asm.emitLInt (S0,  VM_ObjectModel.getArrayLengthOffset().toInt(), T0);
asm.emitLIntOffset (S0, T0, VM_ObjectModel.getArrayLengthOffset());
  private void genBoundsCheck () {    popInt(T1);      // T1 is array index    popAddr(T0);     // T0 is array ref    asm.emitLInt (S0,  VM_ObjectModel.getArrayLengthOffset().toInt(), T0);  // T2 is array length    asm.emitTWLLE(S0, T1);      // trap if index < 0 or index >= length  }