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| 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/node-properties.h" |
| 13 |
| 14 namespace v8 { |
| 15 namespace internal { |
| 16 namespace compiler { |
| 17 |
| 18 class Typer; |
| 19 |
| 20 // Implements a facade on a Graph, enhancing the graph with JS-specific |
| 21 // notions, including a builder for for JS* operators, canonicalized global |
| 22 // constants, and various helper methods. |
| 23 class JSGraph : public ZoneObject { |
| 24 public: |
| 25 JSGraph(Graph* graph, CommonOperatorBuilder* common, Typer* typer) |
| 26 : graph_(graph), |
| 27 common_(common), |
| 28 javascript_(zone()), |
| 29 typer_(typer), |
| 30 cache_(zone()) {} |
| 31 |
| 32 // Canonicalized global constants. |
| 33 Node* UndefinedConstant(); |
| 34 Node* TheHoleConstant(); |
| 35 Node* TrueConstant(); |
| 36 Node* FalseConstant(); |
| 37 Node* NullConstant(); |
| 38 Node* ZeroConstant(); |
| 39 Node* OneConstant(); |
| 40 Node* NaNConstant(); |
| 41 |
| 42 // Creates a HeapConstant node, possibly canonicalized, without inspecting the |
| 43 // object. |
| 44 Node* HeapConstant(PrintableUnique<Object> value); |
| 45 |
| 46 // Creates a HeapConstant node, possibly canonicalized, and may access the |
| 47 // heap to inspect the object. |
| 48 Node* HeapConstant(Handle<Object> value); |
| 49 |
| 50 // Creates a Constant node of the appropriate type for the given object. |
| 51 // Accesses the heap to inspect the object and determine whether one of the |
| 52 // canonicalized globals or a number constant should be returned. |
| 53 Node* Constant(Handle<Object> value); |
| 54 |
| 55 // Creates a NumberConstant node, usually canonicalized. |
| 56 Node* Constant(double value); |
| 57 |
| 58 // Creates a NumberConstant node, usually canonicalized. |
| 59 Node* Constant(int32_t value); |
| 60 |
| 61 // Creates a Int32Constant node, usually canonicalized. |
| 62 Node* Int32Constant(int32_t value); |
| 63 |
| 64 // Creates a Float64Constant node, usually canonicalized. |
| 65 Node* Float64Constant(double value); |
| 66 |
| 67 // Creates an ExternalConstant node, usually canonicalized. |
| 68 Node* ExternalConstant(ExternalReference ref); |
| 69 |
| 70 Node* SmiConstant(int32_t immediate) { |
| 71 ASSERT(Smi::IsValid(immediate)); |
| 72 return Constant(immediate); |
| 73 } |
| 74 |
| 75 JSOperatorBuilder* javascript() { return &javascript_; } |
| 76 CommonOperatorBuilder* common() { return common_; } |
| 77 Graph* graph() { return graph_; } |
| 78 Zone* zone() { return graph()->zone(); } |
| 79 |
| 80 private: |
| 81 Graph* graph_; |
| 82 CommonOperatorBuilder* common_; |
| 83 JSOperatorBuilder javascript_; |
| 84 Typer* typer_; |
| 85 |
| 86 SetOncePointer<Node> undefined_constant_; |
| 87 SetOncePointer<Node> the_hole_constant_; |
| 88 SetOncePointer<Node> true_constant_; |
| 89 SetOncePointer<Node> false_constant_; |
| 90 SetOncePointer<Node> null_constant_; |
| 91 SetOncePointer<Node> zero_constant_; |
| 92 SetOncePointer<Node> one_constant_; |
| 93 SetOncePointer<Node> nan_constant_; |
| 94 |
| 95 CommonNodeCache cache_; |
| 96 |
| 97 Node* ImmovableHeapConstant(Handle<Object> value); |
| 98 Node* NumberConstant(double value); |
| 99 Node* NewNode(Operator* op); |
| 100 |
| 101 Factory* factory() { return zone()->isolate()->factory(); } |
| 102 }; |
| 103 } // namespace compiler |
| 104 } // namespace internal |
| 105 } // namespace v8 |
| 106 |
| 107 #endif |
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