[all-commits] [llvm/llvm-project] c24fc7: Revert [LICM] Remove unnecessary check during stor...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c24fc7175375b5d32834c2fc4d50e087e2b13369
      https://github.com/llvm/llvm-project/commit/c24fc7175375b5d32834c2fc4d50e087e2b13369
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2026-05-04 (Mon, 04 May 2026)

  Changed paths:
    M llvm/lib/Transforms/Scalar/LICM.cpp
    M llvm/test/Transforms/LICM/call-hoisting.ll
    M llvm/test/Transforms/LICM/hoist-inaccesiblemem-call.ll
    M llvm/test/Transforms/LICM/pr54495.ll
    M llvm/test/Transforms/LICM/store-hoisting.ll

  Log Message:
  -----------
  Revert [LICM] Remove unnecessary check during store hoisting (#195606)

This check is needed after all, to handle the case where the load
aliases only on the first iteration. Even with correct cross-iteration
handling in MSSA, it's legal to return an out of loop clobbering memory
accesses in this case.

Reverts https://github.com/llvm/llvm-project/pull/187529.
Fixes https://github.com/llvm/llvm-project/issues/195513.



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