diff --git a/paddle/phi/kernels/impl/elementwise_grad_kernel_impl.h b/paddle/phi/kernels/impl/elementwise_grad_kernel_impl.h
index 0dde78f30dabb..65e63f35c12fe 100644
--- a/paddle/phi/kernels/impl/elementwise_grad_kernel_impl.h
+++ b/paddle/phi/kernels/impl/elementwise_grad_kernel_impl.h
@@ -71,9 +71,12 @@ void AddDoubleGradImpl(const Context& dev_ctx,
     auto out_shape = dout.dims();
     dev_ctx.template Alloc<T>(ddout);
     if (ddx_tensor == nullptr && ddy_tensor == nullptr) {
+      VLOG(4) << "Special case when ddx and ddy are not needed\n";
       ddout = nullptr;
     } else if (ddx_tensor == nullptr && ddy_tensor != nullptr) {
       if (ddy_tensor->dims() != out_shape) {
+        VLOG(4) << "Special case when ddx is not needed and ddy needs to "
+                   "broadcast\n";
         std::vector<const DenseTensor*> ins = {ddy_tensor};
         std::vector<DenseTensor*> outs = {ddout};
         ExpandKernel<T, Context>(dev_ctx,
@@ -81,10 +84,14 @@ void AddDoubleGradImpl(const Context& dev_ctx,
                                  IntArray{phi::vectorize<int64_t>(out_shape)},
                                  ddout);
       } else {
+        VLOG(4) << "Special case when ddx is not needed and ddy doesn't need "
+                   "to broadcast\n";
         phi::Copy(dev_ctx, *ddy_tensor, dev_ctx.GetPlace(), false, ddout);
       }
     } else if (ddx_tensor != nullptr && ddy_tensor == nullptr) {
       if (ddx_tensor->dims() != out_shape) {
+        VLOG(4) << "Special case when ddy is not needed and ddx need to "
+                   "broadcast\n";
         std::vector<const DenseTensor*> ins = {ddx_tensor};
         std::vector<DenseTensor*> outs = {ddout};
         ExpandKernel<T, Context>(dev_ctx,
@@ -92,6 +99,8 @@ void AddDoubleGradImpl(const Context& dev_ctx,
                                  IntArray{phi::vectorize<int64_t>(out_shape)},
                                  ddout);
       } else {
+        VLOG(4) << "Special case when ddx is not needed and ddy doesn't need "
+                   "to broadcast\n";
         phi::Copy(dev_ctx, *ddx_tensor, dev_ctx.GetPlace(), false, ddout);
       }
     } else {