[PATCH] D109457: [SCEV] Use constant range of RHS to prove NUW on narrow IV in trip count logic

[Philip Reames via Phabricator via llvm-commits]

reames updated this revision to Diff 373028.
reames added a comment.

address review comment with better comments, also fixed a bug noticed in the process.  I used max in two places, whereas one of them needed to be a min for the required purpose.

Planning to land the test, then rebase this.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D109457/new/

https://reviews.llvm.org/D109457

Files:
  llvm/lib/Analysis/ScalarEvolution.cpp
  llvm/test/Analysis/ScalarEvolution/trip-count-implied-addrec.ll

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