Implement date library functions in C++.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 6ea42a95f8b97882e013d447c7f846b4da8a1631..11b1157179028e2bc259018d761e2288398367bd 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -7125,8 +7125,7 @@ void HGraphBuilder::GenerateValueOf(CallRuntime* call) {
 void HGraphBuilder::GenerateDateField(CallRuntime* call) {
   ASSERT(call->arguments()->length() == 2);
   ASSERT_NE(NULL, call->arguments()->at(1)->AsLiteral());
-  int index =
-      Smi::cast(*(call->arguments()->at(1)->AsLiteral()->handle()))->value();
+  Smi* index = Smi::cast(*(call->arguments()->at(1)->AsLiteral()->handle()));
   CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
   HValue* date = Pop();
   HDateField* result = new(zone()) HDateField(date, index);
@@ -7176,22 +7175,6 @@ void HGraphBuilder::GenerateSetValueOf(CallRuntime* call) {
 }
 
 
-void HGraphBuilder::GenerateSetDateField(CallRuntime* call) {
-  ASSERT(call->arguments()->length() == 3);
-  ASSERT_NE(NULL, call->arguments()->at(1)->AsLiteral());
-  int index =
-      Smi::cast(*(call->arguments()->at(1)->AsLiteral()->handle()))->value();
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(2)));
-  HValue* value = Pop();
-  HValue* date = Pop();
-  HValue* context = environment()->LookupContext();
-  HSetDateField* result =
-      new(zone()) HSetDateField(context, date, value, index);
-  return ast_context()->ReturnInstruction(result, call->id());
-}
-
-
 // Fast support for charCodeAt(n).
 void HGraphBuilder::GenerateStringCharCodeAt(CallRuntime* call) {
   ASSERT(call->arguments()->length() == 2);