[all-commits] [llvm/llvm-project] 65e86a: [X86] combineConcatVectorOps - concat(bitcast(), bi...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 65e86a8f3fb44dc09dc2e08526d69e3a57f63995
      https://github.com/llvm/llvm-project/commit/65e86a8f3fb44dc09dc2e08526d69e3a57f63995
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-07-22 (Mon, 22 Jul 2024)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/pmul.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i16-stride-6.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i16-stride-7.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-5.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-6.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-7.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-8.ll
    M llvm/test/CodeGen/X86/widen_bitcnt.ll

  Log Message:
  -----------
  [X86] combineConcatVectorOps - concat(bitcast(),bitcast()) -> bitcast(concat())

When concatenating subvector ops together, try to use the pre-bitcasted subop to help expose further combines.


  Commit: 05671cec6f736c65b7df29234db828116e6d95dd
      https://github.com/llvm/llvm-project/commit/05671cec6f736c65b7df29234db828116e6d95dd
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-07-22 (Mon, 22 Jul 2024)

  Changed paths:
    M llvm/test/CodeGen/X86/combine-pmadd.ll

  Log Message:
  -----------
  [X86] Add tests showing failure to push freeze through SSE PMADD nodes

PMADD guarantee inbounds/saturated ext-multiply-add results

Test to help with regression identified on #84924


  Commit: e9974f02a30280eab868cdab0a90a5372b1799cd
      https://github.com/llvm/llvm-project/commit/e9974f02a30280eab868cdab0a90a5372b1799cd
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-07-22 (Mon, 22 Jul 2024)

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

  Log Message:
  -----------
  [X86] canCreateUndefOrPoisonForTargetNode - PMADDWD/PMADDUBSW nodes don't create poison

Help with regression identified on #84924


Compare: https://github.com/llvm/llvm-project/compare/0284b4b4b603...e9974f02a302

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