Generate a custom OSR entrypoint for OSR compiles on all platforms, and transition to optimized cod…

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 8484cd1eb65e6faf7aec09670a40de9345a04260..ffd2cc203a4266ae87548b3db144a8b3665304a7 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -551,9 +551,6 @@ class HEnvironment: public ZoneObject {
   void set_entry(HEnterInlined* entry) { entry_ = entry; }
 
   int length() const { return values_.length(); }
-  bool is_special_index(int i) const {
-    return i >= parameter_count() && i < parameter_count() + specials_count();
-  }
 
   int first_expression_index() const {
     return parameter_count() + specials_count() + local_count();
@@ -672,8 +669,15 @@ class HEnvironment: public ZoneObject {
   }
 
   bool is_local_index(int i) const {
-    return i >= first_local_index() &&
-           i < first_expression_index();
+    return i >= first_local_index() && i < first_expression_index();
+  }
+
+  bool is_parameter_index(int i) const {
+    return i >= 0 && i < parameter_count();
+  }
+
+  bool is_special_index(int i) const {
+    return i >= parameter_count() && i < parameter_count() + specials_count();
   }
 
   void PrintTo(StringStream* stream);