PM: Implement a basic loop pass manager

Description

PM: Implement a basic loop pass manager

This creates the new-style LoopPassManager and wires it up with dummy
and print passes.

This version doesn't support modifying the loop nest at all. It will
be far easier to discuss and evaluate the approaches to that with this
in place so that the boilerplate is out of the way.

Details

Committed
bognerFeb 24 2016, 11:23 PM
Parents
rL261830: Remove old GSOC projects.
Branches
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