[PATCH] D47951: [SCEV] Look through zero-extends in howFarToZero

[Krzysztof Parzyszek via Phabricator via llvm-commits]

kparzysz updated this revision to Diff 150557.
kparzysz added a comment.

Implemented `stripInjectiveFunctions` (that strips sign- and zero-extensions) and used it in `howFarToZero`.  Added a testcase.


Repository:
  rL LLVM

https://reviews.llvm.org/D47951

Files:
  include/llvm/Analysis/ScalarEvolution.h
  lib/Analysis/ScalarEvolution.cpp
  test/Analysis/ScalarEvolution/strip-injective-zext.ll

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