[all-commits] [llvm/llvm-project] 1ec825: [X86] Add initial support for ISD::CLMUL vXi32/vXi...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1ec82570225aed6fecc61c9df2dd2760e0bce8a8
      https://github.com/llvm/llvm-project/commit/1ec82570225aed6fecc61c9df2dd2760e0bce8a8
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2026-01-19 (Mon, 19 Jan 2026)

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

  Log Message:
  -----------
  [X86] Add initial support for ISD::CLMUL vXi32/vXi64 custom lowering (#176759)

These will be quicker if they are "scalarized" to use PCLMULQDQ and then
packed back together instead of the default expansion - 256-bit/512-bit
support will follow shortly.

vXi8/vXi16 look like they will be quicker without PCLMULQDQ, assuming we
can avoid so many multiplies after #176356 has landed.



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