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1 // Copyright 2006-2009 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2009 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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4424 void CodeGenerator::VisitProperty(Property* node) { | 4424 void CodeGenerator::VisitProperty(Property* node) { |
4425 Comment cmnt(masm_, "[ Property"); | 4425 Comment cmnt(masm_, "[ Property"); |
4426 Reference property(this, node); | 4426 Reference property(this, node); |
4427 property.GetValue(typeof_state()); | 4427 property.GetValue(typeof_state()); |
4428 } | 4428 } |
4429 | 4429 |
4430 | 4430 |
4431 void CodeGenerator::VisitCall(Call* node) { | 4431 void CodeGenerator::VisitCall(Call* node) { |
4432 Comment cmnt(masm_, "[ Call"); | 4432 Comment cmnt(masm_, "[ Call"); |
4433 | 4433 |
| 4434 Expression* function = node->expression(); |
4434 ZoneList<Expression*>* args = node->arguments(); | 4435 ZoneList<Expression*>* args = node->arguments(); |
4435 | 4436 |
4436 // Check if the function is a variable or a property. | 4437 // Check if the function is a variable or a property. |
4437 Expression* function = node->expression(); | |
4438 Variable* var = function->AsVariableProxy()->AsVariable(); | 4438 Variable* var = function->AsVariableProxy()->AsVariable(); |
4439 Property* property = function->AsProperty(); | 4439 Property* property = function->AsProperty(); |
4440 | 4440 |
4441 // ------------------------------------------------------------------------ | 4441 // ------------------------------------------------------------------------ |
4442 // Fast-case: Use inline caching. | 4442 // Fast-case: Use inline caching. |
4443 // --- | 4443 // --- |
4444 // According to ECMA-262, section 11.2.3, page 44, the function to call | 4444 // According to ECMA-262, section 11.2.3, page 44, the function to call |
4445 // must be resolved after the arguments have been evaluated. The IC code | 4445 // must be resolved after the arguments have been evaluated. The IC code |
4446 // automatically handles this by loading the arguments before the function | 4446 // automatically handles this by loading the arguments before the function |
4447 // is resolved in cache misses (this also holds for megamorphic calls). | 4447 // is resolved in cache misses (this also holds for megamorphic calls). |
4448 // ------------------------------------------------------------------------ | 4448 // ------------------------------------------------------------------------ |
4449 | 4449 |
4450 if (var != NULL && !var->is_this() && var->is_global()) { | 4450 if (var != NULL && var->is_possibly_eval()) { |
| 4451 // ---------------------------------- |
| 4452 // JavaScript example: 'eval(arg)' // eval is not known to be shadowed |
| 4453 // ---------------------------------- |
| 4454 |
| 4455 // In a call to eval, we first call %ResolvePossiblyDirectEval to |
| 4456 // resolve the function we need to call and the receiver of the |
| 4457 // call. Then we call the resolved function using the given |
| 4458 // arguments. |
| 4459 |
| 4460 // Prepare the stack for the call to the resolved function. |
| 4461 Load(function); |
| 4462 |
| 4463 // Allocate a frame slot for the receiver. |
| 4464 frame_->Push(Factory::undefined_value()); |
| 4465 int arg_count = args->length(); |
| 4466 for (int i = 0; i < arg_count; i++) { |
| 4467 Load(args->at(i)); |
| 4468 } |
| 4469 |
| 4470 // Prepare the stack for the call to ResolvePossiblyDirectEval. |
| 4471 frame_->PushElementAt(arg_count + 1); |
| 4472 if (arg_count > 0) { |
| 4473 frame_->PushElementAt(arg_count); |
| 4474 } else { |
| 4475 frame_->Push(Factory::undefined_value()); |
| 4476 } |
| 4477 |
| 4478 // Resolve the call. |
| 4479 Result result = |
| 4480 frame_->CallRuntime(Runtime::kResolvePossiblyDirectEval, 2); |
| 4481 |
| 4482 // Touch up the stack with the right values for the function and the |
| 4483 // receiver. Use a scratch register to avoid destroying the result. |
| 4484 Result scratch = allocator_->Allocate(); |
| 4485 ASSERT(scratch.is_valid()); |
| 4486 __ mov(scratch.reg(), FieldOperand(result.reg(), FixedArray::kHeaderSize)); |
| 4487 frame_->SetElementAt(arg_count + 1, &scratch); |
| 4488 |
| 4489 // We can reuse the result register now. |
| 4490 frame_->Spill(result.reg()); |
| 4491 __ mov(result.reg(), |
| 4492 FieldOperand(result.reg(), FixedArray::kHeaderSize + kPointerSize)); |
| 4493 frame_->SetElementAt(arg_count, &result); |
| 4494 |
| 4495 // Call the function. |
| 4496 CodeForSourcePosition(node->position()); |
| 4497 InLoopFlag in_loop = loop_nesting() > 0 ? IN_LOOP : NOT_IN_LOOP; |
| 4498 CallFunctionStub call_function(arg_count, in_loop); |
| 4499 result = frame_->CallStub(&call_function, arg_count + 1); |
| 4500 |
| 4501 // Restore the context and overwrite the function on the stack with |
| 4502 // the result. |
| 4503 frame_->RestoreContextRegister(); |
| 4504 frame_->SetElementAt(0, &result); |
| 4505 |
| 4506 } else if (var != NULL && !var->is_this() && var->is_global()) { |
4451 // ---------------------------------- | 4507 // ---------------------------------- |
4452 // JavaScript example: 'foo(1, 2, 3)' // foo is global | 4508 // JavaScript example: 'foo(1, 2, 3)' // foo is global |
4453 // ---------------------------------- | 4509 // ---------------------------------- |
4454 | 4510 |
4455 // Push the name of the function and the receiver onto the stack. | 4511 // Push the name of the function and the receiver onto the stack. |
4456 frame_->Push(var->name()); | 4512 frame_->Push(var->name()); |
4457 | 4513 |
4458 // Pass the global object as the receiver and let the IC stub | 4514 // Pass the global object as the receiver and let the IC stub |
4459 // patch the stack to use the global proxy as 'this' in the | 4515 // patch the stack to use the global proxy as 'this' in the |
4460 // invoked function. | 4516 // invoked function. |
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4609 | 4665 |
4610 // Call the construct call builtin that handles allocation and | 4666 // Call the construct call builtin that handles allocation and |
4611 // constructor invocation. | 4667 // constructor invocation. |
4612 CodeForSourcePosition(node->position()); | 4668 CodeForSourcePosition(node->position()); |
4613 Result result = frame_->CallConstructor(arg_count); | 4669 Result result = frame_->CallConstructor(arg_count); |
4614 // Replace the function on the stack with the result. | 4670 // Replace the function on the stack with the result. |
4615 frame_->SetElementAt(0, &result); | 4671 frame_->SetElementAt(0, &result); |
4616 } | 4672 } |
4617 | 4673 |
4618 | 4674 |
4619 void CodeGenerator::VisitCallEval(CallEval* node) { | |
4620 Comment cmnt(masm_, "[ CallEval"); | |
4621 | |
4622 // In a call to eval, we first call %ResolvePossiblyDirectEval to resolve | |
4623 // the function we need to call and the receiver of the call. | |
4624 // Then we call the resolved function using the given arguments. | |
4625 | |
4626 ZoneList<Expression*>* args = node->arguments(); | |
4627 Expression* function = node->expression(); | |
4628 | |
4629 // Prepare the stack for the call to the resolved function. | |
4630 Load(function); | |
4631 | |
4632 // Allocate a frame slot for the receiver. | |
4633 frame_->Push(Factory::undefined_value()); | |
4634 int arg_count = args->length(); | |
4635 for (int i = 0; i < arg_count; i++) { | |
4636 Load(args->at(i)); | |
4637 } | |
4638 | |
4639 // Prepare the stack for the call to ResolvePossiblyDirectEval. | |
4640 frame_->PushElementAt(arg_count + 1); | |
4641 if (arg_count > 0) { | |
4642 frame_->PushElementAt(arg_count); | |
4643 } else { | |
4644 frame_->Push(Factory::undefined_value()); | |
4645 } | |
4646 | |
4647 // Resolve the call. | |
4648 Result result = | |
4649 frame_->CallRuntime(Runtime::kResolvePossiblyDirectEval, 2); | |
4650 | |
4651 // Touch up the stack with the right values for the function and the | |
4652 // receiver. Use a scratch register to avoid destroying the result. | |
4653 Result scratch = allocator_->Allocate(); | |
4654 ASSERT(scratch.is_valid()); | |
4655 __ mov(scratch.reg(), FieldOperand(result.reg(), FixedArray::kHeaderSize)); | |
4656 frame_->SetElementAt(arg_count + 1, &scratch); | |
4657 | |
4658 // We can reuse the result register now. | |
4659 frame_->Spill(result.reg()); | |
4660 __ mov(result.reg(), | |
4661 FieldOperand(result.reg(), FixedArray::kHeaderSize + kPointerSize)); | |
4662 frame_->SetElementAt(arg_count, &result); | |
4663 | |
4664 // Call the function. | |
4665 CodeForSourcePosition(node->position()); | |
4666 InLoopFlag in_loop = loop_nesting() > 0 ? IN_LOOP : NOT_IN_LOOP; | |
4667 CallFunctionStub call_function(arg_count, in_loop); | |
4668 result = frame_->CallStub(&call_function, arg_count + 1); | |
4669 | |
4670 // Restore the context and overwrite the function on the stack with | |
4671 // the result. | |
4672 frame_->RestoreContextRegister(); | |
4673 frame_->SetElementAt(0, &result); | |
4674 } | |
4675 | |
4676 | |
4677 void CodeGenerator::GenerateIsSmi(ZoneList<Expression*>* args) { | 4675 void CodeGenerator::GenerateIsSmi(ZoneList<Expression*>* args) { |
4678 ASSERT(args->length() == 1); | 4676 ASSERT(args->length() == 1); |
4679 Load(args->at(0)); | 4677 Load(args->at(0)); |
4680 Result value = frame_->Pop(); | 4678 Result value = frame_->Pop(); |
4681 value.ToRegister(); | 4679 value.ToRegister(); |
4682 ASSERT(value.is_valid()); | 4680 ASSERT(value.is_valid()); |
4683 __ test(value.reg(), Immediate(kSmiTagMask)); | 4681 __ test(value.reg(), Immediate(kSmiTagMask)); |
4684 value.Unuse(); | 4682 value.Unuse(); |
4685 destination()->Split(zero); | 4683 destination()->Split(zero); |
4686 } | 4684 } |
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7972 | 7970 |
7973 int CompareStub::MinorKey() { | 7971 int CompareStub::MinorKey() { |
7974 // Encode the two parameters in a unique 16 bit value. | 7972 // Encode the two parameters in a unique 16 bit value. |
7975 ASSERT(static_cast<unsigned>(cc_) < (1 << 15)); | 7973 ASSERT(static_cast<unsigned>(cc_) < (1 << 15)); |
7976 return (static_cast<unsigned>(cc_) << 1) | (strict_ ? 1 : 0); | 7974 return (static_cast<unsigned>(cc_) << 1) | (strict_ ? 1 : 0); |
7977 } | 7975 } |
7978 | 7976 |
7979 #undef __ | 7977 #undef __ |
7980 | 7978 |
7981 } } // namespace v8::internal | 7979 } } // namespace v8::internal |
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