Remove some asserts to speed up debug mode.

src/utils.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 150 matching lines @@
 
 static inline uint32_t RoundDownToPowerOf2(uint32_t x) {
   uint32_t rounded_up = RoundUpToPowerOf2(x);
   if (rounded_up > x) return rounded_up >> 1;
   return rounded_up;
 }
 
 
 template <typename T, typename U>
 static inline bool IsAligned(T value, U alignment) {
-  ASSERT(IsPowerOf2(alignment));
   return (value & (alignment - 1)) == 0;
 }
 
 
 // Returns true if (addr + offset) is aligned.
 static inline bool IsAddressAligned(Address addr,
                                     intptr_t alignment,
                                     int offset = 0) {
   intptr_t offs = OffsetFrom(addr + offset);
   return IsAligned(offs, alignment);
@@ skipping 735 matching lines @@
     ASSERT(element < static_cast<int>(sizeof(T) * CHAR_BIT));
     return 1 << element;
   }
 
   T bits_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_UTILS_H_