First step to cleanup the power-of-2 mess.

src/ic/stub-cache.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/v8.h"
 
+#include "src/base/bits.h"
 #include "src/ic/stub-cache.h"
 #include "src/type-info.h"
 
 namespace v8 {
 namespace internal {
 
 
 StubCache::StubCache(Isolate* isolate) : isolate_(isolate) {}
 
 
 void StubCache::Initialize() {
-  DCHECK(IsPowerOf2(kPrimaryTableSize));
-  DCHECK(IsPowerOf2(kSecondaryTableSize));
+  DCHECK(base::bits::IsPowerOfTwo32(kPrimaryTableSize));
+  DCHECK(base::bits::IsPowerOfTwo32(kSecondaryTableSize));
   Clear();
 }
 
 
 static Code::Flags CommonStubCacheChecks(Name* name, Map* map,
                                          Code::Flags flags) {
   flags = Code::RemoveTypeAndHolderFromFlags(flags);
 
   // Validate that the name does not move on scavenge, and that we
   // can use identity checks instead of structural equality checks.
@@ skipping 107 matching lines @@
       int offset = SecondaryOffset(*name, flags, primary_offset);
       if (entry(secondary_, offset) == &secondary_[i] &&
           !TypeFeedbackOracle::CanRetainOtherContext(map, *native_context)) {
         types->AddMapIfMissing(Handle<Map>(map), zone);
       }
     }
   }
 }
 }
 }  // namespace v8::internal