[all-commits] [llvm/llvm-project] ab17ed: [X86] Don't fold AND(SRL(X, Y), 1) -> SETCC(BT(X, Y))...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ab17ed0723fc715c752a71e59d3cef03cafcb68f
      https://github.com/llvm/llvm-project/commit/ab17ed0723fc715c752a71e59d3cef03cafcb68f
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-04-28 (Thu, 28 Apr 2022)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/setcc.ll

  Log Message:
  -----------
  [X86] Don't fold AND(SRL(X,Y),1) -> SETCC(BT(X,Y)) on BMI2 targets

With BMI2 we have SHRX which is a lot quicker than regular x86 shifts.

Fixes #55138