[all-commits] [llvm/llvm-project] 643819: [VPlan] Introduce m_SelectLike and use to support ...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 64381998961b4b9324ab5a6f6015b285b59d6bb6
      https://github.com/llvm/llvm-project/commit/64381998961b4b9324ab5a6f6015b285b59d6bb6
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2026-06-12 (Fri, 12 Jun 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanConstruction.cpp
    M llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/RISCV/tail-folding-complex-mask.ll
    M llvm/test/Transforms/LoopVectorize/epilog-iv-select-cmp.ll

  Log Message:
  -----------
  [VPlan] Introduce m_SelectLike and use to support 2-operand blends. (#194729)

We should be able to treat 2-operand blends like select by most VPlan
code. Add a new m_SelectLike matcher and use in places that only use the
matcher to extract operands.

Overall this leads to a small number of improvements in RISCV (~10 files
changed in a large IR corpus) and 2 loops changed on AArch64 with
tail-folding forced.


PR: https://github.com/llvm/llvm-project/pull/194729



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