[all-commits] [llvm/llvm-project] e4b640: [X86] combineKSHIFT - fold kshift(logicop(X, C1), C2...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e4b6407e06ef4326339d4d8970e46cf36ef925f4
      https://github.com/llvm/llvm-project/commit/e4b6407e06ef4326339d4d8970e46cf36ef925f4
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2026-04-28 (Tue, 28 Apr 2026)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/avx512-ext.ll
    M llvm/test/CodeGen/X86/avx512-insert-extract.ll
    M llvm/test/CodeGen/X86/avx512-mask-op.ll
    M llvm/test/CodeGen/X86/masked_store.ll
    M llvm/test/CodeGen/X86/vector-replicaton-i1-mask.ll

  Log Message:
  -----------
  [X86] combineKSHIFT - fold kshift(logicop(X,C1),C2) -> logicop(kshift(X,C2),kshift(C1,C2)) (#194343)

Attempt to push KSHIFTs up through logicops in the DAG to expose additional folding

Requires us to add constant folding handling for KSHIFTL/R instructions as well

Yak shaving for #193700



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