[PATCH] D97520: [basicaa] Rewrite isGEPBaseAtNegativeOffset in terms of index difference [NFC]

[Philip Reames via Phabricator via llvm-commits]

reames created this revision.
reames added reviewers: nikic, fhahn.
Herald added subscribers: dantrushin, arphaman, hiraditya, mcrosier.
Herald added a reviewer: bollu.
reames requested review of this revision.
Herald added a project: LLVM.

This should be purely NFC, it just fits more obviously in the flow of the code now that we've standardized on the index different approach.

One subtle point - the placement of this above the BaseAlias check is important in the original code as this can return NoAlias even when we can't find a relation between the bases otherwise.

Also added some enhancement TODOs noticed while understanding the existing code.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D97520

Files:
  llvm/lib/Analysis/BasicAliasAnalysis.cpp

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