[PATCH] D42165: [SCEV] Fix isLoopEntryGuardedByCond usage

[Serguei Katkov via Phabricator via llvm-commits]

skatkov created this revision.
skatkov added reviewers: sanjoy, mkazantsev, anna, dorit.

ScalarEvolution::isKnownPredicate invokes isLoopEntryGuardedByCond without check
that SCEV is available at entry point of the loop. it is incorrect and fixed by patch.


https://reviews.llvm.org/D42165

Files:
  lib/Analysis/ScalarEvolution.cpp
  lib/Transforms/Scalar/InductiveRangeCheckElimination.cpp
  test/Transforms/IndVarSimplify/inner-loop.ll

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