[all-commits] [llvm/llvm-project] c80495: [InstCombine] Allow folding cross-lane operations ...

[Benjamin Maxwell via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c80495c1b094dcca0a9933d8af3972393592b066
      https://github.com/llvm/llvm-project/commit/c80495c1b094dcca0a9933d8af3972393592b066
  Author: Benjamin Maxwell <benjamin.maxwell at arm.com>
  Date:   2025-10-23 (Thu, 23 Oct 2025)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
    M llvm/lib/Transforms/InstCombine/InstCombineInternal.h
    M llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
    M llvm/test/Transforms/InstCombine/intrinsic-select.ll
    M llvm/test/Transforms/InstCombine/phi.ll
    M llvm/test/Transforms/InstCombine/select_frexp.ll
    M llvm/test/Transforms/PhaseOrdering/always-inline-alloca-promotion.ll

  Log Message:
  -----------
  [InstCombine] Allow folding cross-lane operations into PHIs/selects (#164388)

Previously, cross-lane operations were disallowed here, but they are
only problematic if the `select` condition is a vector, as the input of
the operation is not simply one of the arms of the phi/select.



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