Fix some inssues

paddle/operators/clip_op.h

@@ -47,10 +47,7 @@ class ClipGradFunctor {
  public:
   explicit ClipGradFunctor(const T min, const T max) : min_(min), max_(max) {}
   HOSTDEVICE T operator()(const T& x, const T& y) const {
-    if (y > min_ && y < max_)
-      return x;
-    else
-      return 0;
+    return (y > min_ && y < max_) ? x : 0;
   }
 
  private:
@@ -68,7 +65,7 @@ class ClipKernel : public framework::OpKernel {
     auto* out = context.Output<Tensor>("Out");
     T* out_data = out->mutable_data<T>(context.GetPlace());
     const T* x_data = x->data<T>();
-    int numel = x->numel();
+    int64_t numel = x->numel();
     Transform<Place> trans;
     trans(context.device_context(), x_data, x_data + numel, out_data,
           ClipFunctor<T>(min, max));