Revert of [Intepreter] Always use BytecodeGraphBuilder when --turbo-from-bytecode

src/compiler.h

 // Copyright 2012 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_COMPILER_H_
 #define V8_COMPILER_H_
 
 #include "src/allocation.h"
 #include "src/ast/ast.h"
 #include "src/bailout-reason.h"
@@ skipping 19 matching lines @@
 // the object heap should be kept inside this class.
 //
 // General strategy: Scripts are translated into anonymous functions w/o
 // parameters which then can be executed. If the source code contains other
 // functions, they might be compiled and allocated as part of the compilation
 // of the source code or deferred for lazy compilation at a later point.
 class Compiler : public AllStatic {
  public:
   enum ClearExceptionFlag { KEEP_EXCEPTION, CLEAR_EXCEPTION };
   enum ConcurrencyMode { NOT_CONCURRENT, CONCURRENT };
-  enum CompilationTier { INTERPRETED, BASELINE, OPTIMIZED };
 
   // ===========================================================================
   // The following family of methods ensures a given function is compiled. The
   // general contract is that failures will be reported by returning {false},
   // whereas successful compilation ensures the {is_compiled} predicate on the
   // given function holds (except for live-edit, which compiles the world).
 
   static bool Compile(Handle<JSFunction> function, ClearExceptionFlag flag);
   static bool CompileBaseline(Handle<JSFunction> function);
   static bool CompileOptimized(Handle<JSFunction> function, ConcurrencyMode);
   static bool CompileDebugCode(Handle<JSFunction> function);
   static bool CompileDebugCode(Handle<SharedFunctionInfo> shared);
   static MaybeHandle<JSArray> CompileForLiveEdit(Handle<Script> script);
 
   // Generate and install code from previously queued compilation job.
   static void FinalizeCompilationJob(CompilationJob* job);
 
   // Give the compiler a chance to perform low-latency initialization tasks of
   // the given {function} on its instantiation. Note that only the runtime will
   // offer this chance, optimized closure instantiation will not call this.
   static void PostInstantiation(Handle<JSFunction> function, PretenureFlag);
 
   // Parser::Parse, then Compiler::Analyze.
   static bool ParseAndAnalyze(ParseInfo* info);
   // Rewrite, analyze scopes, and renumber.
   static bool Analyze(ParseInfo* info);
   // Adds deoptimization support, requires ParseAndAnalyze.
   static bool EnsureDeoptimizationSupport(CompilationInfo* info);
-  // Ensures that bytecode is generated, calls ParseAndAnalyze internally.
-  static bool EnsureBytecode(CompilationInfo* info);
-
-  // The next compilation tier which the function should  be compiled to for
-  // optimization. This is used as a hint by the runtime profiler.
-  static CompilationTier NextCompilationTier(JSFunction* function);
 
   // ===========================================================================
   // The following family of methods instantiates new functions for scripts or
   // function literals. The decision whether those functions will be compiled,
   // is left to the discretion of the compiler.
   //
   // Please note this interface returns shared function infos.  This means you
   // need to call Factory::NewFunctionFromSharedFunctionInfo before you have a
   // real function with a context.
 
@@ skipping 499 matching lines @@
   MUST_USE_RESULT Status SetLastStatus(Status status) {
     last_status_ = status;
     return last_status_;
   }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_H_