Build fast literals in hydrogen.

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 1165 matching lines @@
   static const int kMaxCallPolymorphism = 4;
   static const int kMaxLoadPolymorphism = 4;
   static const int kMaxStorePolymorphism = 4;
 
   // Even in the 'unlimited' case we have to have some limit in order not to
   // overflow the stack.
   static const int kUnlimitedMaxInlinedSourceSize = 100000;
   static const int kUnlimitedMaxInlinedNodes = 10000;
   static const int kUnlimitedMaxInlinedNodesCumulative = 10000;
 
+  // Maximum depth and total number of elements and properties for literal
+  // graphs to be considered for fast deep-copying.
+  static const int kMaxLiteralDepth = 3;

[Michael Starzinger, 2013/04/03 09:23:23]

We should name this "kMaxFastLiteralDepth" and "kMaxFastLiteralProperties" I
think.

[Hannes Payer (out of office), 2013/04/08 11:03:00]

Done.

+  static const int kMaxLiteralProperties = 8;
+
   // Simple accessors.
   void set_function_state(FunctionState* state) { function_state_ = state; }
 
   AstContext* ast_context() const { return ast_context_; }
   void set_ast_context(AstContext* context) { ast_context_ = context; }
 
   // Accessors forwarded to the function state.
   CompilationInfo* info() const {
     return function_state()->compilation_info();
   }
@@ skipping 250 matching lines @@
                                            HValue* value,
                                            Handle<Map> map);
   HInstruction* BuildStoreKeyedGeneric(HValue* object,
                                        HValue* key,
                                        HValue* value);
 
   HValue* BuildContextChainWalk(Variable* var);
 
   HInstruction* BuildThisFunction();
 
+  HInstruction* BuildFastLiteral(HValue* context,
+                                 Handle<JSObject> boilerplate_object,
+                                 int size,
+                                 AllocationSiteMode mode,
+                                 BailoutId id);
+
+  void BuildEmitDeepCopy(Handle<JSObject> object,
+                         HInstruction* result,
+                         HInstruction* source,
+                         int* offset,
+                         AllocationSiteMode mode,
+                         BailoutId id);
+
   void AddCheckPrototypeMaps(Handle<JSObject> holder,
                              Handle<Map> receiver_map);
 
   void AddCheckConstantFunction(Handle<JSObject> holder,
                                 HValue* receiver,
                                 Handle<Map> receiver_map);
 
   bool MatchRotateRight(HValue* left,
                         HValue* right,
                         HValue** operand,
@@ skipping 255 matching lines @@
   EmbeddedVector<char, 64> filename_;
   HeapStringAllocator string_allocator_;
   StringStream trace_;
   int indent_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_