src/v8/src/compiler/js-graph.h

   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