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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/code-factory.h" | 5 #include "src/code-factory.h" |
6 #include "src/code-stubs.h" | 6 #include "src/code-stubs.h" |
7 #include "src/compiler/common-operator.h" | 7 #include "src/compiler/common-operator.h" |
8 #include "src/compiler/js-generic-lowering.h" | 8 #include "src/compiler/js-generic-lowering.h" |
9 #include "src/compiler/machine-operator.h" | 9 #include "src/compiler/machine-operator.h" |
10 #include "src/compiler/node-matchers.h" | 10 #include "src/compiler/node-matchers.h" |
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473 node->InsertInput(zone(), 0, stub_code); | 473 node->InsertInput(zone(), 0, stub_code); |
474 node->set_op(common()->Call(desc)); | 474 node->set_op(common()->Call(desc)); |
475 } | 475 } |
476 | 476 |
477 | 477 |
478 void JSGenericLowering::LowerJSCallRuntime(Node* node) { | 478 void JSGenericLowering::LowerJSCallRuntime(Node* node) { |
479 const CallRuntimeParameters& p = CallRuntimeParametersOf(node->op()); | 479 const CallRuntimeParameters& p = CallRuntimeParametersOf(node->op()); |
480 ReplaceWithRuntimeCall(node, p.id(), static_cast<int>(p.arity())); | 480 ReplaceWithRuntimeCall(node, p.id(), static_cast<int>(p.arity())); |
481 } | 481 } |
482 | 482 |
| 483 |
| 484 void JSGenericLowering::LowerJSStackCheck(Node* node) { |
| 485 Node* effect = NodeProperties::GetEffectInput(node); |
| 486 Node* control = NodeProperties::GetControlInput(node); |
| 487 |
| 488 Node* limit = graph()->NewNode( |
| 489 machine()->Load(kMachPtr), |
| 490 jsgraph()->ExternalConstant( |
| 491 ExternalReference::address_of_stack_limit(isolate())), |
| 492 jsgraph()->IntPtrConstant(0), effect, control); |
| 493 Node* pointer = graph()->NewNode(machine()->LoadStackPointer()); |
| 494 |
| 495 Node* check = graph()->NewNode(machine()->UintLessThan(), limit, pointer); |
| 496 Node* branch = |
| 497 graph()->NewNode(common()->Branch(BranchHint::kTrue), check, control); |
| 498 |
| 499 Node* if_true = graph()->NewNode(common()->IfTrue(), branch); |
| 500 Node* etrue = effect; |
| 501 |
| 502 Node* if_false = graph()->NewNode(common()->IfFalse(), branch); |
| 503 NodeProperties::ReplaceControlInput(node, if_false); |
| 504 Node* efalse = node; |
| 505 |
| 506 Node* merge = graph()->NewNode(common()->Merge(2), if_true, if_false); |
| 507 Node* ephi = graph()->NewNode(common()->EffectPhi(2), etrue, efalse, merge); |
| 508 |
| 509 // Relax controls of {node}, i.e. make it free floating. |
| 510 NodeProperties::ReplaceWithValue(node, node, ephi, merge); |
| 511 NodeProperties::ReplaceEffectInput(ephi, efalse, 1); |
| 512 |
| 513 // Turn the stack check into a runtime call. |
| 514 ReplaceWithRuntimeCall(node, Runtime::kStackGuard); |
| 515 } |
| 516 |
483 } // namespace compiler | 517 } // namespace compiler |
484 } // namespace internal | 518 } // namespace internal |
485 } // namespace v8 | 519 } // namespace v8 |
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