[turbofan] add ForTesting to pipeline entry points that are for testing only.

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/linkage.h"
 #include "src/compiler/pipeline.h"
 
 namespace v8 {
@@ skipping 17 matching lines @@
     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(zone,
-                    Linkage::GetSimplifiedCDescriptor(zone, machine_sig_));
-    Pipeline pipeline(&info);
-    code_ = pipeline.GenerateCodeForMachineGraph(&linkage, graph_);
+    CallDescriptor* desc =
+        Linkage::GetSimplifiedCDescriptor(zone, machine_sig_);
+    code_ = Pipeline::GenerateCodeForTesting(desc, graph_);
   }
   return code_.ToHandleChecked()->entry();
 }
 
 
 Node* MachineCallHelper::Parameter(size_t index) {
   DCHECK_NE(NULL, parameters_);
   DCHECK(index < parameter_count());
   return parameters_[index];
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8