[all-commits] [llvm/llvm-project] 315896: [X86] Fold SUB(X, SBB(Y, Z, W)) -> SUB(ADC(X, Z, W), Y)

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 315896d3ac8535833c93b990be6cd3df3844bad8
      https://github.com/llvm/llvm-project/commit/315896d3ac8535833c93b990be6cd3df3844bad8
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-03-21 (Mon, 21 Mar 2022)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/add-sub-bool.ll

  Log Message:
  -----------
  [X86] Fold SUB(X,SBB(Y,Z,W)) -> SUB(ADC(X,Z,W),Y)

Prefer the commutable ADC over SBB to improve load folding opportunities