Hydrogen stubs for array constructors

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 5e69661b4d8b92d1ad9c986ef49a129d7deebf42..c50017cd8c1cc2fa81c63748aae5c41b9368b91d 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -143,6 +143,14 @@ class CompilationInfo {
     return SavesCallerDoubles::decode(flags_);
   }
 
+  void MarkAsStubThatUsesArguments() {
+    flags_ |= StubThatUsesArguments::encode(true);
+  }
+
+  bool stub_that_uses_arguments() const {
+    return StubThatUsesArguments::decode(flags_);
+  }
+
   void SetParseRestriction(ParseRestriction restriction) {
     flags_ = ParseRestricitonField::update(flags_, restriction);
   }
@@ -300,6 +308,8 @@ class CompilationInfo {
   class SavesCallerDoubles: public BitField<bool, 12, 1> {};
   // If the set of valid statements is restricted.
   class ParseRestricitonField: public BitField<ParseRestriction, 13, 1> {};
+  // Is this a hydrogen stub that insists on using arguments?
+  class StubThatUsesArguments: public BitField<bool, 14, 1> {};
 
   unsigned flags_;