simplify shape inference code

paddle/framework/op_desc.cc

@@ -39,10 +39,6 @@ class CompileTimeInferShapeContext : public InferShapeContext {
 
   bool HasOutputs(const std::string &name) const override;
 
-  DDim GetInputDim(const std::string &name) const override;
-
-  void SetOutputDim(const std::string &name, const DDim &dim) override;
-
   AttrReader Attrs() const override;
 
   const std::vector<std::string> &Inputs(
@@ -444,21 +440,6 @@ bool CompileTimeInferShapeContext::HasOutputs(const std::string &name) const {
   return true;
 }
 
-DDim CompileTimeInferShapeContext::GetInputDim(const std::string &name) const {
-  std::vector<DDim> ddims = GetInputsDim(name);
-  auto length = ddims.size();
-  PADDLE_ENFORCE_EQ(length, 1UL,
-                    "Input(%s) should have 1 value, "
-                    "but it has %d now",
-                    name, length);
-  return ddims[0];
-}
-
-void CompileTimeInferShapeContext::SetOutputDim(const std::string &name,
-                                                const DDim &dim) {
-  SetOutputsDim(name, {dim});
-}
-
 AttrReader CompileTimeInferShapeContext::Attrs() const {
   return AttrReader(op_.GetAttrMap());
 }

paddle/framework/operator.cc

@@ -366,14 +366,6 @@ class RuntimeInferShapeContext : public InferShapeContext {
     return true;
   }
 
-  DDim GetInputDim(const std::string& name) const override {
-    return GetDim(op_.Input(name));
-  }
-
-  void SetOutputDim(const std::string& name, const DDim& dim) override {
-    SetDim(op_.Output(name), dim);
-  }
-
   AttrReader Attrs() const override { return AttrReader(op_.Attrs()); }
 
   const std::vector<std::string>& Inputs(

paddle/framework/shape_inference.cc

@@ -18,10 +18,18 @@ limitations under the License. */
 namespace paddle {
 namespace framework {
 
+framework::DDim InferShapeContext::GetInputDim(const std::string &name) const {
+  const std::vector<std::string> &arg_names = Inputs(name);
+  PADDLE_ENFORCE_EQ(arg_names.size(), 1UL,
+                    "Input(%s) shoudl holds one element, but now it holds %d",
+                    name, arg_names.size());
+  return this->GetDim(arg_names[0]);
+}
+
 std::vector<framework::DDim> InferShapeContext::GetInputsDim(
     const std::string &name) const {
-  const std::vector<std::string> &names = Inputs(name);
-  return GetDims(names);
+  const std::vector<std::string> &arg_names = Inputs(name);
+  return GetDims(arg_names);
 }
 
 DDim InferShapeContext::GetInputsElementDim(const std::string &name,
@@ -30,13 +38,21 @@ DDim InferShapeContext::GetInputsElementDim(const std::string &name,
   return this->GetDim(names[idx]);
 }
 
+void InferShapeContext::SetOutputDim(const std::string &name, const DDim &dim) {
+  auto &arg_names = Outputs(name);
+  PADDLE_ENFORCE_EQ(arg_names.size(), 1UL,
+                    "Output(%s) shoudl holds one element, but now it holds %d",
+                    name, arg_names.size());
+  SetDim(arg_names[0], dim);
+}
+
 void InferShapeContext::SetOutputsDim(
     const std::string &name, const std::vector<framework::DDim> &dims) {
   auto &names = Outputs(name);
   SetDims(names, dims);
 }
 
-std::vector<framework::DDim> InferShapeContext::GetDims(
+std::vector<DDim> InferShapeContext::GetDims(
     const std::vector<std::string> &names) const {
   std::vector<framework::DDim> ret;
   ret.reserve(names.size());
@@ -45,7 +61,6 @@ std::vector<framework::DDim> InferShapeContext::GetDims(
       [this](const std::string &name) { return this->GetDim(name); });
   return ret;
 }
-
 void InferShapeContext::SetDims(const std::vector<std::string> &names,
                                 const std::vector<framework::DDim> &dims) {
   size_t length = names.size();

paddle/framework/shape_inference.h

@@ -35,12 +35,12 @@ class InferShapeContext {
   virtual bool HasInputs(const std::string &name) const = 0;
   virtual bool HasOutputs(const std::string &name) const = 0;
 
-  virtual framework::DDim GetInputDim(const std::string &name) const = 0;
+  framework::DDim GetInputDim(const std::string &name) const;
 
   std::vector<framework::DDim> GetInputsDim(const std::string &name) const;
   DDim GetInputsElementDim(const std::string &name, int idx) const;
 
-  virtual void SetOutputDim(const std::string &name, const DDim &dim) = 0;
+  void SetOutputDim(const std::string &name, const DDim &dim);
   void SetOutputsDim(const std::string &name,
                      const std::vector<framework::DDim> &dims);
 
@@ -63,9 +63,7 @@ class InferShapeContext {
   virtual framework::DDim GetDim(const std::string &name) const = 0;
   virtual void SetDim(const std::string &name, const framework::DDim &dim) = 0;
 
-  std::vector<framework::DDim> GetDims(
-      const std::vector<std::string> &names) const;
-
+  std::vector<DDim> GetDims(const std::vector<std::string> &names) const;
   std::vector<proto::VarDesc::VarType> GetVarTypes(
       const std::vector<std::string> &names) const;