[all-commits] [llvm/llvm-project] 615358: [X86] combineX86ShuffleChainWithExtract - peek thr...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6153582c9c62335ac911bed2b884b13626b99301
      https://github.com/llvm/llvm-project/commit/6153582c9c62335ac911bed2b884b13626b99301
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-09-17 (Tue, 17 Sep 2024)

  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/avx512-shuffles/partial_permute.ll
    M llvm/test/CodeGen/X86/vector-interleaved-load-i8-stride-7.ll
    M llvm/test/CodeGen/X86/zero_extend_vector_inreg_of_broadcast.ll

  Log Message:
  -----------
  [X86] combineX86ShuffleChainWithExtract - peek through insert_subvector(undef,vec,0) widening patterns when tracking subvector sources

Helps replace a number of X86ISD::VPERMV3 nodes that are shuffling subvectors from the same source with X86ISD::VPERMV equivalents.



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