Preliminary support for block contexts in hydrogen.

src/ast.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_AST_H_
 #define V8_AST_H_
 
 #include "src/v8.h"
 
 #include "src/assembler.h"
@@ skipping 423 matching lines @@
  public:
   DECLARE_NODE_TYPE(Block)
 
   void AddStatement(Statement* statement, Zone* zone) {
     statements_.Add(statement, zone);
   }
 
   ZoneList<Statement*>* statements() { return &statements_; }
   bool is_initializer_block() const { return is_initializer_block_; }
 
+  BailoutId DeclsId() const { return decls_id_; }
+
   virtual bool IsJump() const V8_OVERRIDE {
     return !statements_.is_empty() && statements_.last()->IsJump()
         && labels() == NULL;  // Good enough as an approximation...
   }
 
   Scope* scope() const { return scope_; }
   void set_scope(Scope* scope) { scope_ = scope; }
 
  protected:
   Block(Zone* zone,
         ZoneStringList* labels,
         int capacity,
         bool is_initializer_block,
         int pos)
       : BreakableStatement(zone, labels, TARGET_FOR_NAMED_ONLY, pos),
         statements_(capacity, zone),
         is_initializer_block_(is_initializer_block),
+        decls_id_(GetNextId(zone)),
         scope_(NULL) {
   }
 
  private:
   ZoneList<Statement*> statements_;
   bool is_initializer_block_;
+  const BailoutId decls_id_;
   Scope* scope_;
 };
 
 
 class Declaration : public AstNode {
  public:
   VariableProxy* proxy() const { return proxy_; }
   VariableMode mode() const { return mode_; }
   Scope* scope() const { return scope_; }
   virtual InitializationFlag initialization() const = 0;
@@ skipping 2857 matching lines @@
 
  private:
   Zone* zone_;
   Visitor visitor_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_