[turbofan] Inline calls to CPP builtins

src/builtins/builtins.h

Index: src/builtins/builtins.h
diff --git a/src/builtins/builtins.h b/src/builtins/builtins.h
index 10d6f21705b3c99e1f8e039d0cd5722d08192449..b71b25ac3eb03b7431cdb20e593b8ff26019ca19 100644
--- a/src/builtins/builtins.h
+++ b/src/builtins/builtins.h
@@ -600,7 +600,15 @@ class Builtins {
     return reinterpret_cast<Address>(&builtins_[name]);
   }
 
-  const char* name(int index);
+  static const char* name(int index);
+
+  // Returns the C++ entry point for builtins implemented in C++, and the null
+  // Address otherwise.
+  static Address CppEntryOf(int index);
+
+  static bool IsCpp(int index);
+  static bool IsApi(int index);
+  static bool HasCppImplementation(int index);
 
   bool is_initialized() const { return initialized_; }