Use non-const ref

src/include/migraphx/instruction.hpp

@@ -24,7 +24,7 @@ struct instruction
 
     instruction(literal l);
 
-    void replace(const operation& o);
+    void replace(operation o);
 
     void recompute_shape();
 

src/instruction.cpp

@@ -28,7 +28,7 @@ void instruction::replace(const shape& r)
     }
 }
 
-void instruction::replace(const operation& o)
+void instruction::replace(operation o)
 {
     op = std::move(o);
     recompute_shape();