[PATCH] CodeGen: Devirtualize member calls on classes that are provably final.

[Benjamin Kramer]

  I'm withdrawing this patch, it has some fundamental issues that have to be fixed first.

  - As John pointed out it deserializes all precompiled headers that may be used in the TU. That's not acceptable.

  - It is severely limited by just optimizing functions whose emission is deferred. This works well for the test case but doesn't handle many other cases.

http://llvm-reviews.chandlerc.com/D1511