[date] Use explicit control flow to replace %_ThrowIfNotADate.

src/x64/full-codegen-x64.cc

Index: src/x64/full-codegen-x64.cc
diff --git a/src/x64/full-codegen-x64.cc b/src/x64/full-codegen-x64.cc
index beed6f26b8141d95194dab75e06d249cce3cd66d..859efecd6ee6d6aae3be31511c9478e4d31a4a09 100644
--- a/src/x64/full-codegen-x64.cc
+++ b/src/x64/full-codegen-x64.cc
@@ -3789,25 +3789,25 @@ void FullCodeGenerator::EmitValueOf(CallRuntime* expr) {
 }
 
 
-void FullCodeGenerator::EmitThrowIfNotADate(CallRuntime* expr) {
+void FullCodeGenerator::EmitIsDate(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK_EQ(1, args->length());
 
-  VisitForAccumulatorValue(args->at(0));  // Load the object.
+  VisitForAccumulatorValue(args->at(0));
 
-  Register object = rax;
-  Register result = rax;
-  Register scratch = rcx;
+  Label materialize_true, materialize_false;
+  Label* if_true = nullptr;
+  Label* if_false = nullptr;
+  Label* fall_through = nullptr;
+  context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
+                         &if_false, &fall_through);
 
-  Label done, not_date_object;
-  __ JumpIfSmi(object, &not_date_object, Label::kNear);
-  __ CmpObjectType(object, JS_DATE_TYPE, scratch);
-  __ j(equal, &done, Label::kNear);
-  __ bind(&not_date_object);
-  __ CallRuntime(Runtime::kThrowNotDateError, 0);
+  __ JumpIfSmi(rax, if_false);
+  __ CmpObjectType(rax, JS_DATE_TYPE, rbx);
+  PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
+  Split(equal, if_true, if_false, fall_through);
 
-  __ bind(&done);
-  context()->Plug(result);
+  context()->Plug(if_true, if_false);
 }