Debugger: always include deoptimization support for debug code.

src/compiler.cc

 // 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.
 
 #include "src/compiler.h"
 
 #include <algorithm>
 
 #include "src/ast-numbering.h"
 #include "src/bootstrapper.h"
@@ skipping 951 matching lines @@
     // The existing unoptimized code was replaced with the new one.
     RecordFunctionCompilation(Logger::LAZY_COMPILE_TAG, &unoptimized, shared);
   }
   return true;
 }
 
 
 MaybeHandle<Code> CompileForDebugging(CompilationInfo* info) {
   info->MarkAsDebug();
   VMState<COMPILER> state(info->isolate());
-  if (info->shared_info()->is_compiled()) {
-    if (info->shared_info()->code()->is_compiled_optimizable()) {
-      info->EnableDeoptimizationSupport();
-    } else {
-      info->MarkNonOptimizable();
-    }
-  }
   MaybeHandle<Code> maybe_new_code = GetUnoptimizedCodeCommon(info);
   Handle<Code> new_code;
   if (!maybe_new_code.ToHandle(&new_code)) {
     info->isolate()->clear_pending_exception();
   }
   return maybe_new_code;
 }
 
 
 MaybeHandle<Code> Compiler::GetDebugCode(Handle<JSFunction> function) {
@@ skipping 636 matching lines @@
 
 
 #if DEBUG
 void CompilationInfo::PrintAstForTesting() {
   PrintF("--- Source from AST ---\n%s\n",
          PrettyPrinter(isolate(), zone()).PrintProgram(function()));
 }
 #endif
 }  // namespace internal
 }  // namespace v8