[all-commits] [llvm/llvm-project] b98aa6: [X86] LowerABD - lower i8/i16 cases directly to CM...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b98aa6fb1d5f5fa904ce6d789a8fa4a245a90ee6
      https://github.com/llvm/llvm-project/commit/b98aa6fb1d5f5fa904ce6d789a8fa4a245a90ee6
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-09-09 (Mon, 09 Sep 2024)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/abds-neg.ll
    M llvm/test/CodeGen/X86/abds.ll
    M llvm/test/CodeGen/X86/abdu-neg.ll
    M llvm/test/CodeGen/X86/abdu.ll

  Log Message:
  -----------
  [X86] LowerABD - lower i8/i16 cases directly to CMOV(SUB(X,Y),SUB(Y,X)) pattern

Better codegen (shorter dependency chain for better ILP) than via the TRUNC(ABS(SUB(EXT(LHS),EXT(RHS)))) expansion



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