[all-commits] [llvm/llvm-project] e74d83: [X86] combineConcatVectorOps - concat mixed v2f64/...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e74d834cb155a894fa0f9dbd1483b7fef53a79ae
      https://github.com/llvm/llvm-project/commit/e74d834cb155a894fa0f9dbd1483b7fef53a79ae
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-06-10 (Tue, 10 Jun 2025)

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

  Log Message:
  -----------
  [X86] combineConcatVectorOps - concat mixed v2f64/v4f64 faux shuffles into v4f64/v8f64 vshufpd (#143521)

Replace getTargetShuffleMask call (only permitted for target shuffles)
and use getTargetShuffleInputs instead to match various faux shuffles
(insert+extract sequences in particular).

This does mean we have to explicitly bail out with undef/zero mask
elements, where before getTargetShuffleMask would handle them.



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