Direct call C++ functions

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
===================================================================
--- src/ia32/macro-assembler-ia32.h	(revision 3911)
+++ src/ia32/macro-assembler-ia32.h	(working copy)
@@ -366,13 +366,17 @@
   // Convenience function: Same as above, but takes the fid instead.
   Object* TryCallRuntime(Runtime::FunctionId id, int num_arguments);
 
-  // Tail call of a runtime routine (jump).
-  // Like JumpToRuntime, but also takes care of passing the number
+  // Tail call of a runtime routine (jump or equivalent if jump is not
+  // possible). Like JumpToRuntime, but also takes care of passing the number
   // of arguments.
-  void TailCallRuntime(const ExternalReference& ext,
+  void TailCallRuntime(Runtime::FunctionId id,
                        int num_arguments,
                        int result_size);
 
+  void TailCallExternalReference(const ExternalReference& ext,
+                                 int num_arguments,
+                                 int result_size);
+
   void PushHandleScope(Register scratch);
 
   // Pops a handle scope using the specified scratch register and
@@ -484,6 +488,8 @@
   Object* PopHandleScopeHelper(Register saved,
                                Register scratch,
                                bool gc_allowed);
+
+  void DirectInvokeRuntime(Runtime::Function* f, InvokeFlag flag);
 };