[heap] remove alignment requirement from AllocationInfo::limit

src/heap/spaces.h

 // Copyright 2011 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_HEAP_SPACES_H_
 #define V8_HEAP_SPACES_H_
 
 #include "src/allocation.h"
 #include "src/atomic-utils.h"
 #include "src/base/atomicops.h"
@@ skipping 1471 matching lines @@
 
   INLINE(Address top()) const {
     SLOW_DCHECK(top_ == NULL ||
                 (reinterpret_cast<intptr_t>(top_) & kHeapObjectTagMask) == 0);
     return top_;
   }
 
   Address* top_address() { return &top_; }
 
   INLINE(void set_limit(Address limit)) {
-    SLOW_DCHECK(limit == NULL ||
-                (reinterpret_cast<intptr_t>(limit) & kHeapObjectTagMask) == 0);
     limit_ = limit;
   }
 
   INLINE(Address limit()) const {
     SLOW_DCHECK(limit_ == NULL ||
                 (reinterpret_cast<intptr_t>(limit_) & kHeapObjectTagMask) ==
                     0);
     return limit_;
   }
 
@@ skipping 1622 matching lines @@
     count = 0;
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_SPACES_H_