[all-commits] [llvm/llvm-project] 4846f6: [X86][AVX] combineTargetShuffle - simplify the X86...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4846f6ab815c34f6ffbc8d4ecde891d917bf2157
      https://github.com/llvm/llvm-project/commit/4846f6ab815c34f6ffbc8d4ecde891d917bf2157
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-01-22 (Fri, 22 Jan 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp

  Log Message:
  -----------
  [X86][AVX] combineTargetShuffle - simplify the X86ISD::VPERM2X128 subvector matching

Simplify vperm2x128(concat(X,Y),concat(Z,W)) folding.

Use collectConcatOps / ISD::INSERT_SUBVECTOR to find the source subvectors instead of hardcoded immediate matching.


  Commit: c33d36e0667e7fff186243ac7a3a9cd63e797438
      https://github.com/llvm/llvm-project/commit/c33d36e0667e7fff186243ac7a3a9cd63e797438
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-01-22 (Fri, 22 Jan 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/avx-splat.ll
    M llvm/test/CodeGen/X86/extract-concat.ll
    M llvm/test/CodeGen/X86/haddsub-4.ll
    M llvm/test/CodeGen/X86/known-signbits-vector.ll
    M llvm/test/CodeGen/X86/vector-shuffle-256-v4.ll
    M llvm/test/CodeGen/X86/vector-shuffle-256-v8.ll
    M llvm/test/CodeGen/X86/vector-shuffle-combining.ll

  Log Message:
  -----------
  [X86][AVX] canonicalizeLaneShuffleWithRepeatedOps - handle unary vperm2x128(permute/shift(x,c),undef) cases

Fold vperm2x128(permute/shift(x,c),undef) -> permute/shift(vperm2x128(x,undef),c)


Compare: https://github.com/llvm/llvm-project/compare/02e174e8f77f...c33d36e0667e