[interpreter] Be explicit when to test BytecodeGraphBuilder.

test/cctest/compiler/function-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_FUNCTION_TESTER_H_
 #define V8_CCTEST_COMPILER_FUNCTION_TESTER_H_
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/scopes.h"
 #include "src/compiler.h"
@@ skipping 170 matching lines @@
     info.MarkAsDeoptimizationEnabled();
 
     CHECK(Parser::ParseStatic(info.parse_info()));
     info.SetOptimizing();
     if (flags_ & CompilationInfo::kFunctionContextSpecializing) {
       info.MarkAsFunctionContextSpecializing();
     }
     if (flags_ & CompilationInfo::kInliningEnabled) {
       info.MarkAsInliningEnabled();
     }
-    if (function->shared()->HasBytecodeArray()) {
+    if (FLAG_turbo_from_bytecode && function->shared()->HasBytecodeArray()) {
       info.MarkAsOptimizeFromBytecode();
     } else {
       CHECK(Compiler::Analyze(info.parse_info()));
       CHECK(Compiler::EnsureDeoptimizationSupport(&info));
     }
 
     Handle<Code> code = Pipeline::GenerateCodeForTesting(&info);
     CHECK(!code.is_null());
     info.dependencies()->Commit(code);
     info.context()->native_context()->AddOptimizedCode(*code);
@@ skipping 33 matching lines @@
     CHECK(!code.is_null());
     function->ReplaceCode(*code);
     return function;
   }
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CCTEST_COMPILER_FUNCTION_TESTER_H_