Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 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 |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_COMPILER_JS_GRAPH_H_ |
| 6 | #define V8_COMPILER_JS_GRAPH_H_ |
| 7 | |
| 8 | #include "src/compiler/common-node-cache.h" |
| 9 | #include "src/compiler/common-operator.h" |
| 10 | #include "src/compiler/graph.h" |
| 11 | #include "src/compiler/js-operator.h" |
| 12 | #include "src/compiler/machine-operator.h" |
| 13 | #include "src/compiler/node-properties.h" |
| 14 | |
| 15 | namespace v8 { |
| 16 | namespace internal { |
| 17 | namespace compiler { |
| 18 | |
| 19 | class Typer; |
| 20 | |
| 21 | // Implements a facade on a Graph, enhancing the graph with JS-specific |
| 22 | // notions, including a builder for for JS* operators, canonicalized global |
| 23 | // constants, and various helper methods. |
| 24 | class JSGraph : public ZoneObject { |
| 25 | public: |
| 26 | JSGraph(Graph* graph, CommonOperatorBuilder* common, |
| 27 | JSOperatorBuilder* javascript, Typer* typer, |
| 28 | MachineOperatorBuilder* machine) |
| 29 | : graph_(graph), |
| 30 | common_(common), |
| 31 | javascript_(javascript), |
| 32 | typer_(typer), |
| 33 | machine_(machine), |
| 34 | cache_(zone()) {} |
| 35 | |
| 36 | // Canonicalized global constants. |
| 37 | Node* CEntryStubConstant(); |
| 38 | Node* UndefinedConstant(); |
| 39 | Node* TheHoleConstant(); |
| 40 | Node* TrueConstant(); |
| 41 | Node* FalseConstant(); |
| 42 | Node* NullConstant(); |
| 43 | Node* ZeroConstant(); |
| 44 | Node* OneConstant(); |
| 45 | Node* NaNConstant(); |
| 46 | |
| 47 | // Creates a HeapConstant node, possibly canonicalized, without inspecting the |
| 48 | // object. |
| 49 | Node* HeapConstant(Unique<Object> value); |
| 50 | |
| 51 | // Creates a HeapConstant node, possibly canonicalized, and may access the |
| 52 | // heap to inspect the object. |
| 53 | Node* HeapConstant(Handle<Object> value); |
| 54 | |
| 55 | // Creates a Constant node of the appropriate type for the given object. |
| 56 | // Accesses the heap to inspect the object and determine whether one of the |
| 57 | // canonicalized globals or a number constant should be returned. |
| 58 | Node* Constant(Handle<Object> value); |
| 59 | |
| 60 | // Creates a NumberConstant node, usually canonicalized. |
| 61 | Node* Constant(double value); |
| 62 | |
| 63 | // Creates a NumberConstant node, usually canonicalized. |
| 64 | Node* Constant(int32_t value); |
| 65 | |
| 66 | // Creates a Int32Constant node, usually canonicalized. |
| 67 | Node* Int32Constant(int32_t value); |
| 68 | Node* Uint32Constant(uint32_t value) { |
| 69 | return Int32Constant(bit_cast<int32_t>(value)); |
| 70 | } |
| 71 | |
| 72 | // Creates a Float64Constant node, usually canonicalized. |
| 73 | Node* Float64Constant(double value); |
| 74 | |
| 75 | // Creates an ExternalConstant node, usually canonicalized. |
| 76 | Node* ExternalConstant(ExternalReference ref); |
| 77 | |
| 78 | Node* SmiConstant(int32_t immediate) { |
| 79 | DCHECK(Smi::IsValid(immediate)); |
| 80 | return Constant(immediate); |
| 81 | } |
| 82 | |
| 83 | JSOperatorBuilder* javascript() { return javascript_; } |
| 84 | CommonOperatorBuilder* common() { return common_; } |
| 85 | MachineOperatorBuilder* machine() { return machine_; } |
| 86 | Graph* graph() { return graph_; } |
| 87 | Zone* zone() { return graph()->zone(); } |
| 88 | Isolate* isolate() { return zone()->isolate(); } |
| 89 | |
| 90 | private: |
| 91 | Graph* graph_; |
| 92 | CommonOperatorBuilder* common_; |
| 93 | JSOperatorBuilder* javascript_; |
| 94 | Typer* typer_; |
| 95 | MachineOperatorBuilder* machine_; |
| 96 | |
| 97 | SetOncePointer<Node> c_entry_stub_constant_; |
| 98 | SetOncePointer<Node> undefined_constant_; |
| 99 | SetOncePointer<Node> the_hole_constant_; |
| 100 | SetOncePointer<Node> true_constant_; |
| 101 | SetOncePointer<Node> false_constant_; |
| 102 | SetOncePointer<Node> null_constant_; |
| 103 | SetOncePointer<Node> zero_constant_; |
| 104 | SetOncePointer<Node> one_constant_; |
| 105 | SetOncePointer<Node> nan_constant_; |
| 106 | |
| 107 | CommonNodeCache cache_; |
| 108 | |
| 109 | Node* ImmovableHeapConstant(Handle<Object> value); |
| 110 | Node* NumberConstant(double value); |
| 111 | Node* NewNode(const Operator* op); |
| 112 | |
| 113 | Factory* factory() { return isolate()->factory(); } |
| 114 | }; |
| 115 | |
| 116 | } // namespace compiler |
| 117 | } // namespace internal |
| 118 | } // namespace v8 |
| 119 | |
| 120 | #endif |