Merge pull request #5872 from qingqing01/op_debug

 Fix lstm_op and gru_op in debug mode.

paddle/operators/math/math_function.cu

@@ -297,7 +297,25 @@ void set_constant_with_place<platform::GPUPlace>(
 template struct RowwiseAdd<platform::GPUPlace, float>;
 template struct RowwiseAdd<platform::GPUPlace, double>;
 template struct ColwiseSum<platform::GPUPlace, float>;
-template struct ColwiseSum<platform::GPUPlace, double>;
+// template struct ColwiseSum<platform::GPUPlace, double>;
+// The ColwiseSum<platform::GPUPlace, double> failed in debug mode,
+// and only failed for this case. So reimplemented it.
+template <>
+void ColwiseSum<platform::GPUPlace, double>::operator()(
+    const platform::DeviceContext& context, const framework::Tensor& input,
+    framework::Tensor* vector) {
+  auto in_dims = input.dims();
+  auto size = input.numel() / in_dims[0];
+  PADDLE_ENFORCE_EQ(vector->numel(), size);
+  framework::Tensor one;
+  one.mutable_data<double>({in_dims[0]}, context.GetPlace());
+  SetConstant<platform::GPUPlace, double> set;
+  set(context, &one, static_cast<double>(1.0));
+  gemv<platform::GPUPlace, double>(context, true, static_cast<int>(in_dims[0]),
+                                   static_cast<int>(in_dims[1]), 1.0,
+                                   input.data<double>(), one.data<double>(),
+                                   0.0, vector->data<double>());
+}
 
 }  // namespace math
 }  // namespace operators