[PATCH] D50033: Introduce DebugCounter into DevRemPairs pass

[Zhizhou Yang via Phabricator via llvm-commits]

zhizhouy created this revision.
zhizhouy added a reviewer: george.burgess.iv.

This patch introduces DebugCounter into DevRemPairs pass at per-transformation level.

It will provide an option skip first `n` or stop after `n` transformations for the whole DevRemPair pass.

This will make debug easier for the pass, also providing chance to do transformation level bisecting.


Repository:
  rL LLVM

https://reviews.llvm.org/D50033

Files:
  lib/Transforms/Scalar/DivRemPairs.cpp
  test/Other/debugcounter-divrempairs.ll

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