[all-commits] [llvm/llvm-project] e03d21: [X86] Use bit test instructions to optimize some l...

[Phoebe Wang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e03d216c28dfbda52afe7e1f6606cc5dafb3235e
      https://github.com/llvm/llvm-project/commit/e03d216c28dfbda52afe7e1f6606cc5dafb3235e
  Author: Phoebe Wang <phoebe.wang at intel.com>
  Date:   2022-03-01 (Tue, 01 Mar 2022)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetLowering.h
    M llvm/include/llvm/IR/IntrinsicsX86.td
    M llvm/lib/CodeGen/AtomicExpandPass.cpp
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/lib/Target/X86/X86ISelLowering.h
    M llvm/lib/Target/X86/X86InstrCompiler.td
    M llvm/test/CodeGen/X86/atomic-bit-test.ll

  Log Message:
  -----------
  [X86] Use bit test instructions to optimize some logic atomic operations

This is to match GCC's optimizations: https://gcc.godbolt.org/z/3odh9e7WE

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D120199