if (b.getInfrequent()) return -1;
  final int frequency (OPT_BasicBlock b) {    //-#if BLOCK_COUNTER_WORKS    OPT_Instruction inst = b.firstInstruction();    return  basicBlockCounter.getCount(inst.bcIndex, inst.position);    //-#else    return  ir.HIRInfo.LoopStructureTree.getLoopNestDepth(b);    //-#endif  }