Disable code generation in tests that use GraphBuilderTester on platforms that have no TF backend.

test/cctest/compiler/graph-builder-tester.cc

 // Copyright 2014 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.
 
 #include "test/cctest/compiler/graph-builder-tester.h"
 #include "src/compiler/pipeline.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 13 matching lines @@
   if (parameter_count() == 0) return;
   parameters_ = graph_->zone()->NewArray<Node*>(parameter_count());
   for (int i = 0; i < parameter_count(); ++i) {
     parameters_[i] = builder->NewNode(common->Parameter(i), graph_->start());
   }
 }
 
 
 byte* MachineCallHelper::Generate() {
   DCHECK(parameter_count() == 0 || parameters_ != NULL);
+  if (!Pipeline::SupportedBackend()) return NULL;
   if (code_.is_null()) {
     Zone* zone = graph_->zone();
     CompilationInfo info(zone->isolate(), zone);
     Linkage linkage(&info, call_descriptor_builder_->BuildCallDescriptor(zone));
     Pipeline pipeline(&info);
     code_ = pipeline.GenerateCodeForMachineGraph(&linkage, graph_);
   }
   return code_.ToHandleChecked()->entry();
 }
 
@@ skipping 11 matching lines @@
 
 Node* MachineCallHelper::Parameter(int offset) {
   DCHECK_NE(NULL, parameters_);
   DCHECK(0 <= offset && offset < parameter_count());
   return parameters_[offset];
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8