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

src/compiler/machine-type.h

 // Copyright 2014 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.
 
 #ifndef V8_COMPILER_MACHINE_TYPE_H_
 #define V8_COMPILER_MACHINE_TYPE_H_
 
+#include "src/base/bits.h"
 #include "src/globals.h"
 
 namespace v8 {
 namespace internal {
 
 class OStream;
 
 namespace compiler {
 
 // Machine-level types and representations.
@@ skipping 57 matching lines @@
 
 // Gets only the type of the given type.
 inline MachineType TypeOf(MachineType machine_type) {
   int result = machine_type & kTypeMask;
   return static_cast<MachineType>(result);
 }
 
 // Gets only the representation of the given type.
 inline MachineType RepresentationOf(MachineType machine_type) {
   int result = machine_type & kRepMask;
-  CHECK(IsPowerOf2(result));
+  CHECK(base::bits::IsPowerOfTwo32(result));
   return static_cast<MachineType>(result);
 }
 
 // Gets the element size in bytes of the machine type.
 inline int ElementSizeOf(MachineType machine_type) {
   switch (RepresentationOf(machine_type)) {
     case kRepBit:
     case kRepWord8:
       return 1;
     case kRepWord16:
@@ skipping 36 matching lines @@
  protected:
   uint8_t return_count_;
   uint16_t param_count_;
   MachineType* reps_;
 };
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MACHINE_TYPE_H_