[all-commits] [llvm/llvm-project] 71e39e: [ADT] Add APInt::isNegatedPowerOf2() helper

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 71e39e3f1867032a2fc0c19fa8d4881b39fc5a49
      https://github.com/llvm/llvm-project/commit/71e39e3f1867032a2fc0c19fa8d4881b39fc5a49
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-10-19 (Tue, 19 Oct 2021)

  Changed paths:
    M llvm/include/llvm/ADT/APInt.h
    M llvm/include/llvm/IR/PatternMatch.h
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/lib/Target/AArch64/AArch64FastISel.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
    M llvm/lib/Target/PowerPC/PPCISelLowering.cpp
    M llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
    M llvm/lib/Transforms/Scalar/StraightLineStrengthReduce.cpp
    M llvm/unittests/ADT/APIntTest.cpp

  Log Message:
  -----------
  [ADT] Add APInt::isNegatedPowerOf2() helper

Inspired by D111968, provide a isNegatedPowerOf2() wrapper instead of obfuscating code with (-Value).isPowerOf2() patterns, which I'm sure are likely avenues for typos.....

Differential Revision: https://reviews.llvm.org/D111998