IDE with advanced code analysis?

/prog/, what's the IDE with the most advanced code analysis features out there? I'm talking about things like:

- listing all the free variables that occur in selected code term
- warning the user when he shadows a binding from the outer scope
- finding all the places where a variable gets mutated
- showing all possible execution paths through a code term

inefficient algorithms, which ISN'T BLOAT, you utter dipshit.

They and bloat are in the same general category of unoptimized binaries. The ideal is to have a small binary, which executes quickly, and doesn't use more memory than necessary.