[interpreter] Add ability to preserve bytecode.

src/objects-inl.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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 6087 matching lines @@
   DCHECK(code()->gc_metadata() == NULL && value->gc_metadata() == NULL);
 #ifdef DEBUG
   Code::VerifyRecompiledCode(code(), value);
 #endif  // DEBUG
 
   set_code(value);
 
   if (is_compiled()) set_never_compiled(false);
 }
 
+bool SharedFunctionInfo::HasBaselineCode() const {
+  return code()->kind() == Code::FUNCTION;
+}
 
 ScopeInfo* SharedFunctionInfo::scope_info() const {
   return reinterpret_cast<ScopeInfo*>(READ_FIELD(this, kScopeInfoOffset));
 }
 
 
 void SharedFunctionInfo::set_scope_info(ScopeInfo* value,
                                         WriteBarrierMode mode) {
   WRITE_FIELD(this, kScopeInfoOffset, reinterpret_cast<Object*>(value));
   CONDITIONAL_WRITE_BARRIER(GetHeap(),
                             this,
                             kScopeInfoOffset,
                             reinterpret_cast<Object*>(value),
                             mode);
 }
 
-
-bool SharedFunctionInfo::is_compiled() {
+bool SharedFunctionInfo::is_compiled() const {
   Builtins* builtins = GetIsolate()->builtins();
   DCHECK(code() != builtins->builtin(Builtins::kCompileOptimizedConcurrent));
   DCHECK(code() != builtins->builtin(Builtins::kCompileOptimized));
   DCHECK(code() != builtins->builtin(Builtins::kCompileBaseline));
   return code() != builtins->builtin(Builtins::kCompileLazy);
 }
 
 
 bool SharedFunctionInfo::has_simple_parameters() {
   return scope_info()->HasSimpleParameters();
 }
 
 
 bool SharedFunctionInfo::HasDebugInfo() {
   bool has_debug_info = debug_info()->IsStruct();
   DCHECK(!has_debug_info || HasDebugCode());
   return has_debug_info;
 }
 
 
 DebugInfo* SharedFunctionInfo::GetDebugInfo() {
   DCHECK(HasDebugInfo());
   return DebugInfo::cast(debug_info());
 }
 
 
 bool SharedFunctionInfo::HasDebugCode() {
   return HasBytecodeArray() ||
-         (code()->kind() == Code::FUNCTION && code()->has_debug_break_slots());
+         (HasBaselineCode() && code()->has_debug_break_slots());
 }
 
 
 bool SharedFunctionInfo::IsApiFunction() {
   return function_data()->IsFunctionTemplateInfo();
 }
 
 
 FunctionTemplateInfo* SharedFunctionInfo::get_api_func_data() {
   DCHECK(IsApiFunction());
@@ skipping 2021 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_