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

src/ppc/full-codegen-ppc.cc

Index: src/ppc/full-codegen-ppc.cc
diff --git a/src/ppc/full-codegen-ppc.cc b/src/ppc/full-codegen-ppc.cc
index 78132a06ccfc0050543db143d1e9a9d2b29a05b8..21345e406786aa030028cf39b3bdf7b1dd87385c 100644
--- a/src/ppc/full-codegen-ppc.cc
+++ b/src/ppc/full-codegen-ppc.cc
@@ -3897,6 +3897,28 @@ void FullCodeGenerator::EmitValueOf(CallRuntime* expr) {
 }
 
 
+void FullCodeGenerator::EmitThrowIfNotADate(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  DCHECK_EQ(1, args->length());
+
+  VisitForAccumulatorValue(args->at(0));  // Load the object.
+
+  Label done, not_date_object;
+  Register object = r3;
+  Register result = r3;
+  Register scratch0 = r4;
+
+  __ JumpIfSmi(object, &not_date_object);
+  __ CompareObjectType(object, scratch0, scratch0, JS_DATE_TYPE);
+  __ beq(&done);
+  __ bind(&not_date_object);
+  __ CallRuntime(Runtime::kThrowNotDateError, 0);
+
+  __ bind(&done);
+  context()->Plug(result);
+}
+
+
 void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK(args->length() == 2);
@@ -3905,20 +3927,15 @@ void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
 
   VisitForAccumulatorValue(args->at(0));  // Load the object.
 
-  Label runtime, done, not_date_object;
   Register object = r3;
   Register result = r3;
   Register scratch0 = r11;
   Register scratch1 = r4;
 
-  __ JumpIfSmi(object, &not_date_object);
-  __ CompareObjectType(object, scratch1, scratch1, JS_DATE_TYPE);
-  __ bne(&not_date_object);
-
   if (index->value() == 0) {
     __ LoadP(result, FieldMemOperand(object, JSDate::kValueOffset));
-    __ b(&done);
   } else {
+    Label runtime, done;
     if (index->value() < JSDate::kFirstUncachedField) {
       ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
       __ mov(scratch1, Operand(stamp));
@@ -3936,13 +3953,10 @@ void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
     __ PrepareCallCFunction(2, scratch1);
     __ LoadSmiLiteral(r4, index);
     __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
-    __ b(&done);
+    __ bind(&done);
   }
 
-  __ bind(&not_date_object);
-  __ CallRuntime(Runtime::kThrowNotDateError, 0);
-  __ bind(&done);
-  context()->Plug(r3);
+  context()->Plug(result);
 }