[PATCH] D19553: Unroll pass restructure.

[Evgeny Stupachenko via llvm-commits]

evstupac added a comment.

Thank you for the review and accept.
The patch is important for further improvements.

> could we make some named constant for the number of latch-associated instructions and use it instead of putting '2' everywhere?


That's a good point. I'll add a variable for this. However, generally it is not a constant value. It depends on loop instructions and unroll factor. We could have more recurrences to optimize. Say, "s ^= 1" will become constant for every unroll factor which is multiple of 2. I'm going to address this in one of further patches.


Repository:
  rL LLVM

http://reviews.llvm.org/D19553