[PATCH] D89381: [SCEV] Re-enable "Use nw flag and symbolic iteration count to sharpen ranges of AddRecs", attempt 3

[Max Kazantsev via Phabricator via llvm-commits]

mkazantsev added a comment.

This patch alone does not give any improvements itself. However, it's an important enabling step for fighting incomplete IV widening, which is a source of performance problems in many various cases, mostly with decrementing loops. I only ran Java benchmarks and see up to 30% boosts in some cases.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D89381/new/

https://reviews.llvm.org/D89381