[builtins] Refactor the remaining Date builtins.

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

Index: src/crankshaft/ppc/lithium-codegen-ppc.cc
diff --git a/src/crankshaft/ppc/lithium-codegen-ppc.cc b/src/crankshaft/ppc/lithium-codegen-ppc.cc
index 92f43672a73403a818c550966bff3b9434c84031..4c035392ab649cee2fc2b7ac0eb498e90608b5d2 100644
--- a/src/crankshaft/ppc/lithium-codegen-ppc.cc
+++ b/src/crankshaft/ppc/lithium-codegen-ppc.cc
@@ -1813,41 +1813,6 @@ 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(result));
-  DCHECK(object.is(r3));
-  DCHECK(!scratch.is(scratch0()));
-  DCHECK(!scratch.is(object));
-
-  if (index->value() == 0) {
-    __ LoadP(result, FieldMemOperand(object, JSDate::kValueOffset));
-  } else {
-    Label runtime, done;
-    if (index->value() < JSDate::kFirstUncachedField) {
-      ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
-      __ mov(scratch, Operand(stamp));
-      __ LoadP(scratch, MemOperand(scratch));
-      __ LoadP(scratch0(), FieldMemOperand(object, JSDate::kCacheStampOffset));
-      __ cmp(scratch, scratch0());
-      __ bne(&runtime);
-      __ LoadP(result,
-               FieldMemOperand(object, JSDate::kValueOffset +
-                                           kPointerSize * index->value()));
-      __ b(&done);
-    }
-    __ bind(&runtime);
-    __ PrepareCallCFunction(2, scratch);
-    __ LoadSmiLiteral(r4, index);
-    __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
-    __ bind(&done);
-  }
-}
-
-
 MemOperand LCodeGen::BuildSeqStringOperand(Register string, LOperand* index,
                                            String::Encoding encoding) {
   if (index->IsConstantOperand()) {