[all-commits] [llvm/llvm-project] 05f987: [X86] Add handling for shift_logical(select(icmp_u...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 05f987743170cbd9fc97699c7a9b352055de7300
      https://github.com/llvm/llvm-project/commit/05f987743170cbd9fc97699c7a9b352055de7300
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-07-12 (Fri, 12 Jul 2024)

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

  Log Message:
  -----------
  [X86] Add handling for shift_logical(select(icmp_uge(amt,BW),0,x),amt) -> avx2 shift(x,amt)

We need to catch this otherwise pre-AVX512 targets will fold this to shift_logical(and(icmp_ult(amt,BW),x),amt)



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