[interpreter] Fix --print-ast dumping the AST twice.

src/interpreter/interpreter.cc

 // Copyright 2015 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 "src/interpreter/interpreter.h"
 
 #include <fstream>
 #include <memory>
 
 #include "src/ast/prettyprinter.h"
@@ skipping 145 matching lines @@
 
 // static
 int Interpreter::InterruptBudget() {
   return FLAG_interrupt_budget * kCodeSizeMultiplier;
 }
 
 InterpreterCompilationJob::InterpreterCompilationJob(CompilationInfo* info)
     : CompilationJob(info->isolate(), info, "Ignition"), generator_(info) {}
 
 InterpreterCompilationJob::Status InterpreterCompilationJob::PrepareJobImpl() {
-  if (FLAG_print_bytecode || FLAG_print_ast) {
+  CodeGenerator::MakeCodePrologue(info(), "interpreter");
+  if (FLAG_print_bytecode) {
     OFStream os(stdout);
     std::unique_ptr<char[]> name = info()->GetDebugName();
     os << "[generating bytecode for function: " << info()->GetDebugName().get()
        << "]" << std::endl
        << std::flush;
   }
 
-#ifdef DEBUG
-  if (info()->parse_info() && FLAG_print_ast) {
-    OFStream os(stdout);
-    os << "--- AST ---" << std::endl
-       << AstPrinter(info()->isolate()).PrintProgram(info()->literal())
-       << std::endl
-       << std::flush;
-  }
-#endif  // DEBUG
-
   return SUCCEEDED;
 }
 
 InterpreterCompilationJob::Status InterpreterCompilationJob::ExecuteJobImpl() {
   // TODO(5203): These timers aren't thread safe, move to using the CompilerJob
   // timers.
   RuntimeCallTimerScope runtimeTimer(info()->isolate(),
                                      &RuntimeCallStats::CompileIgnition);
   TimerEventScope<TimerEventCompileIgnition> timer(info()->isolate());
   TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.CompileIgnition");
 
   generator()->GenerateBytecode(stack_limit());
 
   if (generator()->HasStackOverflow()) {
     return FAILED;
   }
   return SUCCEEDED;
 }
 
 InterpreterCompilationJob::Status InterpreterCompilationJob::FinalizeJobImpl() {
   Handle<BytecodeArray> bytecodes = generator()->FinalizeBytecode(isolate());
   if (generator()->HasStackOverflow()) {
     return FAILED;
   }
 
-  CodeGenerator::MakeCodePrologue(info(), "interpreter");
-
   if (FLAG_print_bytecode) {
     OFStream os(stdout);
     bytecodes->Print(os);
     os << std::flush;
   }
 
   info()->SetBytecodeArray(bytecodes);
   info()->SetCode(info()->isolate()->builtins()->InterpreterEntryTrampoline());
   return SUCCEEDED;
 }
@@ skipping 2569 matching lines @@
   __ StoreObjectField(generator, JSGeneratorObject::kContinuationOffset,
       __ SmiTag(new_state));
   __ SetAccumulator(old_state);
 
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8