add rewrite pattern form paddle op tp trt op (#41323)

paddle/infrt/dialect/tensorrt/convert.h

@@ -58,58 +58,110 @@ template <>
 }
 
 static mlir::Value createTRTConv2dOp(mlir::PatternRewriter &rewriter,  // NOLINT
-                                     mlir::Operation *op) {
+                                     mlir::Operation *op,
+                                     mlir::Value input,
+                                     mlir::Value filter) {
   auto conv_op = ::llvm::dyn_cast<infrt::pd::Conv2dOp>(op);
   ::mlir::SmallVector<::mlir::Value, 4> operands;
-  ::mlir::Operation::operand_range Input = conv_op.getODSOperands(0);
-  ::mlir::Operation::operand_range Filter = conv_op.getODSOperands(1);
-  operands.push_back((*Input.begin()));
-  operands.push_back((*Filter.begin()));
+  operands.push_back(input);
+  operands.push_back(filter);
 
   ::mlir::SmallVector<::mlir::Type, 4> resultTypes;
   for (auto v : conv_op.getODSResults(0)) {
     resultTypes.push_back(v.getType());
   }
+
   ::mlir::SmallVector<::mlir::NamedAttribute, 8> attributes;
-  {
-    // TODO(weishengying) :  get out_channel_num for filter shape
-    auto tblgen_attr = rewriter.getSI32IntegerAttr(3);
-    attributes.emplace_back(rewriter.getStringAttr("out_channel_num"),
-                            tblgen_attr);
+
+  auto *filter_producer = filter.getDefiningOp();
+  auto create_inited_tensor_op =
+      llvm::dyn_cast<::infrt::phi::CreateHostInitedDenseTensorOp>(
+          filter_producer);
+
+  CHECK_NOTNULL(create_inited_tensor_op);
+  mlir::ArrayAttr dims = create_inited_tensor_op.dims();
+  CHECK_EQ(dims.size(), 4U);
+  CHECK(dims[0].getType().isIntOrIndex());
+
+  const int32_t n_output = dims[0].cast<mlir::IntegerAttr>().getInt();
+  const int32_t filter_h = dims[2].cast<mlir::IntegerAttr>().getInt();
+  const int32_t filter_w = dims[3].cast<mlir::IntegerAttr>().getInt();
+
+  auto padding_attr = conv_op->getAttrOfType<::mlir::ArrayAttr>("paddings");
+  llvm::SmallVector<int32_t, 4> paddings(padding_attr.size());
+  for (size_t i = 0; i < padding_attr.size(); i++) {
+    paddings[i] = padding_attr[i].cast<mlir::IntegerAttr>().getInt();
   }
-  {
-    // TODO(weishengying) :  get kernel_size for filter shape
-    auto tblgen_attr = rewriter.getI32ArrayAttr({3, 3});
-    attributes.emplace_back(rewriter.getStringAttr("kernel_size"), tblgen_attr);
+
+  auto dilations_attr = conv_op->getAttrOfType<::mlir::ArrayAttr>("dilations");
+  llvm::SmallVector<int32_t> dilations(dilations_attr.size());
+  for (size_t i = 0; i < dilations_attr.size(); i++) {
+    dilations[i] = dilations_attr[i].cast<mlir::IntegerAttr>().getInt();
   }
-  {
-    auto tblgen_attr = op->getAttrOfType<::mlir::ArrayAttr>("strides");
-    attributes.emplace_back(rewriter.getStringAttr("strides"), tblgen_attr);
+
+  llvm::SmallVector<int32_t, 2> nv_paddings(2);
+  llvm::SmallVector<int32_t, 4> nv_pre_paddings(2);
+  llvm::SmallVector<int32_t, 4> nv_post_paddings(2);
+  llvm::SmallVector<int32_t, 2> nv_dilations({dilations[0], dilations[1]});
+  int32_t nv_padding_mode = 0;  // nvinfer1::PaddingMode::kEXPLICIT_ROUND_DOWN
+  auto padding_algorithm_attr =
+      conv_op->getAttrOfType<::mlir::StringAttr>("padding_algorithm");
+  if (padding_algorithm_attr.strref() == "VALID") {
+    for (size_t i = 0; i < paddings.size(); i++) {
+      paddings[i] = 0;
+    }
   }
-  {
-    auto tblgen_attr = op->getAttrOfType<::mlir::ArrayAttr>("paddings");
-    attributes.emplace_back(rewriter.getStringAttr("paddings"), tblgen_attr);
+  if (padding_algorithm_attr.strref() == "SAME") {
+    nv_padding_mode = 2;  // nvinfer1::PaddingMode::kSAME_UPPER
+    nv_dilations[0] = 1;
+    nv_dilations[1] = 1;
   }
-  {
-    auto tblgen_attr =
-        op->getAttrOfType<::mlir::StringAttr>("padding_algorithm");
-    attributes.emplace_back(rewriter.getStringAttr("padding_mode"),
-                            tblgen_attr);
+
+  if (paddings.size() == 2) {
+    nv_paddings[0] = paddings[0];
+    nv_paddings[1] = paddings[1];
+  } else {
+    CHECK_EQ(paddings.size(), 4U);
+    nv_pre_paddings[0] = paddings[0];
+    nv_pre_paddings[1] = paddings[2];
+    nv_post_paddings[0] = paddings[1];
+    nv_post_paddings[1] = paddings[3];
   }
+
+  attributes.emplace_back(rewriter.getStringAttr("out_channel_num"),
+                          rewriter.getSI32IntegerAttr(n_output));
+
+  attributes.emplace_back(rewriter.getStringAttr("kernel_size"),
+                          rewriter.getI32ArrayAttr({filter_h, filter_w}));
+
+  attributes.emplace_back(
+      rewriter.getStringAttr("dilations"),
+      rewriter.getI32ArrayAttr({nv_dilations[0], nv_dilations[1]}));
+
+  attributes.emplace_back(rewriter.getStringAttr("padding_mode"),
+                          rewriter.getSI32IntegerAttr(nv_padding_mode));
+
+  attributes.emplace_back(rewriter.getStringAttr("paddings"),
+                          rewriter.getI32ArrayAttr({paddings[0], paddings[1]}));
+
+  attributes.emplace_back(
+      rewriter.getStringAttr("pre_paddings"),
+      rewriter.getI32ArrayAttr({nv_pre_paddings[0], nv_pre_paddings[1]}));
+
+  attributes.emplace_back(
+      rewriter.getStringAttr("post_paddings"),
+      rewriter.getI32ArrayAttr({nv_post_paddings[0], nv_post_paddings[1]}));
+
   {
-    auto tblgen_attr = op->getAttrOfType<::mlir::IntegerAttr>("groups");
+    auto tblgen_attr = conv_op->getAttrOfType<::mlir::IntegerAttr>("groups");
     attributes.emplace_back(rewriter.getStringAttr("groups"), tblgen_attr);
   }
   {
-    auto tblgen_attr = op->getAttrOfType<::mlir::ArrayAttr>("dilations");
-    attributes.emplace_back(rewriter.getStringAttr("dilations"), tblgen_attr);
-  }
-  {
-    auto tblgen_attr = op->getAttrOfType<::mlir::StringAttr>("data_format");
-    attributes.emplace_back(rewriter.getStringAttr("data_format"), tblgen_attr);
+    auto tblgen_attr = conv_op->getAttrOfType<::mlir::ArrayAttr>("strides");
+    attributes.emplace_back(rewriter.getStringAttr("strides"), tblgen_attr);
   }
   return rewriter.create<trt::ConvolutionOp>(
-      op->getLoc(), resultTypes, operands, attributes);
+      conv_op->getLoc(), resultTypes, operands, attributes);
 }
 
 static inline mlir::ArrayAttr TransposeWeight(
@@ -193,51 +245,6 @@ inline ::llvm::SmallVector<::mlir::Value, 4> createTrtFcOp(
   return tblgen_repl_values;
 }
 
-static mlir::Value createTRTShuffledOp(
-    mlir::PatternRewriter &rewriter,  // NOLINT
-    mlir::Operation *op,
-    const mlir::Value &input,
-    const mlir::Attribute &start,
-    const mlir::Attribute &stop) {
-  auto flatten_op = ::llvm::dyn_cast<infrt::pd::Flatten_contiguous_rangeOp>(op);
-  ::mlir::SmallVector<::mlir::Value, 4> operands;
-  operands.push_back(input);
-
-  ::mlir::SmallVector<::mlir::Type, 4> resultTypes;
-  for (auto v : flatten_op.getODSResults(0)) {
-    resultTypes.push_back(v.getType());
-  }
-
-  ::mlir::SmallVector<::mlir::NamedAttribute, 8> attributes;
-  mlir::IntegerAttr start_attr = start.dyn_cast<mlir::IntegerAttr>();
-  mlir::IntegerAttr stop_attr = stop.dyn_cast<mlir::IntegerAttr>();
-
-  int start_axis = start_attr.getSInt();
-  int stop_axis = stop_attr.getSInt();
-  // TODO(weishengying) : get dim form DenseTonsor
-  int dims = 4;
-  // TODO(weishengying) : get input_dims form DenseTonsor
-  int input_dims[4] = {1, 2048, 1, 1};
-  int dim_prod = 1;
-
-  std::vector<int> flatten_dim(dims - (stop_axis - start_axis));
-  for (int i = 0, j = 0; i < dims; ++i) {
-    if (start_axis <= i + 1 && i + 1 <= stop_axis) {
-      int dim_i = input_dims[i];
-      dim_prod *= dim_i;
-      if (i + 1 == stop_axis) {
-        flatten_dim[j++] = dim_prod;
-      }
-    } else {
-      flatten_dim[j++] = input_dims[i];
-    }
-  }
-  auto reshape_arrt = rewriter.getI32ArrayAttr(flatten_dim);
-  attributes.emplace_back(rewriter.getStringAttr("reshape"), reshape_arrt);
-  return rewriter.create<trt::ShuffleOp>(
-      op->getLoc(), resultTypes, operands, attributes);
-}
-
 inline mlir::IntegerAttr CreatePoolingType(
     mlir::PatternRewriter &builder,  // NOLINT
     mlir::StringAttr pool_type) {
@@ -339,17 +346,17 @@ inline ::llvm::SmallVector<::mlir::Value, 4> CreatePaddleTrtPoolingOp(
   PoolingOp pool_op;
   {
     auto ods_loc = builder.getFusedLoc({input_producer->getLoc()});
-    builder.create<PoolingOp>(ods_loc,
-                              input.getType(),
-                              input,
-                              pool_type_attr,
-                              ksize,
-                              strides,
-                              paddings_attr,
-                              padding_mode_attr,
-                              exclusive,
-                              adaptive,
-                              padding_algorithm);
+    pool_op = builder.create<PoolingOp>(ods_loc,
+                                        input.getType(),
+                                        input,
+                                        pool_type_attr,
+                                        ksize,
+                                        strides,
+                                        paddings_attr,
+                                        padding_mode_attr,
+                                        exclusive,
+                                        adaptive,
+                                        padding_algorithm);
   }
 
   for (auto v :

paddle/infrt/dialect/tensorrt/pd_lower_to_trt.td

@@ -25,11 +25,11 @@ def PD2TRT_Relu6_Lower : Pat<
         (PD_Relu6Op $X, $threshold),
         (TRT_ActivationOp $X, (TRT_createNvinferEnumAttr<"nvinfer1::ActivationType", "kCLIP">), (INFRT_createF32Attr<"0.0">), $threshold)>;
 
-def createTRTConv2dOp : NativeCodeCall<"createTRTConv2dOp($_builder, $0.getDefiningOp())">;
+def createTRTConv2dOp : NativeCodeCall<"createTRTConv2dOp($_builder, $0.getDefiningOp(), $1, $2)">;
 
 def PD2TRT_Conv2d_Lower : Pat<
         (PD_Conv2dOp:$old_value $Input, $Filter, $strides, $paddings, $padding_algorithm, $groups, $dilations, $data_format),
-        (createTRTConv2dOp $old_value)>;
+        (createTRTConv2dOp $old_value, $Input, $Filter)>;
 
 def createTrtPoolingOp : NativeCodeCall<"::infrt::trt::CreatePaddleTrtPoolingOp($_builder, $0, $1, $2, $3, $4, $5, $6, $7, $8, $9, $10)">;
 def PD2TRT_Pooling_Lower : Pat<
@@ -50,9 +50,7 @@ def PD2TRT_Fc_Lower : Pat<
         (PD_Elementwise_addOp:$elt_out (PD_Matmul_v2Op $X, $Y, $trans_x, $trans_y), $elt_y, $axis),
         (createTrtFcOp $X, $Y, $elt_y, $elt_out)>;
 
-def createTRTShuffledOp : NativeCodeCall<"createTRTShuffledOp($_builder, $0.getDefiningOp(), $1, $2, $3)">;
-
 def PD2TRT_Flatten_contiguous_range_Lower : Pat<
-        (PD_Flatten_contiguous_rangeOp:$out $input, $start_axis, $end_axis),
-        (createTRTShuffledOp $out, $input, $start_axis, $end_axis)>;
+        (PD_Flatten_contiguous_rangeOp $input, $start_axis, $end_axis),
+        (TRT_ShuffleOp $input, $start_axis, $end_axis)>;
 #endif // PD_LOWER_TO_TRT

paddle/infrt/dialect/tensorrt/trt_op_converter_pass.cc

@@ -92,20 +92,122 @@ struct PD2TRT_Batch_Norm_Lower : public ::mlir::RewritePattern {
     ::mlir::Operation::operand_range Input = casted_op.getODSOperands(0);
     ::mlir::Operation::operand_range Scale = casted_op.getODSOperands(1);
     ::mlir::Operation::operand_range Bias = casted_op.getODSOperands(2);
+    ::mlir::Operation::operand_range Mean = casted_op.getODSOperands(3);
+    ::mlir::Operation::operand_range Variance = casted_op.getODSOperands(4);
+    operands.push_back(Input[0]);
+    operands.push_back(Bias[0]);
+    operands.push_back(Scale[0]);
 
     // TODO(weishengying) : recompute this via params
-    operands.push_back((*Input.begin()));
-    operands.push_back((*Scale.begin()));
-    operands.push_back((*Bias.begin()));
-    operands.push_back((*Bias.begin()));
+    auto *scale_producer = Scale[0].getDefiningOp();
+    auto create_scale_tensor_op =
+        llvm::dyn_cast<::infrt::phi::CreateHostInitedDenseTensorOp>(
+            scale_producer);
+    CHECK_NOTNULL(create_scale_tensor_op);
 
-    trt::ScaleNdOp scaleNd_op;
-    // inputs
-    ::mlir::SmallVector<::mlir::Value, 4> trt_inputs;
-    for (auto v : operands) {
-      trt_inputs.push_back(v);
+    auto *bias_producer = Bias[0].getDefiningOp();
+    auto create_bias_tensor_op =
+        llvm::dyn_cast<::infrt::phi::CreateHostInitedDenseTensorOp>(
+            bias_producer);
+    CHECK_NOTNULL(create_bias_tensor_op);
+
+    auto *mean_producer = Mean[0].getDefiningOp();
+    auto create_mean_tensor_op =
+        llvm::dyn_cast<::infrt::phi::CreateHostInitedDenseTensorOp>(
+            mean_producer);
+    CHECK_NOTNULL(create_mean_tensor_op);
+
+    auto *variance_producer = Variance[0].getDefiningOp();
+    auto create_variance_tensor_op =
+        llvm::dyn_cast<::infrt::phi::CreateHostInitedDenseTensorOp>(
+            variance_producer);
+    CHECK_NOTNULL(create_variance_tensor_op);
+
+    llvm::SmallVector<double> scale_data;
+    mlir::ArrayAttr scale_array_attr = create_scale_tensor_op.values();
+    CHECK_GT(scale_array_attr.size(), 0U);
+    CHECK(scale_array_attr[0].getType().isF32());
+    scale_data.resize(scale_array_attr.size());
+    for (size_t i = 0; i < scale_array_attr.size(); i++) {
+      scale_data[i] =
+          scale_array_attr[i].cast<mlir::FloatAttr>().getValueAsDouble();
+    }
+
+    llvm::SmallVector<double> bias_data;
+    mlir::ArrayAttr bias_array_attr = create_bias_tensor_op.values();
+    CHECK_GT(bias_array_attr.size(), 0U);
+    CHECK(bias_array_attr[0].getType().isF32());
+    bias_data.resize(bias_array_attr.size());
+    for (size_t i = 0; i < bias_array_attr.size(); i++) {
+      bias_data[i] =
+          bias_array_attr[i].cast<mlir::FloatAttr>().getValueAsDouble();
     }
 
+    llvm::SmallVector<double> mean_data;
+    mlir::ArrayAttr mean_array_attr = create_mean_tensor_op.values();
+    CHECK_GT(mean_array_attr.size(), 0U);
+    CHECK(mean_array_attr[0].getType().isF32());
+    mean_data.resize(mean_array_attr.size());
+    for (size_t i = 0; i < mean_array_attr.size(); i++) {
+      mean_data[i] =
+          mean_array_attr[i].cast<mlir::FloatAttr>().getValueAsDouble();
+    }
+
+    llvm::SmallVector<double> variance_data;
+    mlir::ArrayAttr variance_array_attr = create_variance_tensor_op.values();
+    CHECK_GT(variance_array_attr.size(), 0U);
+    CHECK(variance_array_attr[0].getType().isF32());
+    variance_data.resize(variance_array_attr.size());
+    for (size_t i = 0; i < variance_array_attr.size(); i++) {
+      variance_data[i] =
+          variance_array_attr[i].cast<mlir::FloatAttr>().getValueAsDouble();
+    }
+
+    double eps = casted_op.epsilonAttr().getValueAsDouble();
+
+    llvm::SmallVector<float> combile_scale_data;
+    combile_scale_data.resize(scale_data.size());
+    llvm::SmallVector<float> combile_bias_data;
+    combile_bias_data.resize(bias_data.size());
+
+    size_t ele_num = combile_scale_data.size();
+    for (size_t i = 0; i < ele_num; i++) {
+      float scale = scale_data[i];
+      float bias = bias_data[i];
+      float mean = mean_data[i];
+      float variance = variance_data[i];
+      combile_scale_data[i] = scale / sqrtf(variance + eps);
+      combile_bias_data[i] = bias - mean * combile_scale_data[i];
+    }
+
+    rewriter.setInsertionPoint(create_scale_tensor_op);
+    auto new_scale_op =
+        rewriter.create<::infrt::phi::CreateHostInitedDenseTensorOp>(
+            create_scale_tensor_op->getLoc(),
+            create_scale_tensor_op.output().getType(),
+            create_scale_tensor_op.context(),
+            create_bias_tensor_op.dims(),
+            ::infrt::LayoutAttr::get(rewriter.getContext(),
+                                     ::infrt::LayoutType::NCHW),
+            create_scale_tensor_op.lod(),
+            rewriter.getF32ArrayAttr(combile_scale_data));
+    rewriter.replaceOp(create_scale_tensor_op, new_scale_op->getResults());
+
+    rewriter.setInsertionPoint(create_bias_tensor_op);
+    auto new_bias_op =
+        rewriter.create<::infrt::phi::CreateHostInitedDenseTensorOp>(
+            create_bias_tensor_op->getLoc(),
+            create_bias_tensor_op.output().getType(),
+            create_bias_tensor_op.context(),
+            create_bias_tensor_op.dims(),
+            ::infrt::LayoutAttr::get(rewriter.getContext(),
+                                     ::infrt::LayoutType::NCHW),
+            create_bias_tensor_op.lod(),
+            rewriter.getF32ArrayAttr(combile_bias_data));
+    rewriter.replaceOp(create_bias_tensor_op, new_bias_op->getResults());
+
+    rewriter.setInsertionPoint(op);
+    trt::ScaleNdOp scaleNd_op;
     // resultTypes
     ::mlir::SmallVector<::mlir::Type, 4> resultTypes;
     for (auto v : casted_op.getODSResults(0)) {
@@ -114,15 +216,6 @@ struct PD2TRT_Batch_Norm_Lower : public ::mlir::RewritePattern {
 
     // attributes
     ::mlir::SmallVector<::mlir::NamedAttribute, 8> attributes;
-    {
-      auto mode_attr = rewriter.getI32IntegerAttr(1);
-      attributes.emplace_back(rewriter.getStringAttr("mode"), mode_attr);
-    }
-
-    {
-      auto axis_attr = rewriter.getI32IntegerAttr(-1);
-      attributes.emplace_back(rewriter.getStringAttr("axis"), axis_attr);
-    }
     auto result = rewriter
                       .create<trt::ScaleNdOp>(
                           op->getLoc(), resultTypes, operands, attributes)

paddle/infrt/dialect/tensorrt/trt_ops.td

@@ -81,7 +81,9 @@ def TRT_ConvolutionOp : TRT_Op<"Convolution", [NoSideEffect]> {
     I32ArrayAttr:$kernel_size,
     I32ArrayAttr:$strides,
     I32ArrayAttr:$paddings,
-    StrAttr:$padding_mode,
+    I32ArrayAttr:$pre_paddings,
+    I32ArrayAttr:$post_paddings,
+    DefaultValuedAttr<SI32Attr, "0">:$padding_mode, //kEXPLICIT_ROUND_DOWN
     SI32Attr:$groups,
     I32ArrayAttr:$dilations
   );
@@ -97,11 +99,11 @@ def TRT_PoolingOp : TRT_Op<"Pooling", [NoSideEffect]> {
   }];
   let arguments = (ins
     DenseTensor:$input_tensor,
-    I32Attr:$pool_type,
+    SI32Attr:$pool_type,
     I32ArrayAttr:$window_size,
     I32ArrayAttr:$strides,
     I32ArrayAttr:$paddings,
-    I32Attr:$padding_mode,
+    SI32Attr:$padding_mode,
     BoolAttr:$exclusive,
     BoolAttr:$adaptive,
     StrAttr:$padding_algorithm
@@ -195,11 +197,9 @@ def TRT_ScaleNdOp : TRT_Op<"ScaleNd", [NoSideEffect]> {
   }];
   let arguments = (ins  
     DenseTensor:$input_tensor,
-    I32Attr:$mode,
     DenseTensor:$shift,
     DenseTensor:$scale,
-    DenseTensor:$power,
-    I32Attr:$axis
+    Optional<DenseTensor>:$power
   );
 
   let results = (outs DenseTensor:$Out);
@@ -214,7 +214,8 @@ def TRT_ShuffleOp : TRT_Op<"Shuffle", [NoSideEffect]> {
   }];
   let arguments = (ins  
     DenseTensor:$input_tensor,
-    I32ArrayAttr:$reshape
+    DefaultValuedAttr<SI32Attr, "1">:$start_axis,
+    DefaultValuedAttr<SI32Attr, "1">:$stop_axis
   );
 
   let results = (outs DenseTensor:$Out);

paddle/infrt/kernel/tensorrt/trt_kernels.cc

@@ -141,6 +141,12 @@ namespace tensorrt {
       ConvFunc(op, network.get(), value_to_trt_tensor_map, value_to_tensor_map);
     } else if (trt::PoolingOp op = llvm::dyn_cast<trt::PoolingOp>(operation)) {
       PoolFunc(op, network.get(), value_to_trt_tensor_map, value_to_tensor_map);
+    } else if (trt::ShuffleOp op = llvm::dyn_cast<trt::ShuffleOp>(operation)) {
+      ShuffleFunc(
+          op, network.get(), value_to_trt_tensor_map, value_to_tensor_map);
+    } else if (trt::ScaleNdOp op = llvm::dyn_cast<trt::ScaleNdOp>(operation)) {
+      ScaleNdFunc(
+          op, network.get(), value_to_trt_tensor_map, value_to_tensor_map);
     } else {
       CHECK(false) << "not supported operation.";
     }

paddle/infrt/kernel/tensorrt/trt_layers.h

@@ -151,6 +151,77 @@ inline void FcFunc(trt::FullyConnectedOp& op,  // NOLINT
   nvinfer1::ITensor* out_tensor = layer->getOutput(0);
   value_to_trt_tensor_map[out_repr] = out_tensor;
 }
+
+inline void ShuffleFunc(trt::ShuffleOp& op,  // NOLINT
+                        nvinfer1::INetworkDefinition* network,
+                        ValueToITensorMap& value_to_trt_tensor_map,  // NOLINT
+                        ValueToTensorMap& value_to_tensor_map) {     // NOLINT
+  mlir::Value input_tensor_repr = op.input_tensor();
+  nvinfer1::ITensor* input = value_to_trt_tensor_map[input_tensor_repr];
+  int dims = input->getDimensions().nbDims;
+
+  int start_axis = op.start_axisAttr().getInt();
+  int stop_axis = op.start_axisAttr().getInt();
+
+  nvinfer1::IShuffleLayer* layer = nullptr;
+  if (start_axis < 0) start_axis += dims + 1;
+  if (stop_axis < 0) stop_axis += dims + 1;
+
+  int dim_prod = 1;
+  nvinfer1::Dims flatten_dim;
+  flatten_dim.nbDims = dims - (stop_axis - start_axis);
+  for (int i = 0, j = 0; i < dims; ++i) {
+    if (start_axis <= i + 1 && i + 1 <= stop_axis) {
+      int dim_i = input->getDimensions().d[i];
+      CHECK_GT(dim_i, 0);
+      dim_prod *= dim_i;
+      if (i + 1 == stop_axis) {
+        flatten_dim.d[j++] = dim_prod;
+      }
+    } else {
+      flatten_dim.d[j++] = input->getDimensions().d[i];
+    }
+  }
+  layer = network->addShuffle(*value_to_trt_tensor_map[input_tensor_repr]);
+  CHECK_NOTNULL(layer);
+  layer->setReshapeDimensions(flatten_dim);
+
+  for (size_t i = 0; i < op->getNumResults(); ++i) {
+    nvinfer1::ITensor* out_tensor = layer->getOutput(i);
+    mlir::Value out_value = op->getResult(i);
+    value_to_trt_tensor_map[out_value] = out_tensor;
+  }
+}
+
+inline void ScaleNdFunc(trt::ScaleNdOp& op,  // NOLINT
+                        nvinfer1::INetworkDefinition* network,
+                        ValueToITensorMap& value_to_trt_tensor_map,  // NOLINT
+                        ValueToTensorMap& value_to_tensor_map) {     // NOLINT
+  mlir::Value input_tensor_repr = op.input_tensor();
+  nvinfer1::ITensor* input = value_to_trt_tensor_map[input_tensor_repr];
+
+  mlir::Value shift_tensor_repr = op.shift();
+  nvinfer1::Weights shift =
+      TensorToWeights(value_to_tensor_map[shift_tensor_repr]);
+
+  mlir::Value scale_tensor_repr = op.scale();
+
+  nvinfer1::Weights scale =
+      TensorToWeights(value_to_tensor_map[scale_tensor_repr]);
+
+  nvinfer1::Weights power_weights{nvinfer1::DataType::kFLOAT, nullptr, 0};
+
+  nvinfer1::IScaleLayer* layer = nullptr;
+  layer = network->addScaleNd(
+      *input, nvinfer1::ScaleMode::kCHANNEL, shift, scale, power_weights, 0);
+  CHECK_NOTNULL(layer);
+
+  for (size_t i = 0; i < op->getNumResults(); ++i) {
+    nvinfer1::ITensor* out_tensor = layer->getOutput(i);
+    mlir::Value out_value = op->getResult(i);
+    value_to_trt_tensor_map[out_value] = out_tensor;
+  }
+}
 }  // namespace tensorrt
 }  // namespace kernel
 }  // namespace infrt