if (VM.VerifyAssertions) VM.assert(VM.NOT_REACHED); return -1;
if (VM.VerifyAssertions) VM._assert(VM.NOT_REACHED); return -1;
   public static int  sysCallSigWait(int ip, int toc, int p0,                                      int p1, VM_Registers r){      if (VM.VerifyAssertions) VM.assert(VM.NOT_REACHED); return -1;    }