Introduce IsUndefined(Isolate*) and IsTheHole(Isolate*)

src/full-codegen/s390/full-codegen-s390.cc

Index: src/full-codegen/s390/full-codegen-s390.cc
diff --git a/src/full-codegen/s390/full-codegen-s390.cc b/src/full-codegen/s390/full-codegen-s390.cc
index 791a2a822c30e2adce1ad672dfd5b27a7ebf7717..c9839dc9f9b83bed3c501aabc9d313987a7a86ec 100644
--- a/src/full-codegen/s390/full-codegen-s390.cc
+++ b/src/full-codegen/s390/full-codegen-s390.cc
@@ -512,8 +512,9 @@ void FullCodeGenerator::StackValueContext::Plug(Handle<Object> lit) const {
 void FullCodeGenerator::TestContext::Plug(Handle<Object> lit) const {
   codegen()->PrepareForBailoutBeforeSplit(condition(), true, true_label_,
                                           false_label_);
-  DCHECK(lit->IsNull() || lit->IsUndefined() || !lit->IsUndetectable());
-  if (lit->IsUndefined() || lit->IsNull() || lit->IsFalse()) {
+  DCHECK(lit->IsNull() || lit->IsUndefined(isolate()) ||
+         !lit->IsUndetectable());
+  if (lit->IsUndefined(isolate()) || lit->IsNull() || lit->IsFalse()) {
     if (false_label_ != fall_through_) __ b(false_label_);
   } else if (lit->IsTrue() || lit->IsJSObject()) {
     if (true_label_ != fall_through_) __ b(true_label_);