[all-commits] [llvm/llvm-project] ab6677: [LICM] Only set AA metadata on hoisted load if it ...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ab6677e7d64b4612d6c92877cb1d529f922268d2
      https://github.com/llvm/llvm-project/commit/ab6677e7d64b4612d6c92877cb1d529f922268d2
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-11-26 (Tue, 26 Nov 2024)

  Changed paths:
    M llvm/lib/Transforms/Scalar/LICM.cpp
    M llvm/test/Transforms/LICM/hoist-metadata.ll
    M llvm/test/Transforms/LICM/hoisting-preheader-debugloc.ll

  Log Message:
  -----------
  [LICM] Only set AA metadata on hoisted load if it executes. (#117204)

https://github.com/llvm/llvm-project/pull/116220 clarified that
violations of aliasing metadata are UB.

Only set the AA metadata after hoisting a log, if it is guaranteed to
execute in the original loop.

PR: https://github.com/llvm/llvm-project/pull/117204



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