#include "caffe2/operators/scale_op.h"

namespace caffe2 {

REGISTER_CPU_OPERATOR(Scale, ScaleOp<float, CPUContext>);
OPERATOR_SCHEMA(Scale)
  .NumInputs(1)
  .NumOutputs(1)
  .AllowInplace({{0, 0}})
  .SetDoc(R"DOC(
Scale takes one input data (Tensor<float>) and produces one output data
(Tensor<float>) whose value is the input data tensor scaled element-wise.
)DOC")
  .Arg("scale", "(float, default 1.0) the scale to apply.");

class GetScaleGradient : public GradientMakerBase {
  using GradientMakerBase::GradientMakerBase;
  vector<OperatorDef> GetGradientDefs() override {
    // CopyArguments is true by default so the "scale" arg is going to be copied
    return SingleGradientDef(
        "Scale", "", vector<string>{GO(0)}, vector<string>{GI(0)});
  }
};
REGISTER_GRADIENT(Scale, GetScaleGradient);
}  // namespace caffe2

#include "caffe2/operators/scale_op.h"

namespace caffe2 {

REGISTER_CPU_OPERATOR(Scale, ScaleOp<float, CPUContext>);
OPERATOR_SCHEMA(Scale)
  .NumInputs(1)
  .NumOutputs(1)
  .AllowInplace({{0, 0}})
  .SetDoc(R"DOC(
Scale takes one input data (Tensor<float>) and produces one output data
(Tensor<float>) whose value is the input data tensor scaled element-wise.
)DOC")
  .Arg("scale", "(float, default 1.0) the scale to apply.");

class GetScaleGradient : public GradientMakerBase {
  using GradientMakerBase::GradientMakerBase;
  vector<OperatorDef> GetGradientDefs() override {
    return SingleGradientDef(
        "Scale", "",
        vector<string>{GO(0)},
        vector<string>{GI(0)},
        Def().arg());
  }
};
REGISTER_GRADIENT(Scale, GetScaleGradient);
}  // namespace caffe2

--- 
+++ 
@@ -16,11 +16,9 @@
 class GetScaleGradient : public GradientMakerBase {
   using GradientMakerBase::GradientMakerBase;
   vector<OperatorDef> GetGradientDefs() override {
+    // CopyArguments is true by default so the "scale" arg is going to be copied
     return SingleGradientDef(
-        "Scale", "",
-        vector<string>{GO(0)},
-        vector<string>{GI(0)},
-        Def().arg());
+        "Scale", "", vector<string>{GO(0)}, vector<string>{GI(0)});
   }
 };
 REGISTER_GRADIENT(Scale, GetScaleGradient);
Fix warning in ScaleOp grad

Summary: #accept2ship

Reviewed By: Yangqing

Differential Revision: D4386362

fbshipit-source-id: 634410e73034ac31b7f2bec39f41c52ea9935e3a
