[debug] make sure switching to debug fcg code works.

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 <memory>
 
 #include "src/asmjs/asm-js.h"
@@ skipping 430 matching lines @@
 }
 
 bool ShouldUseIgnition(CompilationInfo* info) {
   if (!FLAG_ignition) return false;
 
   DCHECK(info->has_shared_info());
 
   // When requesting debug code as a replacement for existing code, we provide
   // the same kind as the existing code (to prevent implicit tier-change).
   if (info->is_debug() && info->shared_info()->is_compiled()) {
-    return info->shared_info()->HasBytecodeArray();
+    return !info->shared_info()->HasBaselineCode();
   }
 
   // Since we can't OSR from Ignition, skip Ignition for asm.js functions.
   if (info->shared_info()->asm_function()) {
     return false;
   }
 
   // Checks whether top level functions should be passed by the filter.
   if (info->shared_info()->is_toplevel()) {
     Vector<const char> filter = CStrVector(FLAG_ignition_filter);
@@ skipping 1491 matching lines @@
     DCHECK(shared->is_compiled());
     function->set_literals(cached.literals);
   } else if (shared->is_compiled()) {
     // TODO(mvstanton): pass pretenure flag to EnsureLiterals.
     JSFunction::EnsureLiterals(function);
   }
 }
 
 }  // namespace internal
 }  // namespace v8