// Code for  :  x->x() {x->cond()} x->y() ? x->tval() : x->fval()
void LIRGenerator::do_IfOp(IfOp* x) {
#ifdef ASSERT
  {
    ValueTag xtag = x->x()->type()->tag();
    ValueTag ttag = x->tval()->type()->tag();
    assert(xtag == intTag || xtag == objectTag, "cannot handle others");
    assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others");
    assert(ttag == x->fval()->type()->tag(), "cannot handle others");
  }
#endif

  LIRItem left(x->x(), this);
  LIRItem right(x->y(), this);
  left.load_item();
  right.load_item();

  emit()->ifop_phase1(x->cond(), left.result(), right.result());

  LIRItem t_val(x->tval(), this);
  LIRItem f_val(x->fval(), this);
  t_val.dont_load_item();
  f_val.dont_load_item();
  RInfo reg;
  if (x->fval()->type()->tag() == longTag) {
    // must lock before releasing
    reg = rlock_result(x)->rinfo();
  }
  if (x->fval()->type()->tag() != longTag) {
    reg = rlock_result(x)->rinfo();
  }

  emit()->ifop_phase2(reg, t_val.result(), f_val.result(), x->cond());
}
// for  _fadd, _fmul, _fsub, _fdiv, _frem
//      _dadd, _dmul, _dsub, _ddiv, _drem
void LIRGenerator::do_ArithmeticOp_FPU(ArithmeticOp* x) {
  // Because of the way we simulate FPU  register location in code emitter, we must
  // mark both items as being destroyed(i.e., they are going to be removed from the FPU stack)
  LIRItem left(x->x(),  this);
  LIRItem right(x->y(), this);
  right.set_destroys_register();
  left.set_destroys_register();
  LIRItem* left_arg  = &left;
  LIRItem* right_arg = &right;
  if (x->is_commutative() && left.is_stack() && right.is_register()) {
      // swap them if left is real stack (or cached) and right is real register(not cached)
    left_arg = &right;
    right_arg = &left;
  }
  left_arg->load_item();
  // do not need to load right, as we can handle stack and constants
  if ( x->y()->type()->is_constant() || x->op() == Bytecodes::_frem || x->op() == Bytecodes::_drem) {
    // cannot handle inlined constants
    right_arg->load_item();
  } else {
    right_arg->dont_load_item();
  }
  RInfo reg = rlock_result(x)->rinfo();
  emit()->arithmetic_op_fpu(x->op(), x->operand(), left_arg->result(), right_arg->result(), x->is_strictfp());

  round_item(x->operand());
}
void LIRGenerator::do_CheckCast(CheckCast* x) {
  // all values are spilled
  spill_values_on_stack(x->state());
  LIRItem obj(x->obj(), this);
  obj.set_destroys_register();
  CodeEmitInfo* patching_info = NULL;
  if (!x->klass()->is_loaded() || PatchALot) {
    // must do this before locking the destination register as an oop register,
    // and before the obj is loaded (the latter is for deoptimization)
    patching_info = state_for(x, x->state_before());
  }
  obj.load_item();
  RInfo in_reg = obj.result()->rinfo();

  // info for exceptions
  CodeEmitInfo* info_for_exception = state_for(x, x->state()->copy_locks());

  RInfo reg = rlock_result(x)->rinfo();
  RInfo tmp1 = new_register(objectType)->rinfo();
  RInfo tmp2 = new_register(objectType)->rinfo();

  if (patching_info != NULL) {
    patching_info->add_register_oop(in_reg);
  }
  emit()->checkcast_op(LIR_OprFact::rinfo(reg, T_OBJECT), obj.result(), x->klass(), tmp1, tmp2, x->direct_compare(), info_for_exception, patching_info);
}
// _i2l, _i2f, _i2d, _l2i, _l2f, _l2d, _f2i, _f2l, _f2d, _d2i, _d2l, _d2f
// _i2b, _i2c, _i2s
void LIRGenerator::do_Convert(Convert* x) {
  if (x->op() == Bytecodes::_f2i || x->op() == Bytecodes::_d2i) {
    LIRItem value(x->value(), this);
    value.set_destroys_register();
    value.load_item();
    RInfo reg = set_with_result_register(x)->rinfo();

    emit()->convert_op(x->op(), value.result(), reg, is_32bit_mode());
  } else {
    LIRItem value(x->value(), this);
    value.handle_float_kind();
    if (value.is_constant()) {
      value.load_item();
    } else if (x->op() != Bytecodes::_i2f && x->op() != Bytecodes::_i2d && x->op() != Bytecodes::_l2f && x->op() != Bytecodes::_l2d) {
      value.load_item();
    } else {
      value.dont_load_item();
    }
    RInfo reg;
    if (x->op() == Bytecodes::_f2l || x->op() == Bytecodes::_d2l) {
      reg = FrameMap::_eax_edxRInfo;
      set_result(x, reg);
    } else {
      reg = rlock_result(x)->rinfo();
    }

    emit()->convert_op(x->op(), value.result(), reg);
    round_item(x->operand());
  }
}
示例#5
0
void LIRGenerator::do_NewObjectArray(NewObjectArray* x) {
  LIRItem length(x->length(), this);
  // in case of patching (i.e., object class is not yet loaded), we need to reexecute the instruction
  // and therefore provide the state before the parameters have been consumed
  CodeEmitInfo* patching_info = NULL;
  if (!x->klass()->is_loaded() || PatchALot) {
    patching_info =  state_for(x, x->state_before());
  }

  CodeEmitInfo* info = state_for(x, x->state());

  const LIR_Opr reg = result_register_for(x->type());
  LIR_Opr tmp1 = FrameMap::rcx_oop_opr;
  LIR_Opr tmp2 = FrameMap::rsi_oop_opr;
  LIR_Opr tmp3 = FrameMap::rdi_oop_opr;
  LIR_Opr tmp4 = reg;
  LIR_Opr klass_reg = FrameMap::rdx_oop_opr;

  length.load_item_force(FrameMap::rbx_opr);
  LIR_Opr len = length.result();

  CodeStub* slow_path = new NewObjectArrayStub(klass_reg, len, reg, info);
  ciObject* obj = (ciObject*) ciObjArrayKlass::make(x->klass());
  if (obj == ciEnv::unloaded_ciobjarrayklass()) {
    BAILOUT("encountered unloaded_ciobjarrayklass due to out of memory error");
  }
  jobject2reg_with_patching(klass_reg, obj, patching_info);
  __ allocate_array(reg, len, tmp1, tmp2, tmp3, tmp4, T_OBJECT, klass_reg, slow_path);

  LIR_Opr result = rlock_result(x);
  __ move(reg, result);
}
示例#6
0
void LIRGenerator::do_CheckCast(CheckCast* x) {
  LIRItem obj(x->obj(), this);

  CodeEmitInfo* patching_info = NULL;
  if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check())) {
    // must do this before locking the destination register as an oop register,
    // and before the obj is loaded (the latter is for deoptimization)
    patching_info = state_for(x, x->state_before());
  }
  obj.load_item();

  // info for exceptions
  CodeEmitInfo* info_for_exception = state_for(x);

  CodeStub* stub;
  if (x->is_incompatible_class_change_check()) {
    assert(patching_info == NULL, "can't patch this");
    stub = new SimpleExceptionStub(Runtime1::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);
  } else {
    stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception);
  }
  LIR_Opr reg = rlock_result(x);
  LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
  if (!x->klass()->is_loaded() || UseCompressedOops) {
    tmp3 = new_register(objectType);
  }
  __ checkcast(reg, obj.result(), x->klass(),
               new_register(objectType), new_register(objectType), tmp3,
               x->direct_compare(), info_for_exception, patching_info, stub,
               x->profiled_method(), x->profiled_bci());
}
// _ishl, _lshl, _ishr, _lshr, _iushr, _lushr
void LIRGenerator::do_ShiftOp(ShiftOp* x) {
  // count must always be in ecx
  LIRItem value(x->x(), this);
  LIRItem count(x->y(), this);
  value.set_destroys_register();
  ValueTag elemType = x->type()->tag();
  bool must_load_count = !count.is_constant() || elemType == longTag;
  if (must_load_count) {
    // count for long must be in register
    count.load_item();
  } else {
    count.dont_load_item();
  }
  value.load_item();
  RInfo tmp;
  if (elemType == intTag && count.is_register()) {
    // in case we cache the count, we want always to have a register free
    // (without caching, the count may be loaded in ecx; with the caching count,
    // the count register may not be ecx
    tmp = new_register(T_INT)->rinfo();
  }
  RInfo reg = rlock_result(x)->rinfo();

  emit()->shift_op(x->op(), reg, value.result(), count.result(), tmp);
}
示例#8
0
void LIRGenerator::do_AttemptUpdate(Intrinsic* x) {
  assert(x->number_of_arguments() == 3, "wrong type");
  LIRItem obj       (x->argument_at(0), this);  // AtomicLong object
  LIRItem cmp_value (x->argument_at(1), this);  // value to compare with field
  LIRItem new_value (x->argument_at(2), this);  // replace field with new_value if it matches cmp_value

  // compare value must be in rdx,eax (hi,lo); may be destroyed by cmpxchg8 instruction
  cmp_value.load_item_force(FrameMap::long0_opr);

  // new value must be in rcx,ebx (hi,lo)
  new_value.load_item_force(FrameMap::long1_opr);

  // object pointer register is overwritten with field address
  obj.load_item();

  // generate compare-and-swap; produces zero condition if swap occurs
  int value_offset = sun_misc_AtomicLongCSImpl::value_offset();
  LIR_Opr addr = new_pointer_register();
  __ leal(LIR_OprFact::address(new LIR_Address(obj.result(), value_offset, T_LONG)), addr);
  LIR_Opr t1 = LIR_OprFact::illegalOpr;  // no temp needed
  LIR_Opr t2 = LIR_OprFact::illegalOpr;  // no temp needed
  __ cas_long(addr, cmp_value.result(), new_value.result(), t1, t2);

  // generate conditional move of boolean result
  LIR_Opr result = rlock_result(x);
  __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result, T_LONG);
}
void LIRGenerator::do_CheckCast(CheckCast* x) {
  LIRItem obj(x->obj(), this);
  CodeEmitInfo* patching_info = NULL;
  if (!x->klass()->is_loaded() || (PatchALot && !x->is_incompatible_class_change_check())) {
    // must do this before locking the destination register as an oop register,
    // and before the obj is loaded (so x->obj()->item() is valid for creating a debug info location)
    patching_info = state_for(x, x->state_before());
  }
  obj.load_item();
  LIR_Opr out_reg = rlock_result(x);
  CodeStub* stub;
  CodeEmitInfo* info_for_exception = state_for(x, x->state()->copy_locks());

  if (x->is_incompatible_class_change_check()) {
    assert(patching_info == NULL, "can't patch this");
    stub = new SimpleExceptionStub(Runtime1::throw_incompatible_class_change_error_id, LIR_OprFact::illegalOpr, info_for_exception);
  } else {
    stub = new SimpleExceptionStub(Runtime1::throw_class_cast_exception_id, obj.result(), info_for_exception);
  }
  LIR_Opr tmp1 = FrameMap::G1_oop_opr;
  LIR_Opr tmp2 = FrameMap::G3_oop_opr;
  LIR_Opr tmp3 = FrameMap::G4_oop_opr;
  __ checkcast(out_reg, obj.result(), x->klass(), tmp1, tmp2, tmp3,
               x->direct_compare(), info_for_exception, patching_info, stub,
               x->profiled_method(), x->profiled_bci());
}
void LIRGenerator::do_NewMultiArray(NewMultiArray* x) {
  Values* dims = x->dims();
  int i = dims->length();
  LIRItemList* items = new LIRItemList(dims->length(), NULL);
  while (i-- > 0) {
    LIRItem* size = new LIRItem(dims->at(i), this);
    items->at_put(i, size);
  }

  // need to get the info before, as the items may become invalid through item_free
  CodeEmitInfo* patching_info = NULL;
  if (!x->klass()->is_loaded() || PatchALot) {
    patching_info = state_for(x, x->state_before());

    // cannot re-use same xhandlers for multiple CodeEmitInfos, so
    // clone all handlers
    x->set_exception_handlers(new XHandlers(x->exception_handlers()));
  }

  i = dims->length();
  while (i-- > 0) {
    LIRItem* size = items->at(i);
    // if a patching_info was generated above then debug information for the state before
    // the call is going to be emitted.  The LIRGenerator calls above may have left some values
    // in registers and that's been recorded in the CodeEmitInfo.  In that case the items
    // for those values can't simply be freed if they are registers because the values
    // might be destroyed by store_stack_parameter.  So in the case of patching, delay the
    // freeing of the items that already were in registers
    size->load_item();
    store_stack_parameter (size->result(),
                           in_ByteSize(STACK_BIAS +
                                       frame::memory_parameter_word_sp_offset * wordSize +
                                       i * sizeof(jint)));
  }

  // This instruction can be deoptimized in the slow path : use
  // O0 as result register.
  const LIR_Opr reg = result_register_for(x->type());
  CodeEmitInfo* info = state_for(x, x->state());

  jobject2reg_with_patching(reg, x->klass(), patching_info);
  LIR_Opr rank = FrameMap::O1_opr;
  __ move(LIR_OprFact::intConst(x->rank()), rank);
  LIR_Opr varargs = FrameMap::as_pointer_opr(O2);
  int offset_from_sp = (frame::memory_parameter_word_sp_offset * wordSize) + STACK_BIAS;
  __ add(FrameMap::SP_opr,
         LIR_OprFact::intptrConst(offset_from_sp),
         varargs);
  LIR_OprList* args = new LIR_OprList(3);
  args->append(reg);
  args->append(rank);
  args->append(varargs);
  __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id),
                  LIR_OprFact::illegalOpr,
                  reg, args, info);

  LIR_Opr result = rlock_result(x);
  __ move(reg, result);
}
// _ineg, _lneg, _fneg, _dneg
void LIRGenerator::do_NegateOp(NegateOp* x) {
  LIRItem value(x->x(), this);
  value.set_destroys_register();
  value.load_item();
  RInfo reg = rlock_result(x)->rinfo();
  emit()->negate(reg, value.result());

  round_item(x->operand());
}
// _iand, _land, _ior, _lor, _ixor, _lxor
void LIRGenerator::do_LogicOp(LogicOp* x) {
  LIRItem left(x->x(), this);
  LIRItem right(x->y(), this);

  left.load_item();
  right.load_nonconstant();
  LIR_Opr reg = rlock_result(x);

  logic_op(x->op(), reg, left.result(), right.result());
}
void LIRGenerator::do_MathIntrinsic(Intrinsic* x) {
  assert(x->number_of_arguments() == 1, "wrong type");
  LIRItem value(x->argument_at(0), this);
  value.set_destroys_register();
  value.load_item();
  RInfo reg = rlock_result(x)->rinfo();

  emit()->math_intrinsic(x->id(), reg, value.result());

  round_item(x->operand());
}
void LIRGenerator::do_MathIntrinsic(Intrinsic* x) {
  switch (x->id()) {
    case vmIntrinsics::_dabs:
    case vmIntrinsics::_dsqrt: {
      assert(x->number_of_arguments() == 1, "wrong type");
      LIRItem value(x->argument_at(0), this);
      value.load_item();
      LIR_Opr dst = rlock_result(x);

      switch (x->id()) {
      case vmIntrinsics::_dsqrt: {
        __ sqrt(value.result(), dst, LIR_OprFact::illegalOpr);
        break;
      }
      case vmIntrinsics::_dabs: {
        __ abs(value.result(), dst, LIR_OprFact::illegalOpr);
        break;
      }
      }
      break;
    }
    case vmIntrinsics::_dlog10: // fall through
    case vmIntrinsics::_dlog: // fall through
    case vmIntrinsics::_dsin: // fall through
    case vmIntrinsics::_dtan: // fall through
    case vmIntrinsics::_dcos: {
      assert(x->number_of_arguments() == 1, "wrong type");

      address runtime_entry = NULL;
      switch (x->id()) {
      case vmIntrinsics::_dsin:
        runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin);
        break;
      case vmIntrinsics::_dcos:
        runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos);
        break;
      case vmIntrinsics::_dtan:
        runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan);
        break;
      case vmIntrinsics::_dlog:
        runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog);
        break;
      case vmIntrinsics::_dlog10:
        runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10);
        break;
      default:
        ShouldNotReachHere();
      }

      LIR_Opr result = call_runtime(x->argument_at(0), runtime_entry, x->type(), NULL);
      set_result(x, result);
    }
  }
}
// _iand, _land, _ior, _lor, _ixor, _lxor
void LIRGenerator::do_LogicOp(LogicOp* x) {
  // missing test if instr is commutative and if we should swap
  LIRItem left(x->x(), this);
  LIRItem right(x->y(), this);
  left.set_destroys_register();
  left.load_item();
  right.load_nonconstant();
  RInfo reg = rlock_result(x)->rinfo();

  emit()->logic_op(x->op(), reg, left.result(), right.result());
}
示例#16
0
void LIRGenerator::do_MathIntrinsic(Intrinsic* x) {
  assert(x->number_of_arguments() == 1, "wrong type");
  LIRItem value(x->argument_at(0), this);

  bool use_fpu = false;
  if (UseSSE >= 2) {
    switch(x->id()) {
      case vmIntrinsics::_dsin:
      case vmIntrinsics::_dcos:
      case vmIntrinsics::_dtan:
      case vmIntrinsics::_dlog:
      case vmIntrinsics::_dlog10:
        use_fpu = true;
    }
  } else {
    value.set_destroys_register();
  }

  value.load_item();

  LIR_Opr calc_input = value.result();
  LIR_Opr calc_result = rlock_result(x);

  // sin and cos need two free fpu stack slots, so register two temporary operands
  LIR_Opr tmp1 = FrameMap::caller_save_fpu_reg_at(0);
  LIR_Opr tmp2 = FrameMap::caller_save_fpu_reg_at(1);

  if (use_fpu) {
    LIR_Opr tmp = FrameMap::fpu0_double_opr;
    __ move(calc_input, tmp);

    calc_input = tmp;
    calc_result = tmp;
    tmp1 = FrameMap::caller_save_fpu_reg_at(1);
    tmp2 = FrameMap::caller_save_fpu_reg_at(2);
  }

  switch(x->id()) {
    case vmIntrinsics::_dabs:   __ abs  (calc_input, calc_result, LIR_OprFact::illegalOpr); break;
    case vmIntrinsics::_dsqrt:  __ sqrt (calc_input, calc_result, LIR_OprFact::illegalOpr); break;
    case vmIntrinsics::_dsin:   __ sin  (calc_input, calc_result, tmp1, tmp2);              break;
    case vmIntrinsics::_dcos:   __ cos  (calc_input, calc_result, tmp1, tmp2);              break;
    case vmIntrinsics::_dtan:   __ tan  (calc_input, calc_result, tmp1, tmp2);              break;
    case vmIntrinsics::_dlog:   __ log  (calc_input, calc_result, tmp1);                    break;
    case vmIntrinsics::_dlog10: __ log10(calc_input, calc_result, tmp1);                    break;
    default:                    ShouldNotReachHere();
  }

  if (use_fpu) {
    __ move(calc_result, x->operand());
  }
}
// for  _ladd, _lmul, _lsub, _ldiv, _lrem
void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) {
  switch (x->op()) {
  case Bytecodes::_lrem:
  case Bytecodes::_lmul:
  case Bytecodes::_ldiv: {

    if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem) {
      LIRItem right(x->y(), this);
      right.load_item();

      CodeEmitInfo* info = state_for(x);
      LIR_Opr item = right.result();
      assert(item->is_register(), "must be");
      __ cmp(lir_cond_equal, item, LIR_OprFact::longConst(0));
      __ branch(lir_cond_equal, T_LONG, new DivByZeroStub(info));
    }

    address entry;
    switch (x->op()) {
    case Bytecodes::_lrem:
      entry = CAST_FROM_FN_PTR(address, SharedRuntime::lrem);
      break; // check if dividend is 0 is done elsewhere
    case Bytecodes::_ldiv:
      entry = CAST_FROM_FN_PTR(address, SharedRuntime::ldiv);
      break; // check if dividend is 0 is done elsewhere
    case Bytecodes::_lmul:
      entry = CAST_FROM_FN_PTR(address, SharedRuntime::lmul);
      break;
    default:
      ShouldNotReachHere();
    }

    // order of arguments to runtime call is reversed.
    LIR_Opr result = call_runtime(x->y(), x->x(), entry, x->type(), NULL);
    set_result(x, result);
    break;
  }
  case Bytecodes::_ladd:
  case Bytecodes::_lsub: {
    LIRItem left(x->x(), this);
    LIRItem right(x->y(), this);
    left.load_item();
    right.load_item();
    rlock_result(x);

    arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL);
    break;
  }
  default: ShouldNotReachHere();
  }
}
void LIRGenerator::do_InstanceOf(InstanceOf* x) {
  LIRItem obj(x->obj(), this);
  CodeEmitInfo* patching_info = NULL;
  if (!x->klass()->is_loaded() || PatchALot) {
    patching_info = state_for(x, x->state_before());
  }
  // ensure the result register is not the input register because the result is initialized before the patching safepoint
  obj.load_item();
  LIR_Opr out_reg = rlock_result(x);
  LIR_Opr tmp1 = FrameMap::G1_oop_opr;
  LIR_Opr tmp2 = FrameMap::G3_oop_opr;
  LIR_Opr tmp3 = FrameMap::G4_oop_opr;
  __ instanceof(out_reg, obj.result(), x->klass(), tmp1, tmp2, tmp3,  x->direct_compare(), patching_info);
}
示例#19
0
void LIRGenerator::do_NewMultiArray(NewMultiArray* x) {
  Values* dims = x->dims();
  int i = dims->length();
  LIRItemList* items = new LIRItemList(dims->length(), NULL);
  while (i-- > 0) {
    LIRItem* size = new LIRItem(dims->at(i), this);
    items->at_put(i, size);
  }

  // Evaluate state_for early since it may emit code.
  CodeEmitInfo* patching_info = NULL;
  if (!x->klass()->is_loaded() || PatchALot) {
    patching_info = state_for(x, x->state_before());

    // cannot re-use same xhandlers for multiple CodeEmitInfos, so
    // clone all handlers.  This is handled transparently in other
    // places by the CodeEmitInfo cloning logic but is handled
    // specially here because a stub isn't being used.
    x->set_exception_handlers(new XHandlers(x->exception_handlers()));
  }
  CodeEmitInfo* info = state_for(x, x->state());

  i = dims->length();
  while (i-- > 0) {
    LIRItem* size = items->at(i);
    size->load_nonconstant();

    store_stack_parameter(size->result(), in_ByteSize(i*4));
  }

  LIR_Opr reg = result_register_for(x->type());
  jobject2reg_with_patching(reg, x->klass(), patching_info);

  LIR_Opr rank = FrameMap::rbx_opr;
  __ move(LIR_OprFact::intConst(x->rank()), rank);
  LIR_Opr varargs = FrameMap::rcx_opr;
  __ move(FrameMap::rsp_opr, varargs);
  LIR_OprList* args = new LIR_OprList(3);
  args->append(reg);
  args->append(rank);
  args->append(varargs);
  __ call_runtime(Runtime1::entry_for(Runtime1::new_multi_array_id),
                  LIR_OprFact::illegalOpr,
                  reg, args, info);

  LIR_Opr result = rlock_result(x);
  __ move(reg, result);
}
示例#20
0
// _iand, _land, _ior, _lor, _ixor, _lxor
void LIRGenerator::do_LogicOp(LogicOp* x) {
  // when an operand with use count 1 is the left operand, then it is
  // likely that no move for 2-operand-LIR-form is necessary
  if (x->is_commutative() && x->y()->as_Constant() == NULL && x->x()->use_count() > x->y()->use_count()) {
    x->swap_operands();
  }

  LIRItem left(x->x(), this);
  LIRItem right(x->y(), this);

  left.load_item();
  right.load_nonconstant();
  LIR_Opr reg = rlock_result(x);

  logic_op(x->op(), reg, left.result(), right.result());
}
// _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg
void LIRGenerator::do_CompareOp(CompareOp* x) {
  LIRItem left(x->x(), this);
  LIRItem right(x->y(), this);
  left.load_item();
  right.load_item();
  LIR_Opr reg = rlock_result(x);

  if (x->x()->type()->is_float_kind()) {
    Bytecodes::Code code = x->op();
    __ fcmp2int(left.result(), right.result(), reg, (code == Bytecodes::_fcmpl || code == Bytecodes::_dcmpl));
  } else if (x->x()->type()->tag() == longTag) {
    __ lcmp2int(left.result(), right.result(), reg);
  } else {
    Unimplemented();
  }
}
// for  _ladd, _lmul, _lsub, _ldiv, _lrem
void LIRGenerator::do_ArithmeticOp_Long(ArithmeticOp* x) {
  if (x->op() == Bytecodes::_ldiv || x->op() == Bytecodes::_lrem ) {
    // this is a call
    LIRItem left(x->x(),  this);
    LIRItem right(x->y(), this);
    right.set_destroys_register(); // actually: only the div_by_zero destroys register

    left.load_item();
    emit()->push_item(left.result());

    right.load_item();
    emit()->push_item(right.result());

    CodeEmitInfo* info = state_for(x);
    emit()->explicit_div_by_zero_check(right.result(), info);

    set_with_result_register(x);
    emit()->arithmetic_call_op(x->op(), norinfo);
  } else if (x->op() == Bytecodes::_lmul) {
    // missing test if instr is commutative and if we should swap
    LIRItem left(x->x(), this);
    LIRItem right(x->y(), this);
    left.set_destroys_register();
    left.load_item();
    right.load_item();

    // WARNING: for longs, we must guarantee (algorithmically) that the locked lo result
    //          register is not the same as the left-HI register , otherwise we
    //          would overwrite the results.
    //
    set_result(x, FrameMap::_eax_edxRInfo);
    emit()->arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL);
  } else {
    // missing test if instr is commutative and if we should swap
    LIRItem left(x->x(), this);
    LIRItem right(x->y(), this);
    left.set_destroys_register();
    left.load_item();
    right.load_item();
    // WARNING: for longs, we must guarantee (algorithmically) that the locked lo result
    //          register is not the same as the left-HI register , otherwise we
    //          would overwrite the results.
    //
    RInfo reg = rlock_result(x)->rinfo();
    emit()->arithmetic_op_long(x->op(), x->operand(), left.result(), right.result(), NULL);
  }
}
// _lcmp, _fcmpl, _fcmpg, _dcmpl, _dcmpg
void LIRGenerator::do_CompareOp(CompareOp* x) {
  LIRItem left(x->x(), this);
  LIRItem right(x->y(), this);
  ValueTag tag = x->x()->type()->tag();
  if (tag == floatTag || tag == doubleTag) {
    left.set_destroys_register();
    right.set_destroys_register();
  } else {
    if (tag == longTag) {
      left.set_destroys_register();
    }
  }
  left.load_item();
  right.load_item();
  RInfo reg = rlock_result(x)->rinfo();
  emit()->compare_op(x->op(), reg, left.result(), right.result());
}
void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
  assert(x->number_of_arguments() == 4, "wrong type");
  LIRItem obj   (x->argument_at(0), this);  // object
  LIRItem offset(x->argument_at(1), this);  // offset of field
  LIRItem cmp   (x->argument_at(2), this);  // value to compare with field
  LIRItem val   (x->argument_at(3), this);  // replace field with val if matches cmp

  // Use temps to avoid kills
  LIR_Opr t1 = FrameMap::G1_opr;
  LIR_Opr t2 = FrameMap::G3_opr;
  LIR_Opr addr = new_pointer_register();

  // get address of field
  obj.load_item();
  offset.load_item();
  cmp.load_item();
  val.load_item();

  __ add(obj.result(), offset.result(), addr);

  if (type == objectType) {  // Write-barrier needed for Object fields.
    pre_barrier(obj.result(), false, NULL);
  }

  if (type == objectType)
    __ cas_obj(addr, cmp.result(), val.result(), t1, t2);
  else if (type == intType)
    __ cas_int(addr, cmp.result(), val.result(), t1, t2);
  else if (type == longType)
    __ cas_long(addr, cmp.result(), val.result(), t1, t2);
  else {
    ShouldNotReachHere();
  }

  // generate conditional move of boolean result
  LIR_Opr result = rlock_result(x);
  __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result);
  if (type == objectType) {  // Write-barrier needed for Object fields.
#ifdef PRECISE_CARDMARK
    post_barrier(addr, val.result());
#else
    post_barrier(obj.result(), val.result());
#endif // PRECISE_CARDMARK
  }
}
示例#25
0
void LIRGenerator::do_NewInstance(NewInstance* x) {
#ifndef PRODUCT
  if (PrintNotLoaded && !x->klass()->is_loaded()) {
    tty->print_cr("   ###class not loaded at new bci %d", x->printable_bci());
  }
#endif
  CodeEmitInfo* info = state_for(x, x->state());
  LIR_Opr reg = result_register_for(x->type());
  LIR_Opr klass_reg = new_register(objectType);
  new_instance(reg, x->klass(),
                       FrameMap::rcx_oop_opr,
                       FrameMap::rdi_oop_opr,
                       FrameMap::rsi_oop_opr,
                       LIR_OprFact::illegalOpr,
                       FrameMap::rdx_oop_opr, info);
  LIR_Opr result = rlock_result(x);
  __ move(reg, result);
}
示例#26
0
// _ishl, _lshl, _ishr, _lshr, _iushr, _lushr
void LIRGenerator::do_ShiftOp(ShiftOp* x) {
  // count must always be in rcx
  LIRItem value(x->x(), this);
  LIRItem count(x->y(), this);

  ValueTag elemType = x->type()->tag();
  bool must_load_count = !count.is_constant() || elemType == longTag;
  if (must_load_count) {
    // count for long must be in register
    count.load_item_force(shiftCountOpr());
  } else {
    count.dont_load_item();
  }
  value.load_item();
  LIR_Opr reg = rlock_result(x);

  shift_op(x->op(), reg, value.result(), count.result(), LIR_OprFact::illegalOpr);
}
void LIRGenerator::do_NewInstance(NewInstance* x) {
  // This instruction can be deoptimized in the slow path : use
  // O0 as result register.
  const LIR_Opr reg = result_register_for(x->type());

  if (PrintNotLoaded && !x->klass()->is_loaded()) {
    tty->print_cr("   ###class not loaded at new bci %d", x->bci());
  }
  CodeEmitInfo* info = state_for(x, x->state());
  LIR_Opr tmp1 = FrameMap::G1_oop_opr;
  LIR_Opr tmp2 = FrameMap::G3_oop_opr;
  LIR_Opr tmp3 = FrameMap::G4_oop_opr;
  LIR_Opr tmp4 = FrameMap::O1_oop_opr;
  LIR_Opr klass_reg = FrameMap::G5_oop_opr;
  new_instance(reg, x->klass(), tmp1, tmp2, tmp3, tmp4, klass_reg, info);
  LIR_Opr result = rlock_result(x);
  __ move(reg, result);
}
示例#28
0
void LIRGenerator::do_InstanceOf(InstanceOf* x) {
  LIRItem obj(x->obj(), this);

  // result and test object may not be in same register
  LIR_Opr reg = rlock_result(x);
  CodeEmitInfo* patching_info = NULL;
  if ((!x->klass()->is_loaded() || PatchALot)) {
    // must do this before locking the destination register as an oop register
    patching_info = state_for(x, x->state_before());
  }
  obj.load_item();
  LIR_Opr tmp3 = LIR_OprFact::illegalOpr;
  if (!x->klass()->is_loaded() || UseCompressedOops) {
    tmp3 = new_register(objectType);
  }
  __ instanceof(reg, obj.result(), x->klass(),
                new_register(objectType), new_register(objectType), tmp3,
                x->direct_compare(), patching_info, x->profiled_method(), x->profiled_bci());
}
// _ishl, _lshl, _ishr, _lshr, _iushr, _lushr
void LIRGenerator::do_ShiftOp(ShiftOp* x) {
  LIRItem value(x->x(), this);
  LIRItem count(x->y(), this);
  // Long shift destroys count register
  if (value.type()->is_long()) {
    count.set_destroys_register();
  }
  value.load_item();
  // the old backend doesn't support this
  if (count.is_constant() && count.type()->as_IntConstant() != NULL && value.type()->is_int()) {
    jint c = count.get_jint_constant() & 0x1f;
    assert(c >= 0 && c < 32, "should be small");
    count.dont_load_item();
  } else {
    count.load_item();
  }
  LIR_Opr reg = rlock_result(x);
  shift_op(x->op(), reg, value.result(), count.result(), LIR_OprFact::illegalOpr);
}
void LIRGenerator::do_InstanceOf(InstanceOf* x) {
  spill_values_on_stack(x->state());
  LIRItem obj(x->obj(), this);
  obj.set_destroys_register();
  // result and test object may not be in same register
  RInfo reg = rlock_result(x)->rinfo();
  CodeEmitInfo* patching_info = NULL;
  if ((!x->klass()->is_loaded() || PatchALot)) {
    // must do this before locking the destination register as an oop register
    patching_info = state_for(x, x->state_before());
  }
  obj.load_item();
  // do not include tmp in the oop map
  if (patching_info != NULL) {
    // object must be part of the oop map
    patching_info->add_register_oop(obj.result()->rinfo());
  }
  RInfo tmp = new_register(objectType)->rinfo();
  emit()->instanceof_op(LIR_OprFact::rinfo(reg, T_OBJECT), obj.result(), x->klass(), tmp, obj.result()->rinfo(), x->direct_compare(), patching_info);
}