[PATCH] D104761: [POC] SCEV w/o pointer subtraction

[Philip Reames via Phabricator via llvm-commits]

reames created this revision.
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This isn't a real patch, it's simply a POC of what SCEV without pointer subtraction might look like.  This is triggered by discussion on D104498 <https://reviews.llvm.org/D104498>.

This "mostly doesn't crash", but has huge perf impact.  Running make check shows the impact of not being able to query the difference between two pointers.


https://reviews.llvm.org/D104761

Files:
  llvm/lib/Analysis/Delinearization.cpp
  llvm/lib/Analysis/LoopAccessAnalysis.cpp
  llvm/lib/Analysis/ScalarEvolution.cpp
  llvm/lib/Transforms/Scalar/LoopRerollPass.cpp
  llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp

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