One Zone per CompilationInfo.

src/hydrogen.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 226 matching lines @@
 
   ZoneList<HBasicBlock*> back_edges_;
   HBasicBlock* loop_header_;
   ZoneList<HBasicBlock*> blocks_;
   HStackCheck* stack_check_;
 };
 
 class BoundsCheckTable;
 class HGraph: public ZoneObject {
  public:
-  HGraph(CompilationInfo* info, Zone* zone);
+  explicit HGraph(CompilationInfo* info);
 
   Isolate* isolate() { return isolate_; }
   Zone* zone() const { return zone_; }
+  CompilationInfo* info() const { return info_; }
 
   const ZoneList<HBasicBlock*>* blocks() const { return &blocks_; }
   const ZoneList<HPhi*>* phi_list() const { return phi_list_; }
   HBasicBlock* entry_block() const { return entry_block_; }
   HEnvironment* start_environment() const { return start_environment_; }
 
   void InitializeInferredTypes();
   void InsertTypeConversions();
   void InsertRepresentationChanges();
   void MarkDeoptimizeOnUndefined();
@@ skipping 12 matching lines @@
   // Returns false if there are phi-uses of the arguments-object
   // which are not supported by the optimizing compiler.
   bool CheckArgumentsPhiUses();
 
   // Returns false if there are phi-uses of an uninitialized const
   // which are not supported by the optimizing compiler.
   bool CheckConstPhiUses();
 
   void CollectPhis();
 
-  Handle<Code> Compile(CompilationInfo* info, Zone* zone);
+  Handle<Code> Compile();
 
   void set_undefined_constant(HConstant* constant) {
     undefined_constant_.set(constant);
   }
   HConstant* GetConstantUndefined() const { return undefined_constant_.get(); }
   HConstant* GetConstant1();
   HConstant* GetConstantMinus1();
   HConstant* GetConstantTrue();
   HConstant* GetConstantFalse();
   HConstant* GetConstantHole();
@@ skipping 79 matching lines @@
   SetOncePointer<HConstant> constant_1_;
   SetOncePointer<HConstant> constant_minus1_;
   SetOncePointer<HConstant> constant_true_;
   SetOncePointer<HConstant> constant_false_;
   SetOncePointer<HConstant> constant_hole_;
   SetOncePointer<HArgumentsObject> arguments_object_;
 
   SetOncePointer<HBasicBlock> osr_loop_entry_;
   SetOncePointer<ZoneList<HUnknownOSRValue*> > osr_values_;
 
+  CompilationInfo* info_;
   Zone* zone_;
 
   bool is_recursive_;
 
   DISALLOW_COPY_AND_ASSIGN(HGraph);
 };
 
 
 Zone* HBasicBlock::zone() const { return graph_->zone(); }
 
@@ skipping 430 matching lines @@
 
     // Search the break stack for a break or continue target.
     HBasicBlock* Get(BreakableStatement* stmt, BreakType type, int* drop_extra);
 
    private:
     BreakAndContinueInfo* info_;
     HGraphBuilder* owner_;
     BreakAndContinueScope* next_;
   };
 
-  HGraphBuilder(CompilationInfo* info, TypeFeedbackOracle* oracle, Zone* zone);
+  HGraphBuilder(CompilationInfo* info, TypeFeedbackOracle* oracle);
 
   HGraph* CreateGraph();
 
   // Simple accessors.
   HGraph* graph() const { return graph_; }
   BreakAndContinueScope* break_scope() const { return break_scope_; }
   void set_break_scope(BreakAndContinueScope* head) { break_scope_ = head; }
 
   HBasicBlock* current_block() const { return current_block_; }
   void set_current_block(HBasicBlock* block) { current_block_ = block; }
@@ skipping 581 matching lines @@
   const char* filename_;
   HeapStringAllocator string_allocator_;
   StringStream trace_;
   int indent_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_