[turbofan] GraphBuilderTester uses --print-opt-code.

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

 // 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.
 
 #ifndef V8_CCTEST_COMPILER_GRAPH_BUILDER_TESTER_H_
 #define V8_CCTEST_COMPILER_GRAPH_BUILDER_TESTER_H_
 
 #include "src/v8.h"
 #include "test/cctest/cctest.h"
 
@@ skipping 256 matching lines @@
     return result;
   }
 
   virtual byte* Generate() {
     if (!Pipeline::SupportedBackend()) return NULL;
     if (code_.is_null()) {
       Zone* zone = graph()->zone();
       CallDescriptor* desc =
           Linkage::GetSimplifiedCDescriptor(zone, this->csig_);
       code_ = Pipeline::GenerateCodeForTesting(main_isolate(), desc, graph());
+#ifdef ENABLE_DISASSEMBLER
+      if (!code_.is_null() && FLAG_print_opt_code) {
+        OFStream os(stdout);
+        code_.ToHandleChecked()->Disassemble("test code", os);
+      }
+#endif
     }
     return code_.ToHandleChecked()->entry();
   }
 
   void InitParameters() {
     int param_count = static_cast<int>(parameter_count());
     for (int i = 0; i < param_count; ++i) {
       parameters_[i] = this->NewNode(common()->Parameter(i), graph()->start());
     }
   }
 
   size_t parameter_count() const { return this->csig_->parameter_count(); }
 
  private:
   Node* effect_;
   Node* return_;
   Node** parameters_;
   MaybeHandle<Code> code_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CCTEST_COMPILER_GRAPH_BUILDER_TESTER_H_