if (VM.VerifyAssertions) VM.assert(VM.NOT_REACHED);
if (VM.VerifyAssertions) VM._assert(VM.NOT_REACHED);
  public static void setNextInstructionAddress(VM_Address fp, VM_Address newAddr) {    if (VM.VerifyAssertions) VM.assert(VM.NOT_REACHED);  // call site should have been hijacked by magic in compiler  }  /**   * Get return address for a frame   * @param fp its frame pointer   */  public static VM_Address getReturnAddress(VM_Address fp) {    if (VM.VerifyAssertions) VM.assert(VM.NOT_REACHED);  // call site should have been hijacked by magic in compiler    return null;  }