[builtins] Refactor the remaining Date builtins.

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

Index: src/crankshaft/mips/lithium-codegen-mips.cc
diff --git a/src/crankshaft/mips/lithium-codegen-mips.cc b/src/crankshaft/mips/lithium-codegen-mips.cc
index c039d41fd7c2b2c40476b050bb4bd785a323ac4c..512350f139f2574f7310cd0cbec2e1af9da6bfe7 100644
--- a/src/crankshaft/mips/lithium-codegen-mips.cc
+++ b/src/crankshaft/mips/lithium-codegen-mips.cc
@@ -1659,39 +1659,6 @@ void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) {
 }
 
 
-void LCodeGen::DoDateField(LDateField* instr) {
-  Register object = ToRegister(instr->date());
-  Register result = ToRegister(instr->result());
-  Register scratch = ToRegister(instr->temp());
-  Smi* index = instr->index();
-  DCHECK(object.is(a0));
-  DCHECK(result.is(v0));
-  DCHECK(!scratch.is(scratch0()));
-  DCHECK(!scratch.is(object));
-
-  if (index->value() == 0) {
-    __ lw(result, FieldMemOperand(object, JSDate::kValueOffset));
-  } else {
-    Label runtime, done;
-    if (index->value() < JSDate::kFirstUncachedField) {
-      ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
-      __ li(scratch, Operand(stamp));
-      __ lw(scratch, MemOperand(scratch));
-      __ lw(scratch0(), FieldMemOperand(object, JSDate::kCacheStampOffset));
-      __ Branch(&runtime, ne, scratch, Operand(scratch0()));
-      __ lw(result, FieldMemOperand(object, JSDate::kValueOffset +
-                                            kPointerSize * index->value()));
-      __ jmp(&done);
-    }
-    __ bind(&runtime);
-    __ PrepareCallCFunction(2, scratch);
-    __ li(a1, Operand(index));
-    __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
-    __ bind(&done);
-  }
-}
-
-
 MemOperand LCodeGen::BuildSeqStringOperand(Register string,
                                            LOperand* index,
                                            String::Encoding encoding) {