[all-commits] [llvm/llvm-project] 74f69c: [X86] SimplifyDemandedVectorEltsForTargetNode - re...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 74f69c49fed894ba26b6174783e4c650d50344c5
      https://github.com/llvm/llvm-project/commit/74f69c49fed894ba26b6174783e4c650d50344c5
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-04-09 (Wed, 09 Apr 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-shuffle-512-v16.ll

  Log Message:
  -----------
  [X86] SimplifyDemandedVectorEltsForTargetNode - reduce the size of VPERMV v16f32/v16i32 nodes if the upper elements are not demanded (#134890)

Missed in #133923 - even without AVX512VL, we can replace VPERMV v16f32/v16i32 nodes with the AVX2 v8f32/v8i32 equivalents.



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