[PATCH] D34144: [CodeGen] Add generic MacroFusion pass.

[Evandro Menezes via Phabricator via llvm-commits]

evandro added reviewers: atrick, MatzeB.
evandro added a subscriber: atrick.
evandro added a comment.

This patch looks fine to me, but @atrick felt that `MacroFusion` should belong to the target.


https://reviews.llvm.org/D34144