[PATCH] D94088: [SCEV] Assumption context for GetMinTrailingZeros

[Gil Rapaport via Phabricator via llvm-commits]

gilr created this revision.
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Let GetMinTrailingZeros() make better use of assumptions by taking an optional context instruction.
The context defaults to null, keeping the API backward-compatible. If a context is provided, the method will neither use nor update the trailing zeros cache.
The context argument is then used by the loop vectorizer and by SCEV::getSmallConstantTripMultiple() to set the context at their given loop.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D94088

Files:
  llvm/include/llvm/Analysis/ScalarEvolution.h
  llvm/lib/Analysis/ScalarEvolution.cpp
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Transforms/LoopUnroll/runtime-unroll-assume-no-remainder.ll
  llvm/test/Transforms/LoopVectorize/dont-fold-tail-for-assumed-divisible-TC.ll

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