Code optimization tool

Would it be possible to develop a program that could optimize algorithms, detect design patterns and then rewrite the code? It could propose various optimization strategies and the programmer would decide whether to apply them, for example: Detect a Bubble sort and transform it into a Quick sort or a Merge sort Replace unnecessary repetitions of instances of a class into a Singleton Refactor similar functions into a more generic one that accepts parameters This tool could be applicable to the sources of any programming language through configuration files containing the various rules such as grammar