[all-commits] [llvm/llvm-project] bf5160: [X86] SimplifyDemandedVectorEltsForTargetNode - re...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bf516098fb7c7d428cae03296b92766467f76c9e
      https://github.com/llvm/llvm-project/commit/bf516098fb7c7d428cae03296b92766467f76c9e
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-04-03 (Thu, 03 Apr 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/any_extend_vector_inreg_of_broadcast.ll
    M llvm/test/CodeGen/X86/any_extend_vector_inreg_of_broadcast_from_memory.ll
    M llvm/test/CodeGen/X86/shuffle-vs-trunc-128.ll
    M llvm/test/CodeGen/X86/vector-interleaved-load-i16-stride-5.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i64-stride-5.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i64-stride-6.ll
    M llvm/test/CodeGen/X86/vector-shuffle-combining-avx512bwvl.ll
    M llvm/test/CodeGen/X86/zero_extend_vector_inreg_of_broadcast.ll
    M llvm/test/CodeGen/X86/zero_extend_vector_inreg_of_broadcast_from_memory.ll

  Log Message:
  -----------
  [X86] SimplifyDemandedVectorEltsForTargetNode - reduce the size of VPERMV/VPERMV3 nodes if the upper elements are not demanded (#133923)

With AVX512VL targets, use 128/256-bit VPERMV/VPERMV3 nodes when we only need the lower elements.



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