!9072 fix topk fussion help tensor size = 4096*2

From: @jjfeing
Reviewed-by: @chujinjin,@kisnwang
Signed-off-by:

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

@@ -26,15 +26,13 @@
 #include "runtime/device/kernel_info.h"
 #include "utils/ms_context.h"
 
-namespace mindspore {
-namespace opt {
+namespace mindspore::opt {
 constexpr size_t kFloat16Len = 2;  // size of float16;
 constexpr size_t kTopkIndexK = 1;
 namespace {
-tensor::TensorPtr CreateTensor(const AnfNodePtr &node) {
+tensor::TensorPtr CreateTensor() {
   // 1 create tensor
-  auto shape = AnfAlgo::GetPrevNodeOutputInferShape(node, 0);
-  auto last_dim = shape[shape.size() - 1];
+  const size_t last_dim = 4096;
   std::vector<int64_t> indices_shape = {SizeToLong(last_dim * 2)};
   TensorTypePtr tensor_type = std::make_shared<TensorType>(kFloat16);
   MS_EXCEPTION_IF_NULL(tensor_type);
@@ -63,8 +61,8 @@ tensor::TensorPtr CreateTensor(const AnfNodePtr &node) {
   return indices_tensor;
 }
 
-ValueNodePtr CreateValueNode(const AnfNodePtr &node) {
-  tensor::TensorPtr indices_tensor = CreateTensor(node);
+ValueNodePtr CreateValueNode() {
+  tensor::TensorPtr indices_tensor = CreateTensor();
   MS_EXCEPTION_IF_NULL(indices_tensor);
   auto indices_const = std::make_shared<ValueNode>(indices_tensor);
   MS_EXCEPTION_IF_NULL(indices_const);
@@ -159,14 +157,14 @@ const AnfNodePtr TopKSplit::Process(const FuncGraphPtr &func_graph, const AnfNod
   MS_EXCEPTION_IF_NULL(value);
   auto tensor = value->cast<tensor::TensorPtr>();
   MS_EXCEPTION_IF_NULL(tensor);
-  int32_t *data = reinterpret_cast<int32_t *>(tensor->data_c());
+  auto *data = reinterpret_cast<int32_t *>(tensor->data_c());
   MS_EXCEPTION_IF_NULL(data);
   auto new_value_node = std::make_shared<ValueNode>(MakeValue(*data));
   new_cnode->set_input(kTopkIndexK + 1, new_value_node);
 
   std::unordered_set<size_t> attr_index{kTopkIndexK};
   ConstInputToAttr(new_cnode, attr_index);
-  auto indices_const = CreateValueNode(new_cnode);
+  auto indices_const = CreateValueNode();
   new_cnode->add_input(indices_const);
   MS_EXCEPTION_IF_NULL(supported_checker_);
   if (!supported_checker_->CheckAICoreSupported(new_cnode, CreateKernelBuildInfo())) {
@@ -181,5 +179,4 @@ const AnfNodePtr TopKSplit::Process(const FuncGraphPtr &func_graph, const AnfNod
 
   return new_cnode;
 }
-}  // namespace opt
-}  // namespace mindspore
+}  // namespace mindspore::opt

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

@@ -89,7 +89,7 @@ TEST_F(TestHWTopKSplit, test_topk_split) {
   EXPECT_TRUE(value_node->value()->isa<tensor::Tensor>());
   auto tensor = value_node->value()->cast<tensor::TensorPtr>();
   EXPECT_EQ(tensor->shape().size(), 1);
-  EXPECT_EQ(tensor->shape()[0], 8);
+  EXPECT_EQ(tensor->shape()[0], 4096*2);
 }
 
 TEST_F(TestHWTopKSplit, test_topk_no_split) {