[cherry-pick][hybrid performance] optim npu coalesce set constant (#35105) (#35302)

paddle/fluid/operators/coalesce_tensor_op.cc

@@ -30,8 +30,14 @@ namespace operators {
 template <typename DeviceContext>
 struct FillConstantVisitor {
   FillConstantVisitor(const DeviceContext &dev_ctx,
-                      framework::LoDTensor *tensor, const float value)
-      : dev_ctx_(dev_ctx), tensor_(tensor), value_(value) {}
+                      framework::LoDTensor *tensor, const float value,
+                      framework::proto::VarType::Type dtype,
+                      const framework::ExecutionContext &context)
+      : dev_ctx_(dev_ctx),
+        tensor_(tensor),
+        value_(value),
+        dtype_(dtype),
+        context_(context) {}
 
   template <typename T>
   void apply(typename std::enable_if<std::is_same<T, int8_t>::value ||
@@ -47,7 +53,17 @@ struct FillConstantVisitor {
                  * = nullptr) const {
 #ifdef PADDLE_WITH_ASCEND_CL
     if (platform::is_npu_place(dev_ctx_.GetPlace())) {
-      FillNpuTensorWithConstant<T>(tensor_, static_cast<T>(value_));
+      Tensor tensor_tmp(dtype_);
+      tensor_tmp.mutable_data<T>({1}, context_.GetPlace());
+      FillNpuTensorWithConstant<T>(&tensor_tmp, static_cast<T>(value_));
+
+      const auto &runner =
+          NpuOpRunner("FillD", {tensor_tmp}, {*tensor_},
+                      {{"dims", framework::vectorize(tensor_->dims())}});
+      auto stream =
+          context_.template device_context<paddle::platform::NPUDeviceContext>()
+              .stream();
+      runner.Run(stream);
     } else {
       math::SetConstant<DeviceContext, T> set_constant;
       set_constant(dev_ctx_, tensor_, static_cast<T>(value_));
@@ -61,6 +77,8 @@ struct FillConstantVisitor {
   const DeviceContext &dev_ctx_;
   framework::LoDTensor *tensor_;
   float value_;
+  framework::proto::VarType::Type dtype_;
+  const framework::ExecutionContext &context_;
 };
 
 template <typename DeviceContext, typename T>
@@ -165,7 +183,8 @@ class CoalesceTensorOpKernel : public framework::OpKernel<T> {
     } else if (context.Attr<bool>("set_constant")) {
       framework::VisitDataType(
           dtype, FillConstantVisitor<DeviceContext>(
-                     dev_ctx, fused_tensor, context.Attr<float>("constant")));
+                     dev_ctx, fused_tensor, context.Attr<float>("constant"),
+                     dtype, context));
     } else if (context.Attr<bool>("persist_output")) {
       for (size_t i = 0; i < out_var_names.size(); ++i) {
         size_t len = static_cast<size_t>(out_tensors[i]->numel());