remove unnecessary constant fill in sequence conv test=kunlun. (#40126)

paddle/fluid/operators/sequence_ops/sequence_conv_op_xpu.cc

@@ -184,9 +184,6 @@ class SequenceConvGradXPUKernel : public framework::OpKernel<T> {
         col_data, paddle::platform::errors::Fatal("XPU memory is not enough"));
 
     if (in_g || filter_g) {
-      int r = xpu::constant<T>(xpu_context, col_data, col_numel, T(0));
-      PADDLE_ENFORCE_XDNN_SUCCESS(r, "constant");
-
       bool trans_a = false;
       bool trans_b = true;
       int m = out_g->dims()[0];
@@ -208,7 +205,7 @@ class SequenceConvGradXPUKernel : public framework::OpKernel<T> {
       const T* data_b = filter->data<T>();
       T* data_c = col_data;
 
-      r = xpu::fc_fusion<T, T, T, int32_t>(
+      int r = xpu::fc_fusion<T, T, T, int32_t>(
           xpu_context, data_a, data_b, data_c, m, n, k, trans_a, trans_b,
           nullptr, nullptr, nullptr, lda, ldb, ldc, alpha, beta, nullptr,
           xpu::Activation_t::LINEAR);
@@ -222,7 +219,6 @@ class SequenceConvGradXPUKernel : public framework::OpKernel<T> {
 
       in_g->mutable_data<T>(context.GetPlace());
       in_g->set_lod(in->lod());
-      xpu::constant<T>(xpu_context, in_g->data<T>(), in_g->numel(), T(0));
 
       int r = xpu::sequence_context_projection_grad<T, int>(
           xpu_context, in_g->data<T>(), col_data, nullptr, lodx, sequence_width,
@@ -232,8 +228,6 @@ class SequenceConvGradXPUKernel : public framework::OpKernel<T> {
 
     if (filter_g) {
       filter_g->mutable_data<T>(context.GetPlace());
-      xpu::constant<T>(xpu_context, filter_g->data<T>(), filter_g->numel(),
-                       T(0));
 
       int r = xpu::sequence_context_projection<T, int>(
           xpu_context, in->data<T>(), col_data, nullptr, lodx, sequence_width,