Created by: luotao1

There are a lot of warning caused by elementwise_op.h:

/home/luotao02/Paddle/paddle/operators/elementwise_op.h(205): warning: function "paddle::framework::OperatorBase::InferShape(const paddle::framework::Scope &) const" is hidden by "paddle::operators::ElementwiseOp::InferShape" -- virtual function override intended?

/home/luotao02/Paddle/paddle/operators/elementwise_op.h(287): warning: function "paddle::framework::OperatorBase::InferShape(const paddle::framework::Scope &) const" is hidden by "paddle::operators::ElementwiseOpGrad::InferShape" -- virtual function override intended?

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