Merged from master still debugging resnet

tools/include/operation.hpp

@@ -25,7 +25,7 @@ struct operation
     /// This is used to compute the resulting shape from an operation. If an
     /// operation cannot be run with input shapes, then it should throw an
     /// exception.
-    shape compute_shape(std::vector<shape> input) const;
+    shape compute_shape(const std::vector<shape>& input) const;
     /**
      * @brief This performs the operation's computation
      *
@@ -37,7 +37,7 @@ struct operation
      * @return Return an `argument` of the result computation. The `shape` of `argument` should be
      * the same the `output` shape.
      */
-    argument compute(context& ctx, shape output, std::vector<argument> input) const;
+    argument compute(context& ctx, const shape& output, const std::vector<argument>& input) const;
     /// An optional stream operator to print the operation. When this is not
     /// implemented, it will just print the operation's name.
     friend std::ostream& operator<<(std::ostream& os, const operation& op);
@@ -56,7 +56,8 @@ auto operator<<(std::ostream& os, const T& x) -> decltype(os << x.name())
 } // namespace operation_stream
 
 template <class T>
-argument compute_op(const T& x, context& ctx, shape output_shape, std::vector<argument> input)
+argument
+compute_op(const T& x, context& ctx, const shape& output_shape, const std::vector<argument>& input)
 {
     return x.compute(auto_any_cast(ctx), output_shape, input);
 }
@@ -64,8 +65,8 @@ argument compute_op(const T& x, context& ctx, shape output_shape, std::vector<ar
 <%
 interface('operation',
     virtual('name', returns='std::string', const=True),
-    virtual('compute_shape', returns='shape', input='std::vector<shape>', const=True),
-    virtual('compute', returns='argument', ctx='context&', output='shape', input='std::vector<argument>', const=True, default='compute_op'),
+    virtual('compute_shape', returns='shape', input='const std::vector<shape>&', const=True),
+    virtual('compute', returns='argument', ctx='context&', output='const shape&', input='const std::vector<argument>&', const=True, default='compute_op'),
     friend('operator<<', returns='std::ostream &', os='std::ostream &', op='const operation &', using='migraph::operation_stream::operator<<')
 )
 %>