Revert of Replace all remaining Oddball checks with new function

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

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 494 matching lines @@
 
 void FullCodeGenerator::StackValueContext::Plug(Handle<Object> lit) const {
   // Immediates cannot be pushed directly.
   __ mov(result_register(), Operand(lit));
   codegen()->PushOperand(result_register());
 }
 
 void FullCodeGenerator::TestContext::Plug(Handle<Object> lit) const {
   codegen()->PrepareForBailoutBeforeSplit(condition(), true, true_label_,
                                           false_label_);
-  DCHECK(lit->IsNull(isolate()) || lit->IsUndefined(isolate()) ||
+  DCHECK(lit->IsNull() || lit->IsUndefined(isolate()) ||
          !lit->IsUndetectable());
-  if (lit->IsUndefined(isolate()) || lit->IsNull(isolate()) ||
-      lit->IsFalse(isolate())) {
+  if (lit->IsUndefined(isolate()) || lit->IsNull() || lit->IsFalse()) {
     if (false_label_ != fall_through_) __ b(false_label_);
-  } else if (lit->IsTrue(isolate()) || lit->IsJSObject()) {
+  } else if (lit->IsTrue() || lit->IsJSObject()) {
     if (true_label_ != fall_through_) __ b(true_label_);
   } else if (lit->IsString()) {
     if (String::cast(*lit)->length() == 0) {
       if (false_label_ != fall_through_) __ b(false_label_);
     } else {
       if (true_label_ != fall_through_) __ b(true_label_);
     }
   } else if (lit->IsSmi()) {
     if (Smi::cast(*lit)->value() == 0) {
       if (false_label_ != fall_through_) __ b(false_label_);
@@ skipping 3178 matching lines @@
   DCHECK(kOSRBranchInstruction == br_instr);
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OnStackReplacement()->entry());
   return ON_STACK_REPLACEMENT;
 }
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_S390