Eagerly extract stack limit from Isolate in InitializeAstVisitor()

src/full-codegen/full-codegen.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_FULL_CODEGEN_FULL_CODEGEN_H_
 #define V8_FULL_CODEGEN_FULL_CODEGEN_H_
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/ast.h"
@@ skipping 670 matching lines @@
     DCHECK(loop_depth_ > 0);
     loop_depth_--;
   }
 
   MacroAssembler* masm() const { return masm_; }
 
   class ExpressionContext;
   const ExpressionContext* context() { return context_; }
   void set_new_context(const ExpressionContext* context) { context_ = context; }
 
+  Isolate* isolate() const { return info_->isolate(); }
   Handle<Script> script() { return info_->script(); }
   bool is_eval() { return info_->is_eval(); }
   bool is_native() { return info_->is_native(); }
   LanguageMode language_mode() { return literal()->language_mode(); }
   bool has_simple_parameters() { return info_->has_simple_parameters(); }
   FunctionLiteral* literal() const { return info_->literal(); }
   Scope* scope() { return scope_; }
 
   static Register result_register();
   static Register context_register();
@@ skipping 373 matching lines @@
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FULL_CODEGEN_FULL_CODEGEN_H_