalPassFailure();
-  }
-
-  std::shared_ptr<const FrozenRewritePatternSet> patterns;
-};
-
-} // namespace
-
-std::unique_ptr<Pass> createPimFoldHostConstantsPass() { return std::make_unique<PimFoldHostConstantsPass>(); }
-
-} // namespace onnx_mlir

src/PIM/Pass/PimPasses.hpp

@@ -15,7 +15,7 @@ std::unique_ptr<mlir::Pass> createSpatialToPimPass();
 
 std::unique_ptr<mlir::Pass> createBufferizePimPass();
 
-std::unique_ptr<mlir::Pass> createPimFoldHostConstantsPass();
+std::unique_ptr<mlir::Pass> createPimConstantFoldingPass();
 
 std::unique_ptr<mlir::Pass> createPimHostVerificationPass();
 

src/PIM/PimAccelerator.cpp

@@ -73,7 +73,7 @@ void PimAccelerator::registerPasses(int optLevel) const {
   registerPass(createSpatialToGraphvizPass);
   registerPass(createSpatialToPimPass);
   registerPass(createBufferizePimPass);
-  registerPass(createPimFoldHostConstantsPass);
+  registerPass(createPimConstantFoldingPass);
   registerPass(createPimHostVerificationPass);
   registerPass(createEmitPimJsonPass);
 }