[date] Refactor the %_DateField intrinsic to be optimizable.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 69bf82edac8faf4aa2267526ab0cb4b2007a8827..9456f2fc7229ce96446340151acaf4111dec4345 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1793,7 +1793,7 @@ LInstruction* LChunkBuilder::DoMapEnumLength(HMapEnumLength* instr) {
 LInstruction* LChunkBuilder::DoDateField(HDateField* instr) {
   LOperand* object = UseFixed(instr->value(), rax);
   LDateField* result = new(zone()) LDateField(object, instr->index());
-  return MarkAsCall(DefineFixed(result, rax), instr, CAN_DEOPTIMIZE_EAGERLY);
+  return MarkAsCall(DefineFixed(result, rax), instr, CANNOT_DEOPTIMIZE_EAGERLY);
 }