private boolean rangeContainsReserved(int ropRangeStart, int width) {
    for (int i = ropRangeStart; i < (ropRangeStart + width); i++) {
      if (reservedRopRegs.get(i)) {
        return true;
      }
    }
    return false;
  }
Checks to see if any rop registers in the specified range are reserved for local variables or
parameters.

@param ropRangeStart {@code >= 0;} lowest rop register
@param width {@code > 0;} number of rop registers in range.
@return {@code true} if any register in range is marked reserved
android/android_framework/dex-maker/src/main/java/com/android/dx/ssa/back/FirstFitLocalCombiningAllocator.java