llvm/lib/Transforms/Vectorize/SandboxVectorizer/VecUtils.cpp

//===- VecUtils.cpp -------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "llvm/Transforms/Vectorize/SandboxVectorizer/VecUtils.h"

namespace llvm::sandboxir {

unsigned VecUtils::getFloorPowerOf2(unsigned Num) {
  if (Num == 0)
    return Num;
  unsigned Mask = Num;
  Mask >>= 1;
  for (unsigned ShiftBy = 1; ShiftBy < sizeof(Num) * 8; ShiftBy <<= 1)
    Mask |= Mask >> ShiftBy;
  return Num & ~Mask;
}

#ifndef NDEBUG
template <typename T> static void dumpImpl(ArrayRef<T *> Bndl) {
  for (auto [Idx, V] : enumerate(Bndl))
    dbgs() << Idx << "." << *V << "\n";
}
void VecUtils::dump(ArrayRef<Value *> Bndl) { dumpImpl(Bndl); }
void VecUtils::dump(ArrayRef<Instruction *> Bndl) { dumpImpl(Bndl); }
#endif // NDEBUG

} // namespace llvm::sandboxir