[PATCH] D112872: [SCEV] Remove invalid SCEVUnknowns from value map

[Nikita Popov via Phabricator via llvm-commits]

nikic created this revision.
nikic added reviewers: reames, mkazantsev.
Herald added subscribers: javed.absar, hiraditya.
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When invalidating a SCEVUnknown via CallbackVH, also drop all references to the SCEVUnknown or SCEV expressions using it from the ValueToExpr map. This means we no longer need to check for validity in getExistingSCEV().


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D112872

Files:
  llvm/include/llvm/Analysis/ScalarEvolution.h
  llvm/lib/Analysis/ScalarEvolution.cpp

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