Chandler Carruth eab3b90a14 [PM] Simplify the new PM interface to the loop unroller and expose two ...

factory functions for the two modes the loop unroller is actually used
in in-tree: simplified full-unrolling and the entire thing including
partial unrolling.

I've also wired these up to nice names so you can express both of these
being in a pipeline easily. This is a precursor to actually enabling
these parts of the O2 pipeline.

Differential Revision: https://reviews.llvm.org/D28897

llvm-svn: 293136

2017-01-26 02:13:50 +00:00

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