Add pack and concat fission pass

mindspore/ccsrc/backend/optimizer/ascend/ascend_backend_optimization.cc

@@ -97,6 +97,8 @@
 #include "backend/optimizer/ascend/format_type/remove_no_use_reshape_op.h"
 #include "backend/optimizer/ascend/ir_fusion/add_input_to_output.h"
 #include "backend/optimizer/ascend/format_type/remove_internal_output.h"
+#include "backend/optimizer/ascend/ir_fission/concat_fission.h"
+#include "backend/optimizer/ascend/ir_fission/pack_fission.h"
 #include "utils/context/ms_context.h"
 #include "utils/config_manager.h"
 #include "debug/anf_ir_dump.h"
@@ -153,6 +155,8 @@ void AddAscendBackendOptionalIRFusion(PassManager *ir_fusion_pm) {
   ir_fusion_pm->AddPass(std::make_shared<BatchNormGradInferFission>());
   ir_fusion_pm->AddPass(std::make_shared<SplitFission>());
   ir_fusion_pm->AddPass(std::make_shared<GetitemTuple>());
+  ir_fusion_pm->AddPass(std::make_shared<PackFission>());
+  ir_fusion_pm->AddPass(std::make_shared<ConcatFission>());
 }
 }  // namespace
 

mindspore/ccsrc/backend/optimizer/ascend/ir_fission/concat_fission.cc

@@ -0,0 +1,107 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "backend/optimizer/ascend/ir_fission/concat_fission.h"
+#include <memory>
+#include <vector>
+#include "backend/session/anf_runtime_algorithm.h"
+
+namespace mindspore {
+namespace opt {
+namespace {
+AnfNodePtr CreateNewConcat(const FuncGraphPtr &func_graph, const CNodePtr &origin_concat_cnode, size_t begin_index,
+                           size_t offset) {
+  MS_EXCEPTION_IF_NULL(func_graph);
+  MS_EXCEPTION_IF_NULL(origin_concat_cnode);
+  std::vector<AnfNodePtr> new_concat_inputs{NewValueNode(std::make_shared<Primitive>(prim::kPrimConcat->name()))};
+  for (size_t i = begin_index; i < begin_index + offset; ++i) {
+    new_concat_inputs.push_back(origin_concat_cnode->input(i));
+  }
+  CNodePtr new_concat = func_graph->NewCNode(new_concat_inputs);
+  MS_EXCEPTION_IF_NULL(new_concat);
+  new_concat->set_scope(origin_concat_cnode->scope());
+  // Set attrs
+  AnfAlgo::CopyNodeAttr(kAttrAxis, origin_concat_cnode, new_concat);
+  AnfAlgo::CopyNodeAttr(kAttrT, origin_concat_cnode, new_concat);
+  AnfAlgo::SetNodeAttr(kAttrN, MakeValue(SizeToInt(offset)), new_concat);
+  AnfAlgo::SetNodeAttr(kAttrInputNums, MakeValue(SizeToInt(offset)), new_concat);
+  std::vector<int> dyn_input_sizes{SizeToInt(offset)};
+  AnfAlgo::SetNodeAttr(kAttrDynInputSizes, MakeValue(dyn_input_sizes), new_concat);
+  // infer shape
+  auto input_shape = AnfAlgo::GetPrevNodeOutputInferShape(origin_concat_cnode, 0);
+  auto axis = AnfAlgo::GetNodeAttr<int>(origin_concat_cnode, kAttrAxis);
+  if (axis < 0) {
+    axis += input_shape.size();
+  }
+  auto output_shape = AnfAlgo::GetOutputInferShape(origin_concat_cnode, 0);
+  if (axis < 0 || axis >= SizeToInt(output_shape.size()) || axis >= SizeToInt(input_shape.size())) {
+    MS_LOG(EXCEPTION) << "The concat_dim value " << axis << "is out of range";
+  }
+  output_shape[axis] = input_shape[axis] * offset;
+  AnfAlgo::SetOutputInferTypeAndShape({AnfAlgo::GetOutputInferDataType(origin_concat_cnode, 0)}, {output_shape},
+                                      new_concat.get());
+  return new_concat;
+}
+}  // namespace
+
+const BaseRef ConcatFission::DefinePattern() const {
+  VarPtr Xs = std::make_shared<SeqVar>();
+  return VectorRef({prim::kPrimConcat, Xs});
+}
+
+const AnfNodePtr ConcatFission::Process(const FuncGraphPtr &func_graph, const AnfNodePtr &node,
+                                        const EquivPtr &) const {
+  MS_EXCEPTION_IF_NULL(func_graph);
+  MS_EXCEPTION_IF_NULL(node);
+  auto cnode = node->cast<CNodePtr>();
+  MS_EXCEPTION_IF_NULL(cnode);
+  // The real input begins with index 1.
+  size_t origin_input_size = cnode->inputs().size() - 1;
+  if (origin_input_size <= inputs_divisor_) {
+    return nullptr;
+  }
+  CNodePtr new_cnode = cnode;
+  while (origin_input_size > inputs_divisor_) {
+    MS_EXCEPTION_IF_NULL(new_cnode);
+    std::vector<AnfNodePtr> base_concat_inputs{NewValueNode(std::make_shared<Primitive>(prim::kPrimConcat->name()))};
+    size_t cur_input_index = 1;
+    // Divide the inputs of concat by inputs_divisor_.
+    while (origin_input_size - cur_input_index + 1 >= inputs_divisor_) {
+      base_concat_inputs.push_back(CreateNewConcat(func_graph, new_cnode, cur_input_index, inputs_divisor_));
+      cur_input_index += inputs_divisor_;
+    }
+    for (size_t i = cur_input_index; i <= origin_input_size; i++) {
+      base_concat_inputs.push_back(new_cnode->input(i));
+    }
+    CNodePtr base_concat = func_graph->NewCNode(base_concat_inputs);
+    MS_EXCEPTION_IF_NULL(base_concat);
+    base_concat->set_scope(new_cnode->scope());
+    base_concat->set_abstract(new_cnode->abstract());
+    // Set attrs
+    AnfAlgo::CopyNodeAttr(kAttrAxis, new_cnode, base_concat);
+    AnfAlgo::CopyNodeAttr(kAttrT, new_cnode, base_concat);
+    AnfAlgo::SetNodeAttr(kAttrN, MakeValue(SizeToInt(base_concat_inputs.size() - 1)), base_concat);
+    AnfAlgo::SetNodeAttr(kAttrInputNums, MakeValue(SizeToInt(base_concat_inputs.size() - 1)), base_concat);
+    std::vector<int> dyn_input_sizes{SizeToInt(base_concat_inputs.size() - 1)};
+    AnfAlgo::SetNodeAttr(kAttrDynInputSizes, MakeValue(dyn_input_sizes), base_concat);
+
+    new_cnode = base_concat;
+    origin_input_size = base_concat->inputs().size() - 1;
+  }
+
+  return new_cnode;
+}
+}  // namespace opt
+}  // namespace mindspore

mindspore/ccsrc/backend/optimizer/ascend/ir_fission/concat_fission.h

@@ -0,0 +1,37 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MINDSPORE_CCSRC_PRE_ACTIVATE_ASCEND_IR_FISSION_CONCAT_FISSION_H_
+#define MINDSPORE_CCSRC_PRE_ACTIVATE_ASCEND_IR_FISSION_CONCAT_FISSION_H_
+
+#include "backend/optimizer/common/optimizer.h"
+
+namespace mindspore {
+namespace opt {
+constexpr size_t kConcatInputsDivisor = 63;
+class ConcatFission : public PatternProcessPass {
+ public:
+  explicit ConcatFission(bool multigraph = true)
+      : PatternProcessPass("concat_fission", multigraph), inputs_divisor_(kConcatInputsDivisor) {}
+  ~ConcatFission() override = default;
+  const BaseRef DefinePattern() const override;
+  const AnfNodePtr Process(const FuncGraphPtr &, const AnfNodePtr &, const EquivPtr &) const override;
+
+ private:
+  size_t inputs_divisor_;
+};
+}  // namespace opt
+}  // namespace mindspore
+#endif  // MINDSPORE_CCSRC_PRE_ACTIVATE_ASCEND_IR_FISSION_CONCAT_FISSION_H_

mindspore/ccsrc/backend/optimizer/ascend/ir_fission/pack_fission.cc

@@ -0,0 +1,107 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "backend/optimizer/ascend/ir_fission/pack_fission.h"
+#include <memory>
+#include <vector>
+#include "backend/session/anf_runtime_algorithm.h"
+
+namespace mindspore {
+namespace opt {
+namespace {
+AnfNodePtr CreateNewPack(const FuncGraphPtr &func_graph, const CNodePtr &origin_pack_cnode, size_t begin_index,
+                         size_t offset) {
+  MS_EXCEPTION_IF_NULL(func_graph);
+  MS_EXCEPTION_IF_NULL(origin_pack_cnode);
+  std::vector<AnfNodePtr> new_pack_inputs{NewValueNode(std::make_shared<Primitive>(prim::kPrimPack->name()))};
+  for (size_t i = begin_index; i < begin_index + offset; ++i) {
+    new_pack_inputs.push_back(origin_pack_cnode->input(i));
+  }
+  CNodePtr new_pack = func_graph->NewCNode(new_pack_inputs);
+  MS_EXCEPTION_IF_NULL(new_pack);
+  new_pack->set_scope(origin_pack_cnode->scope());
+  new_pack->set_abstract(origin_pack_cnode->abstract());
+  AnfAlgo::CopyNodeAttr(kAttrAxis, origin_pack_cnode, new_pack);
+  AnfAlgo::SetNodeAttr(kAttrN, MakeValue(SizeToInt(offset)), new_pack);
+  AnfAlgo::SetNodeAttr(kAttrNum, MakeValue(SizeToInt(offset)), new_pack);
+  std::vector<int> dyn_input_sizes{SizeToInt(offset)};
+  AnfAlgo::SetNodeAttr(kAttrDynInputSizes, MakeValue(dyn_input_sizes), new_pack);
+  // infer shape
+  auto output_shape = AnfAlgo ::GetOutputInferShape(origin_pack_cnode, 0);
+  auto axis = AnfAlgo::GetNodeAttr<int>(new_pack, kAttrAxis);
+  if (axis < 0) {
+    axis += output_shape.size();
+  }
+  if (axis < 0) {
+    MS_LOG(EXCEPTION) << "The concat_dim value " << axis << "is out of range";
+  }
+  std::vector<size_t> new_shape;
+  for (size_t i = 0; i < output_shape.size() + 1; ++i) {
+    if (i < IntToSize(axis)) {
+      new_shape.push_back(output_shape[i]);
+    } else if (i == IntToSize(axis)) {
+      new_shape.push_back(offset);
+    } else {
+      new_shape.push_back(output_shape[i - 1]);
+    }
+  }
+  new_shape.erase(new_shape.begin() + axis + 1);
+  AnfAlgo::SetOutputInferTypeAndShape({AnfAlgo::GetOutputInferDataType(origin_pack_cnode, 0)}, {output_shape},
+                                      new_pack.get());
+  return new_pack;
+}
+}  // namespace
+
+const BaseRef PackFission::DefinePattern() const {
+  VarPtr Xs = std::make_shared<SeqVar>();
+  return VectorRef({prim::kPrimPack, Xs});
+}
+
+const AnfNodePtr PackFission::Process(const FuncGraphPtr &func_graph, const AnfNodePtr &node, const EquivPtr &) const {
+  MS_EXCEPTION_IF_NULL(func_graph);
+  MS_EXCEPTION_IF_NULL(node);
+  auto cnode = node->cast<CNodePtr>();
+  MS_EXCEPTION_IF_NULL(cnode);
+  // The real input begins with index 1.
+  size_t origin_input_size = cnode->inputs().size() - 1;
+  if (origin_input_size <= inputs_divisor_) {
+    return nullptr;
+  }
+  std::vector<AnfNodePtr> base_concat_inputs{NewValueNode(std::make_shared<Primitive>(prim::kPrimConcat->name()))};
+  size_t cur_input_index = 1;
+  // Divide the inputs of pack by inputs_divisor_.
+  while (origin_input_size - cur_input_index + 1 >= inputs_divisor_) {
+    base_concat_inputs.push_back(CreateNewPack(func_graph, cnode, cur_input_index, inputs_divisor_));
+    cur_input_index += inputs_divisor_;
+  }
+  if (cur_input_index <= origin_input_size) {
+    base_concat_inputs.push_back(
+      CreateNewPack(func_graph, cnode, cur_input_index, origin_input_size - cur_input_index + 1));
+  }
+
+  CNodePtr base_concat = func_graph->NewCNode(base_concat_inputs);
+  MS_EXCEPTION_IF_NULL(base_concat);
+  base_concat->set_scope(cnode->scope());
+  base_concat->set_abstract(cnode->abstract());
+  AnfAlgo::CopyNodeAttr(kAttrAxis, cnode, base_concat);
+  AnfAlgo::SetNodeAttr(kAttrN, MakeValue(SizeToInt(base_concat_inputs.size() - 1)), base_concat);
+  AnfAlgo::SetNodeAttr(kAttrInputNums, MakeValue(SizeToInt(base_concat_inputs.size() - 1)), base_concat);
+  std::vector<int> dyn_input_sizes{SizeToInt(base_concat_inputs.size() - 1)};
+  AnfAlgo::SetNodeAttr(kAttrDynInputSizes, MakeValue(dyn_input_sizes), base_concat);
+
+  return base_concat;
+}
+}  // namespace opt
+}  // namespace mindspore

mindspore/ccsrc/backend/optimizer/ascend/ir_fission/pack_fission.h

@@ -0,0 +1,37 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MINDSPORE_CCSRC_PRE_ACTIVATE_ASCEND_IR_FISSION_PACK_FISSION_H_
+#define MINDSPORE_CCSRC_PRE_ACTIVATE_ASCEND_IR_FISSION_PACK_FISSION_H_
+
+#include "backend/optimizer/common/optimizer.h"
+
+namespace mindspore {
+namespace opt {
+constexpr size_t kPackInputsDivisor = 63;
+class PackFission : public PatternProcessPass {
+ public:
+  explicit PackFission(bool multigraph = true)
+      : PatternProcessPass("pack_fission", multigraph), inputs_divisor_(kPackInputsDivisor) {}
+  ~PackFission() override = default;
+  const BaseRef DefinePattern() const override;
+  const AnfNodePtr Process(const FuncGraphPtr &, const AnfNodePtr &, const EquivPtr &) const override;
+
+ private:
+  size_t inputs_divisor_;
+};
+}  // namespace opt
+}  // namespace mindspore
+#endif  // MINDSPORE_CCSRC_PRE_ACTIVATE_ASCEND_IR_FISSION_PACK_FISSION_H_

mindspore/ccsrc/utils/utils.h

@@ -241,6 +241,9 @@ constexpr auto kAttrOffset = "offset";
 constexpr auto kAttrPsKey = "ps_key";
 constexpr auto kAttrOptimizerType = "optim_type";
 constexpr auto kAttrChildGraph = "child_graph";
+constexpr auto kAttrInputNums = "inputNums";
+constexpr auto kAttrT = "T";
+constexpr auto kAttrNum = "num";
 
 // attr value
 constexpr auto kValueTargetSwitch = "target_switch";

tests/ut/cpp/pre_activate/ascend/ir_fission/concat_fission_test.cc

@@ -0,0 +1,160 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "common/backend_common_test.h"
+#include "common/py_func_graph_fetcher.h"
+#define private public
+#define protected public
+#include "backend/optimizer/ascend/ir_fission/concat_fission.h"
+#undef private
+#undef protected
+
+namespace mindspore {
+namespace opt {
+class TestHWConcatFission : public BackendCommon {
+ public:
+  TestHWConcatFission() : get_py_fun_("gtest_input.pre_activate.concat_fission_test", true) {}
+  ~TestHWConcatFission() override = default;
+
+  UT::PyFuncGraphFetcher get_py_fun_;
+};
+
+TEST_F(TestHWConcatFission, test_concat_fission_divided_by_2) {
+  FuncGraphPtr g = get_py_fun_.CallAndParseRet("test_concat_fission", "before");
+  EXPECT_NE(g, nullptr);
+  std::vector<int> shp{2, 32, 224, 224};
+  auto x_abstract = std::make_shared<abstract::AbstractTensor>(kFloat32, shp);
+  AbstractBasePtrList args_spec_list;
+  for (size_t i = 0; i < 9; ++i) {
+    args_spec_list.push_back(x_abstract);
+  }
+  auto kg = GetKernelGraph(g, args_spec_list);
+
+  auto optimizer = std::make_shared<opt::GraphOptimizer>();
+  auto pm = std::make_shared<opt::PassManager>();
+  auto concat_fission = std::make_shared<opt::ConcatFission>();
+  concat_fission->inputs_divisor_ = 2;
+  pm->AddPass(concat_fission);
+  optimizer->AddPassManager(pm);
+  FuncGraphPtr new_graph = optimizer->Optimize(kg);
+
+  FuncGraphPtr g_after = get_py_fun_.CallAndParseRet("test_concat_fission", "after_divided_by_2");
+  EXPECT_NE(g_after, nullptr);
+  auto kg_after = GetKernelGraph(g_after, args_spec_list);
+  EXPECT_TRUE(CheckEqualGraph(kg_after, new_graph));
+}
+
+TEST_F(TestHWConcatFission, test_concat_fission_divided_by_3) {
+  FuncGraphPtr g = get_py_fun_.CallAndParseRet("test_concat_fission", "before");
+  EXPECT_NE(g, nullptr);
+  std::vector<int> shp{2, 32, 224, 224};
+  auto x_abstract = std::make_shared<abstract::AbstractTensor>(kFloat32, shp);
+  AbstractBasePtrList args_spec_list;
+  for (size_t i = 0; i < 9; ++i) {
+    args_spec_list.push_back(x_abstract);
+  }
+  auto kg = GetKernelGraph(g, args_spec_list);
+
+  auto optimizer = std::make_shared<opt::GraphOptimizer>();
+  auto pm = std::make_shared<opt::PassManager>();
+  auto concat_fission = std::make_shared<opt::ConcatFission>();
+  concat_fission->inputs_divisor_ = 3;
+  pm->AddPass(concat_fission);
+  optimizer->AddPassManager(pm);
+  FuncGraphPtr new_graph = optimizer->Optimize(kg);
+
+  FuncGraphPtr g_after = get_py_fun_.CallAndParseRet("test_concat_fission", "after_divided_by_3");
+  EXPECT_NE(g_after, nullptr);
+  auto kg_after = GetKernelGraph(g_after, args_spec_list);
+  EXPECT_TRUE(CheckEqualGraph(kg_after, new_graph));
+}
+
+TEST_F(TestHWConcatFission, test_concat_fission_divided_by_4) {
+  FuncGraphPtr g = get_py_fun_.CallAndParseRet("test_concat_fission", "before");
+  EXPECT_NE(g, nullptr);
+  std::vector<int> shp{2, 32, 224, 224};
+  auto x_abstract = std::make_shared<abstract::AbstractTensor>(kFloat32, shp);
+  AbstractBasePtrList args_spec_list;
+  for (size_t i = 0; i < 9; ++i) {
+    args_spec_list.push_back(x_abstract);
+  }
+  auto kg = GetKernelGraph(g, args_spec_list);
+
+  auto optimizer = std::make_shared<opt::GraphOptimizer>();
+  auto pm = std::make_shared<opt::PassManager>();
+  auto concat_fission = std::make_shared<opt::ConcatFission>();
+  concat_fission->inputs_divisor_ = 4;
+  pm->AddPass(concat_fission);
+  optimizer->AddPassManager(pm);
+  FuncGraphPtr new_graph = optimizer->Optimize(kg);
+
+  FuncGraphPtr g_after = get_py_fun_.CallAndParseRet("test_concat_fission", "after_divided_by_4");
+  EXPECT_NE(g_after, nullptr);
+  auto kg_after = GetKernelGraph(g_after, args_spec_list);
+  EXPECT_TRUE(CheckEqualGraph(kg_after, new_graph));
+}
+
+TEST_F(TestHWConcatFission, test_concat_fission_divided_by_8) {
+  FuncGraphPtr g = get_py_fun_.CallAndParseRet("test_concat_fission", "before");
+  EXPECT_NE(g, nullptr);
+  std::vector<int> shp{2, 32, 224, 224};
+  auto x_abstract = std::make_shared<abstract::AbstractTensor>(kFloat32, shp);
+  AbstractBasePtrList args_spec_list;
+  for (size_t i = 0; i < 9; ++i) {
+    args_spec_list.push_back(x_abstract);
+  }
+  auto kg = GetKernelGraph(g, args_spec_list);
+
+  auto optimizer = std::make_shared<opt::GraphOptimizer>();
+  auto pm = std::make_shared<opt::PassManager>();
+  auto concat_fission = std::make_shared<opt::ConcatFission>();
+  concat_fission->inputs_divisor_ = 8;
+  pm->AddPass(concat_fission);
+  optimizer->AddPassManager(pm);
+  FuncGraphPtr new_graph = optimizer->Optimize(kg);
+
+  FuncGraphPtr g_after = get_py_fun_.CallAndParseRet("test_concat_fission", "after_divided_by_8");
+  EXPECT_NE(g_after, nullptr);
+  auto kg_after = GetKernelGraph(g_after, args_spec_list);
+  EXPECT_TRUE(CheckEqualGraph(kg_after, new_graph));
+}
+
+TEST_F(TestHWConcatFission, test_concat_fission_divided_by_9) {
+  FuncGraphPtr g = get_py_fun_.CallAndParseRet("test_concat_fission", "before");
+  EXPECT_NE(g, nullptr);
+  std::vector<int> shp{2, 32, 224, 224};
+  auto x_abstract = std::make_shared<abstract::AbstractTensor>(kFloat32, shp);
+  AbstractBasePtrList args_spec_list;
+  for (size_t i = 0; i < 9; ++i) {
+    args_spec_list.push_back(x_abstract);
+  }
+  auto kg = GetKernelGraph(g, args_spec_list);
+
+  auto optimizer = std::make_shared<opt::GraphOptimizer>();
+  auto pm = std::make_shared<opt::PassManager>();
+  auto concat_fission = std::make_shared<opt::ConcatFission>();
+  concat_fission->inputs_divisor_ = 9;
+  pm->AddPass(concat_fission);
+  optimizer->AddPassManager(pm);
+  FuncGraphPtr new_graph = optimizer->Optimize(kg);
+
+  FuncGraphPtr g_after = get_py_fun_.CallAndParseRet("test_concat_fission", "after_divided_by_9");
+  EXPECT_NE(g_after, nullptr);
+  auto kg_after = GetKernelGraph(g_after, args_spec_list);
+  EXPECT_TRUE(CheckEqualGraph(kg_after, new_graph));
+}
+}  // namespace opt
+}  // namespace mindspore

tests/ut/cpp/pre_activate/ascend/ir_fission/pack_fission_test.cc

@@ -0,0 +1,83 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "common/backend_common_test.h"
+#include "common/py_func_graph_fetcher.h"
+#define private public
+#define protected public
+#include "backend/optimizer/ascend/ir_fission/pack_fission.h"
+#undef private
+#undef protected
+
+namespace mindspore {
+namespace opt {
+class TestHWPackFission : public BackendCommon {
+ public:
+  TestHWPackFission() : get_py_fun_("gtest_input.pre_activate.pack_fission_test", true) {}
+  ~TestHWPackFission() override = default;
+
+  UT::PyFuncGraphFetcher get_py_fun_;
+};
+
+TEST_F(TestHWPackFission, test_pack_fission_divided_by_3) {
+  FuncGraphPtr g = get_py_fun_.CallAndParseRet("test_pack_fission", "before");
+  EXPECT_NE(g, nullptr);
+  std::vector<int> shp{2, 32, 224, 224};
+  auto x_abstract = std::make_shared<abstract::AbstractTensor>(kFloat32, shp);
+  AbstractBasePtrList args_spec_list;
+  for (size_t i = 0; i < 9; ++i) {
+    args_spec_list.push_back(x_abstract);
+  }
+  auto kg = GetKernelGraph(g, args_spec_list);
+
+  auto optimizer = std::make_shared<opt::GraphOptimizer>();
+  auto pm = std::make_shared<opt::PassManager>();
+  auto pack_fission = std::make_shared<opt::PackFission>();
+  pack_fission->inputs_divisor_ = 3;
+  pm->AddPass(pack_fission);
+  optimizer->AddPassManager(pm);
+  FuncGraphPtr new_graph = optimizer->Optimize(kg);
+
+  FuncGraphPtr g_after = get_py_fun_.CallAndParseRet("test_pack_fission", "after_divided_by_3");
+  EXPECT_NE(g_after, nullptr);
+  EXPECT_TRUE(CheckEqualGraph(g_after, new_graph));
+}
+
+TEST_F(TestHWPackFission, test_pack_fission_divided_by_4) {
+  FuncGraphPtr g = get_py_fun_.CallAndParseRet("test_pack_fission", "before");
+  EXPECT_NE(g, nullptr);
+  std::vector<int> shp{2, 32, 224, 224};
+  auto x_abstract = std::make_shared<abstract::AbstractTensor>(kFloat32, shp);
+  AbstractBasePtrList args_spec_list;
+  for (size_t i = 0; i < 9; ++i) {
+    args_spec_list.push_back(x_abstract);
+  }
+  auto kg = GetKernelGraph(g, args_spec_list);
+
+  auto optimizer = std::make_shared<opt::GraphOptimizer>();
+  auto pm = std::make_shared<opt::PassManager>();
+  auto pack_fission = std::make_shared<opt::PackFission>();
+  pack_fission->inputs_divisor_ = 4;
+  pm->AddPass(pack_fission);
+  optimizer->AddPassManager(pm);
+  FuncGraphPtr new_graph = optimizer->Optimize(kg);
+
+  FuncGraphPtr g_after = get_py_fun_.CallAndParseRet("test_pack_fission", "after_divided_by_4");
+  EXPECT_NE(g_after, nullptr);
+  EXPECT_TRUE(CheckEqualGraph(g_after, new_graph));
+}
+}  // namespace opt
+}  // namespace mindspore

tests/ut/cpp/python_input/gtest_input/pre_activate/concat_fission_test.py

@@ -0,0 +1,73 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============================================================================
+
+from mindspore.ops import operations as P
+
+concat = P.Concat()
+
+
+class FnDict:
+    def __init__(self):
+        self.fnDict = {}
+
+    def __call__(self, fn):
+        self.fnDict[fn.__name__] = fn
+
+    def __getitem__(self, name):
+        return self.fnDict[name]
+
+
+def test_concat_fission(tag):
+    """ test_adam_apply_one_with_decay_rule """
+    fns = FnDict()
+
+    @fns
+    def before(input0, input1, input2, input3, input4, input5, input6, input7, input8):
+        return concat((input0, input1, input2, input3, input4, input5, input6, input7, input8))
+
+    @fns
+    def after_divided_by_2(input0, input1, input2, input3, input4, input5, input6, input7, input8):
+        a = concat((input0, input1))
+        b = concat((input2, input3))
+        c = concat((input4, input5))
+        d = concat((input6, input7))
+        f = concat((a, b))
+        g = concat((c, d))
+        i = concat((f, g))
+        return concat((i, input8))
+
+    @fns
+    def after_divided_by_3(input0, input1, input2, input3, input4, input5, input6, input7, input8):
+        a = concat((input0, input1, input2))
+        b = concat((input3, input4, input5))
+        c = concat((input6, input7, input8))
+        return concat((a, b, c))
+
+    @fns
+    def after_divided_by_4(input0, input1, input2, input3, input4, input5, input6, input7, input8):
+        a = concat((input0, input1, input2, input3))
+        b = concat((input4, input5, input6, input7))
+        return concat((a, b, input8))
+
+    @fns
+    def after_divided_by_8(input0, input1, input2, input3, input4, input5, input6, input7, input8):
+        a = concat((input0, input1, input2, input3, input4, input5, input6, input7))
+        return concat((a, input8))
+
+    @fns
+    def after_divided_by_9(input0, input1, input2, input3, input4, input5, input6, input7, input8):
+        return concat((input0, input1, input2, input3, input4, input5, input6, input7, input8))
+
+    return fns[tag]

tests/ut/cpp/python_input/gtest_input/pre_activate/pack_fission_test.py

@@ -0,0 +1,57 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============================================================================
+
+from mindspore.ops import operations as P
+from mindspore.ops import Primitive
+
+pack = P.Pack()
+concat = P.Concat()
+make_tuple = Primitive('make_tuple')
+
+
+class FnDict:
+    def __init__(self):
+        self.fnDict = {}
+
+    def __call__(self, fn):
+        self.fnDict[fn.__name__] = fn
+
+    def __getitem__(self, name):
+        return self.fnDict[name]
+
+
+def test_pack_fission(tag):
+    """ test_adam_apply_one_with_decay_rule """
+    fns = FnDict()
+
+    @fns
+    def before(input0, input1, input2, input3, input4, input5, input6, input7, input8):
+        return pack((input0, input1, input2, input3, input4, input5, input6, input7, input8))
+
+    @fns
+    def after_divided_by_3(input0, input1, input2, input3, input4, input5, input6, input7, input8):
+        pack1 = pack(input0, input1, input2)
+        pack2 = pack(input3, input4, input5)
+        pack3 = pack(input6, input7, input8)
+        return make_tuple(concat(pack1, pack2, pack3))
+
+    @fns
+    def after_divided_by_4(input0, input1, input2, input3, input4, input5, input6, input7, input8):
+        pack1 = pack(input0, input1, input2, input3)
+        pack2 = pack(input4, input5, input6, input7)
+        pack3 = pack(input8)
+        return make_tuple(concat(pack1, pack2, pack3))
+
+    return fns[tag]