[all-commits] [llvm/llvm-project] 8ae0e1: [X86] Create X86ISD::SHUF128 512-bit masks with ge...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8ae0e1f58d151daaa9fed5ce70497984a368ad3c
      https://github.com/llvm/llvm-project/commit/8ae0e1f58d151daaa9fed5ce70497984a368ad3c
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2023-08-09 (Wed, 09 Aug 2023)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-interleaved-load-i64-stride-7.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i32-stride-6.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i64-stride-7.ll
    M llvm/test/CodeGen/X86/vector-shuffle-512-v16.ll
    M llvm/test/CodeGen/X86/vector-shuffle-512-v8.ll
    M llvm/test/CodeGen/X86/vector-shuffle-v1.ll

  Log Message:
  -----------
  [X86] Create X86ISD::SHUF128 512-bit masks with getV4X86ShuffleImm8ForMask

This allows us to use the same canonicalizations as PSHUFD/SHUFPS etc. to avoid unnecessary demanded elts (better splat detection, blend pass through etc.) instead of defaulting to zero mask values.