[all-commits] [llvm/llvm-project] 22ba35: [RISCV][SLP] Test for <3 x Ty> reductions which re...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 22ba3511087c85e3b1d4cad686f8d9c3aa6f8088
      https://github.com/llvm/llvm-project/commit/22ba3511087c85e3b1d4cad686f8d9c3aa6f8088
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2024-08-29 (Thu, 29 Aug 2024)

  Changed paths:
    M llvm/test/Transforms/SLPVectorizer/RISCV/vec3-base.ll

  Log Message:
  -----------
  [RISCV][SLP] Test for <3 x Ty> reductions which require reordering

These tests show a vectorizable reduction where the order of the
reduction has been adjusted so that profitable vectorization requires
a reordering of the computation.   We currently have no reordering
in SLP for non-power-of-two vectors, so this doesn't work.

Note that due to reassociation performed in the standard pipeline,
this is actually the canonical form for a reduction reaching SLP.



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