fix overflow by int32 mul test=develop (#16794)

* fix overflow by int32 mul test=develop

* fix reference nullptr

* fix codestyle test=develop

* modify to point in ContextProjectFunctor test=develop

* modify to point in ContextProjectFunctor test=develop

* modify . to -> test=develop

paddle/fluid/operators/math/context_project.h

@@ -87,7 +87,7 @@ template <typename DeviceContext, typename T>
 class ContextProjectFunctor {
  public:
   void operator()(const DeviceContext& context, const LoDTensor& in,
-                  const Tensor& padding_data, bool padding_trainable,
+                  const Tensor* padding_data, bool padding_trainable,
                   const int context_start, const int context_length,
                   const int context_stride, const int up_pad,
                   const int down_pad, Tensor* col) {
@@ -132,6 +132,7 @@ class ContextProjectFunctor {
       }
     }
     if (padding_trainable) {
+      PADDLE_ENFORCE_NOT_NULL(padding_data);
       for (int i = 0; i < static_cast<int>(lod_level_0.size()) - 1; ++i) {
         Tensor out_t = col->Slice(static_cast<int>(lod_level_0[i]),
                                   static_cast<int>(lod_level_0[i + 1]));
@@ -150,7 +151,7 @@ class ContextProjectFunctor {
                 k + context_length < up_pad ? context_length : up_pad - k;
             Tensor out_t_sub = out_t.Slice(k * context_length,
                                            k * context_length + padding_size);
-            Tensor w_sub = padding_data.Slice(k, k + padding_size);
+            Tensor w_sub = padding_data->Slice(k, k + padding_size);
             framework::TensorCopy(w_sub, context.GetPlace(), context,
                                   &out_t_sub);
           }
@@ -180,7 +181,7 @@ class ContextProjectFunctor {
             Tensor out_t_sub = out_t.Slice(
                 (down_pad_begin_row + t) * context_length - padding_size,
                 (down_pad_begin_row + t) * context_length);
-            Tensor w_sub = padding_data.Slice(
+            Tensor w_sub = padding_data->Slice(
                 up_pad + padding_idx, up_pad + padding_idx + padding_size);
             framework::TensorCopy(w_sub, context.GetPlace(), context,
                                   &out_t_sub);

paddle/fluid/operators/sequence_ops/sequence_conv_op.h

@@ -49,7 +49,7 @@ class SequenceConvKernel : public framework::OpKernel<T> {
 
     int up_pad = std::max(0, -context_start);
     int down_pad = std::max(0, context_start + context_length - 1);
-    int sequence_width = static_cast<int>(in->dims()[1]);
+    auto sequence_width = static_cast<int64_t>(in->dims()[1]);
 
     framework::DDim col_shape = {in->dims()[0],
                                  context_length * sequence_width};
@@ -62,7 +62,7 @@ class SequenceConvKernel : public framework::OpKernel<T> {
     set_zero(dev_ctx, &col, static_cast<T>(0));
     math::ContextProjectFunctor<DeviceContext, T> seq_project_functor;
 
-    seq_project_functor(dev_ctx, *in, *padding_data, padding_trainable,
+    seq_project_functor(dev_ctx, *in, padding_data, padding_trainable,
                         context_start, context_length, context_stride, up_pad,
                         down_pad, &col);
 
@@ -93,7 +93,7 @@ class SequenceConvGradKernel : public framework::OpKernel<T> {
 
     int up_pad = std::max(0, -context_start);
     int down_pad = std::max(0, context_start + context_length - 1);
-    int sequence_width = static_cast<int>(in->dims()[1]);
+    auto sequence_width = static_cast<int64_t>(in->dims()[1]);
 
     math::SetConstant<DeviceContext, T> set_zero;
     auto& dev_ctx = context.template device_context<DeviceContext>();
@@ -144,7 +144,7 @@ class SequenceConvGradKernel : public framework::OpKernel<T> {
         padding_data = context.Input<Tensor>("PaddingData");
       }
 
-      seq_project_functor(dev_ctx, *in, *padding_data, padding_trainable,
+      seq_project_functor(dev_ctx, *in, padding_data, padding_trainable,
                           context_start, context_length, context_stride, up_pad,
                           down_pad, &col);