Optimize "smi or old" filter in scavenger.

runtime/vm/scavenger.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/scavenger.h"
 
 #include <algorithm>
 #include <map>
 #include <utility>
 
@@ skipping 129 matching lines @@
 
   void ScavengePointer(RawObject** p) {
     // ScavengePointer cannot be called recursively.
 #ifdef DEBUG
     ASSERT(!in_scavenge_pointer_);
     BoolScope bs(&in_scavenge_pointer_, true);
 #endif
 
     RawObject* raw_obj = *p;
 
-    // Fast exit if the raw object is a Smi or an old object.
-    if (!raw_obj->IsHeapObject() || raw_obj->IsOldObject()) {
+    if (raw_obj->IsSmiOrOldObject()) {
       return;
     }
 
     uword raw_addr = RawObject::ToAddr(raw_obj);
     // Objects should be contained in the heap.
     // TODO(iposva): Add an appropriate assert here or in the return block
     // below.
     // The scavenger is only interested in objects located in the from space.
     if (!scavenger_->from_->Contains(raw_addr)) {
       return;
@@ skipping 699 matching lines @@
 }
 
 
 void Scavenger::FreeExternal(intptr_t size) {
   ASSERT(size >= 0);
   external_size_ -= size;
   ASSERT(external_size_ >= 0);
 }
 
 }  // namespace dart