Move `Registrar`s into Touch functions

paddle/framework/op_registry.h

@@ -307,10 +307,7 @@ class OpRegistry {
   }
 };
 
-class Registrar {
- public:
-  void Touch() {}
-};
+class Registrar {};
 
 template <typename OpType, typename ProtoMakerType>
 class OpRegistrar : public Registrar {
@@ -354,40 +351,37 @@ class OpKernelRegistrar : public Registrar {
 #define REGISTER_OP(op_type, op_class, op_maker_class)                        \
   STATIC_ASSERT_GLOBAL_NAMESPACE(                                             \
       __reg_op__##op_type, "REGISTER_OP must be called in global namespace"); \
-  static ::paddle::framework::OpRegistrar<op_class, op_maker_class>           \
-      __op_registrar_##op_type##__(#op_type);                                 \
   int TouchOpRegistrar_##op_type() {                                          \
-    __op_registrar_##op_type##__.Touch();                                     \
+    static ::paddle::framework::OpRegistrar<op_class, op_maker_class>         \
+        __op_registrar_##op_type##__(#op_type);                               \
     return 0;                                                                 \
   }
 
 /**
  * Macro to Register Gradient Operator.
  */
-#define REGISTER_GRADIENT_OP(op_type, grad_op_type, grad_op_class)           \
-  STATIC_ASSERT_GLOBAL_NAMESPACE(                                            \
-      __reg_gradient_op__##op_type##_##grad_op_type,                         \
-      "REGISTER_GRADIENT_OP must be called in global namespace");            \
-  static ::paddle::framework::GradOpRegistrar<grad_op_class>                 \
-      __op_gradient_registrar_##op_type##_##grad_op_type##__(#op_type,       \
-                                                             #grad_op_type); \
-  int TouchOpGradientRegistrar_##op_type() {                                 \
-    __op_gradient_registrar_##op_type##_##grad_op_type##__.Touch();          \
-    return 0;                                                                \
+#define REGISTER_GRADIENT_OP(op_type, grad_op_type, grad_op_class)             \
+  STATIC_ASSERT_GLOBAL_NAMESPACE(                                              \
+      __reg_gradient_op__##op_type##_##grad_op_type,                           \
+      "REGISTER_GRADIENT_OP must be called in global namespace");              \
+  int TouchOpGradientRegistrar_##op_type() {                                   \
+    static ::paddle::framework::GradOpRegistrar<grad_op_class>                 \
+        __op_gradient_registrar_##op_type##_##grad_op_type##__(#op_type,       \
+                                                               #grad_op_type); \
+    return 0;                                                                  \
   }
 
 /**
  * Macro to Register OperatorKernel.
  */
-#define REGISTER_OP_KERNEL(op_type, DEVICE_TYPE, place_class, ...)        \
-  STATIC_ASSERT_GLOBAL_NAMESPACE(                                         \
-      __reg_op_kernel_##op_type##_##DEVICE_TYPE##__,                      \
-      "REGISTER_OP_KERNEL must be called in global namespace");           \
-  static ::paddle::framework::OpKernelRegistrar<place_class, __VA_ARGS__> \
-      __op_kernel_registrar_##op_type##_##DEVICE_TYPE##__(#op_type);      \
-  int TouchOpKernelRegistrar_##op_type##_##DEVICE_TYPE() {                \
-    __op_kernel_registrar_##op_type##_##DEVICE_TYPE##__.Touch();          \
-    return 0;                                                             \
+#define REGISTER_OP_KERNEL(op_type, DEVICE_TYPE, place_class, ...)          \
+  STATIC_ASSERT_GLOBAL_NAMESPACE(                                           \
+      __reg_op_kernel_##op_type##_##DEVICE_TYPE##__,                        \
+      "REGISTER_OP_KERNEL must be called in global namespace");             \
+  int TouchOpKernelRegistrar_##op_type##_##DEVICE_TYPE() {                  \
+    static ::paddle::framework::OpKernelRegistrar<place_class, __VA_ARGS__> \
+        __op_kernel_registrar_##op_type##_##DEVICE_TYPE##__(#op_type);      \
+    return 0;                                                               \
   }
 
 /**