diff --git a/paddle/fluid/framework/operator.cc b/paddle/fluid/framework/operator.cc
index 807667e68464c3be015b72786c8bc55a9223b064..7d5a6198a03c002e182617204686a37b3d7c6db1 100644
--- a/paddle/fluid/framework/operator.cc
+++ b/paddle/fluid/framework/operator.cc
@@ -143,14 +143,12 @@ RuntimeContext::RuntimeContext(const VariableNameMap& innames,
   for (auto& var_name_item : innames) {
     std::vector<Variable*>& input_vars = inputs[var_name_item.first];
     for (auto& var_name : var_name_item.second) {
-      LOG(ERROR) << "first in " << var_name_item.first << ":" << var_name;
       input_vars.push_back(scope.FindVar(var_name));
     }
   }
   for (auto& var_name_item : outnames) {
     std::vector<Variable*>& output_vars = outputs[var_name_item.first];
     for (auto& var_name : var_name_item.second) {
-      LOG(ERROR) << "first out " << var_name_item.first << ":" << var_name;
       output_vars.push_back(scope.FindVar(var_name));
     }
   }
@@ -441,22 +439,13 @@ const Variable* ExecutionContext::InputVar(const std::string& name) const {
   return it->second.empty() ? nullptr : it->second[0];
 }
 
-Variable* ExecutionContext::OutputVar(const std::string& name) const {
-  auto opt = op_.Output(name);
-  return opt == kEmptyVarName ? nullptr : scope_.FindVar(opt);
-}
-
-const Variable* ExecutionContext::FastInputVar(const std::string& name) const {
-  auto it = ctx_.inputs.find(name);
-  if (it == ctx_.inputs.end()) return nullptr;
-
-  PADDLE_ENFORCE_LE(it->second.size(), 1UL,
-                    "Operator %s's input %s should contain only one variable.",
-                    op_.Type(), name);
-  return it->second.empty() ? nullptr : it->second[0];
+const Variable* ExecutionContext::LegacyInputVar(
+    const std::string& name) const {
+  auto ipt = op_.Input(name);
+  return ipt == kEmptyVarName ? nullptr : scope_.FindVar(ipt);
 }
 
-Variable* ExecutionContext::FastOutputVar(const std::string& name) const {
+Variable* ExecutionContext::OutputVar(const std::string& name) const {
   auto it = ctx_.outputs.find(name);
   if (it == ctx_.outputs.end()) return nullptr;
 
@@ -466,15 +455,20 @@ Variable* ExecutionContext::FastOutputVar(const std::string& name) const {
   return it->second.empty() ? nullptr : it->second[0];
 }
 
+Variable* ExecutionContext::LegacyOutputVar(const std::string& name) const {
+  auto opt = op_.Output(name);
+  return opt == kEmptyVarName ? nullptr : scope_.FindVar(opt);
+}
+
 template <>
 const Tensor* ExecutionContext::Input<Tensor>(const std::string& name) const {
   return Input<LoDTensor>(name);
 }
 
 template <>
-const Tensor* ExecutionContext::FastInput<Tensor>(
+const Tensor* ExecutionContext::LegacyInput<Tensor>(
     const std::string& name) const {
-  return FastInput<LoDTensor>(name);
+  return LegacyInput<LoDTensor>(name);
 }
 
 template <>
@@ -502,8 +496,8 @@ Tensor* ExecutionContext::Output<Tensor>(const std::string& name) const {
 }
 
 template <>
-Tensor* ExecutionContext::FastOutput<Tensor>(const std::string& name) const {
-  return FastOutput<LoDTensor>(name);
+Tensor* ExecutionContext::LegacyOutput<Tensor>(const std::string& name) const {
+  return LegacyOutput<LoDTensor>(name);
 }
 
 template <>
@@ -870,7 +864,6 @@ Scope* OperatorWithKernel::PrepareData(
       auto& var_name = var_name_item.second[i];
       auto* var = scope.FindVar(var_name);
       input_vars[i] = var;
-      LOG(ERROR) << "second in " << var_name_item.first << ":" << var_name;
 
       // Only tensor can be tranfer to another device.
       if (var == nullptr || !VarIsTensor(*var)) {
@@ -931,7 +924,6 @@ Scope* OperatorWithKernel::PrepareData(
     for (size_t i = 0; i < var_name_item.second.size(); ++i) {
       auto& var_name = var_name_item.second[i];
       output_vars[i] = scope.FindVar(var_name);
-      LOG(ERROR) << "second out " << var_name_item.first << ":" << var_name;
     }
   }
 
diff --git a/paddle/fluid/framework/operator.h b/paddle/fluid/framework/operator.h
index 0aad91dbeef9c3b78b69ac314c0824bc253eade2..39190d07b4ccdd5ffd03e2d50bb0e577ac00af75 100644
--- a/paddle/fluid/framework/operator.h
+++ b/paddle/fluid/framework/operator.h
@@ -233,20 +233,20 @@ class ExecutionContext {
   }
 
   template <typename T>
-  const T* FastInput(const std::string& name) const {
-    auto* var = FastInputVar(name);
+  const T* LegacyInput(const std::string& name) const {
+    auto* var = LegacyInputVar(name);
     return var == nullptr ? nullptr : &var->Get<T>();
   }
 
   template <typename T>
-  T* FastOutput(const std::string& name) const {
-    auto var = FastOutputVar(name);
+  T* LegacyOutput(const std::string& name) const {
+    auto var = LegacyOutputVar(name);
     return var == nullptr ? nullptr : var->GetMutable<T>();
   }
 
-  const Variable* FastInputVar(const std::string& name) const;
+  const Variable* LegacyInputVar(const std::string& name) const;
 
-  Variable* FastOutputVar(const std::string& name) const;
+  Variable* LegacyOutputVar(const std::string& name) const;
 
   template <typename T>
   const std::vector<const T*> MultiInput(const std::string& name) const {
@@ -314,7 +314,7 @@ template <>
 const Tensor* ExecutionContext::Input<Tensor>(const std::string& name) const;
 
 template <>
-const Tensor* ExecutionContext::FastInput<Tensor>(
+const Tensor* ExecutionContext::LegacyInput<Tensor>(
     const std::string& name) const;
 
 template <>
@@ -325,7 +325,7 @@ template <>
 Tensor* ExecutionContext::Output<Tensor>(const std::string& name) const;
 
 template <>
-Tensor* ExecutionContext::FastOutput<Tensor>(const std::string& name) const;
+Tensor* ExecutionContext::LegacyOutput<Tensor>(const std::string& name) const;
 
 template <>
 std::vector<Tensor*> ExecutionContext::MultiOutput<Tensor>(
diff --git a/paddle/fluid/operators/prelu_op.cc b/paddle/fluid/operators/prelu_op.cc
index b6155ed3dd4de4e775e26b06839f6961ddb97a7e..62c55c4f5578ac6e620c0a4ac7846a14209dd2a1 100644
--- a/paddle/fluid/operators/prelu_op.cc
+++ b/paddle/fluid/operators/prelu_op.cc
@@ -56,7 +56,7 @@ class PReluOp : public framework::OperatorWithKernel {
  protected:
   framework::OpKernelType GetExpectedKernelType(
       const framework::ExecutionContext &ctx) const override {
-    return framework::OpKernelType(ctx.FastInput<Tensor>("X")->type(),
+    return framework::OpKernelType(ctx.Input<Tensor>("X")->type(),
                                    ctx.device_context());
   }
 };