Introduce a stack-allocated structure to encapsulate compile-time information.

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 74c7ffb1719dfa202c7478593749521d1b006f19..0661f348027ac366c79b56aec45f3e4a1a2c94e2 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -35,6 +35,31 @@
 namespace v8 {
 namespace internal {
 
+// CompilationInfo encapsulates some information known at compile time.
+class CompilationInfo BASE_EMBEDDED {
+ public:
+  CompilationInfo(Handle<SharedFunctionInfo> shared_info,
+                  Handle<Object> receiver,
+                  int loop_nesting)
+      : shared_info_(shared_info),
+        receiver_(receiver_),
+        loop_nesting_(loop_nesting) {
+  }
+
+  Handle<SharedFunctionInfo> shared_info() { return shared_info_; }
+
+  bool has_receiver() { return !receiver_.is_null(); }
+  Handle<Object> receiver() { return receiver_; }
+
+  int loop_nesting() { return loop_nesting_; }
+
+ private:
+  Handle<SharedFunctionInfo> shared_info_;
+  Handle<Object> receiver_;
+  int loop_nesting_;
+};
+
+
 // The V8 compiler
 //
 // General strategy: Source code is translated into an anonymous function w/o
@@ -70,9 +95,7 @@ class Compiler : public AllStatic {
   // Compile from function info (used for lazy compilation). Returns
   // true on success and false if the compilation resulted in a stack
   // overflow.
-  static bool CompileLazy(Handle<SharedFunctionInfo> shared,
-                          Handle<Object> receiver,
-                          int loop_nesting);
+  static bool CompileLazy(CompilationInfo* info);
 
   // Compile a function boilerplate object (the function is possibly
   // lazily compiled). Called recursively from a backend code