Method find_first

ext/include/llvm/ADT/SparseBitVector.h:779–784

Return the first set bit in the bitmap. Return -1 if no bits are set.

  // Return the first set bit in the bitmap.  Return -1 if no bits are set.
  int find_first() const {
    if (Elements.empty())
      return -1;
    const SparseBitVectorElement<ElementSize> &First = *(Elements.begin());
    return (First.index() * ElementSize) + First.find_first();
  }

  // Return the last set bit in the bitmap.  Return -1 if no bits are set.
  int find_last() const {