[all-commits] [llvm/llvm-project] bb91b4: [X86] Handle repeated blend mask in combineConcatV...

[XinWang10 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bb91b4371975f6aa48ade88076c400ca8c2c0043
      https://github.com/llvm/llvm-project/commit/bb91b4371975f6aa48ade88076c400ca8c2c0043
  Author: XinWang10 <108658776+XinWang10 at users.noreply.github.com>
  Date:   2024-02-19 (Mon, 19 Feb 2024)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-8.ll

  Log Message:
  -----------
  [X86] Handle repeated blend mask in combineConcatVectorOps (#82155)

https://github.com/llvm/llvm-project/commit/1d27669e8ad07f8f2 add
support for fold 512-bit concat(blendi(x,y,c0),blendi(z,w,c1)) to
AVX512BW mask select.
But when the type of subvector is v16i16, we need to generate repeated
mask to make the result correct.
The subnode looks like t87: v16i16 = X86ISD::BLENDI t132, t58,
TargetConstant:i8<-86>.



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