[all-commits] [llvm/llvm-project] bfd8f7: [X86] SimplifyDemandedVectorEltsForTargetNode - re...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bfd8f7ee4a85ae8873db14fa6e7e31223a1df169
      https://github.com/llvm/llvm-project/commit/bfd8f7ee4a85ae8873db14fa6e7e31223a1df169
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-09-24 (Tue, 24 Sep 2024)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/extractelement-fp.ll

  Log Message:
  -----------
  [X86] SimplifyDemandedVectorEltsForTargetNode - reduce vector width of FRSQRT/FRCP ymm nodes.

If we only demand the lower subvector of a FRSQRT/FRCP node, then reduce the width of the instruction.



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