Eagerly extract stack limit from Isolate in InitializeAstVisitor()

src/interpreter/bytecode-generator.h

Index: src/interpreter/bytecode-generator.h
diff --git a/src/interpreter/bytecode-generator.h b/src/interpreter/bytecode-generator.h
index 2fe8b324d8cc539cd7f952631373b2b8845e9a1c..a877616724bd135b3c88f6dc8f37da2db59828ad 100644
--- a/src/interpreter/bytecode-generator.h
+++ b/src/interpreter/bytecode-generator.h
@@ -49,6 +49,8 @@ class BytecodeGenerator : public AstVisitor {
 
   inline BytecodeArrayBuilder* builder() { return &builder_; }
 
+  inline Isolate* isolate() const { return isolate_; }
+
   inline Scope* scope() const { return scope_; }
   inline void set_scope(Scope* scope) { scope_ = scope; }
   inline CompilationInfo* info() const { return info_; }
@@ -66,6 +68,7 @@ class BytecodeGenerator : public AstVisitor {
   Strength language_mode_strength() const;
   int feedback_index(FeedbackVectorSlot slot) const;
 
+  Isolate* isolate_;
   BytecodeArrayBuilder builder_;
   CompilationInfo* info_;
   Scope* scope_;