[builtins] Refactor the remaining Date builtins.

src/crankshaft/x64/lithium-codegen-x64.cc

Index: src/crankshaft/x64/lithium-codegen-x64.cc
diff --git a/src/crankshaft/x64/lithium-codegen-x64.cc b/src/crankshaft/x64/lithium-codegen-x64.cc
index c758812b163b785683d6e01e4827732f44814406..30d47c8da09e2beb3656c8f13e5a9964edf3f95b 100644
--- a/src/crankshaft/x64/lithium-codegen-x64.cc
+++ b/src/crankshaft/x64/lithium-codegen-x64.cc
@@ -1667,44 +1667,6 @@ void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) {
 }
 
 
-void LCodeGen::DoDateField(LDateField* instr) {
-  Register object = ToRegister(instr->date());
-  Register result = ToRegister(instr->result());
-  Smi* index = instr->index();
-  DCHECK(object.is(result));
-  DCHECK(object.is(rax));
-
-  if (FLAG_debug_code) {
-    __ AssertNotSmi(object);
-    __ CmpObjectType(object, JS_DATE_TYPE, kScratchRegister);
-    __ Check(equal, kOperandIsNotADate);
-  }
-
-  if (index->value() == 0) {
-    __ movp(result, FieldOperand(object, JSDate::kValueOffset));
-  } else {
-    Label runtime, done;
-    if (index->value() < JSDate::kFirstUncachedField) {
-      ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
-      Operand stamp_operand = __ ExternalOperand(stamp);
-      __ movp(kScratchRegister, stamp_operand);
-      __ cmpp(kScratchRegister, FieldOperand(object,
-                                             JSDate::kCacheStampOffset));
-      __ j(not_equal, &runtime, Label::kNear);
-      __ movp(result, FieldOperand(object, JSDate::kValueOffset +
-                                           kPointerSize * index->value()));
-      __ jmp(&done, Label::kNear);
-    }
-    __ bind(&runtime);
-    __ PrepareCallCFunction(2);
-    __ movp(arg_reg_1, object);
-    __ Move(arg_reg_2, index, Assembler::RelocInfoNone());
-    __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
-    __ bind(&done);
-  }
-}
-
-
 Operand LCodeGen::BuildSeqStringOperand(Register string,
                                         LOperand* index,
                                         String::Encoding encoding) {