Merge r3560, r3562 and r3568 from bleeding_edge to 1.3 branch to fix...

src/utils.cc

 // Copyright 2006-2008 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 22 matching lines @@
 
 #include "sys/stat.h"
 
 namespace v8 {
 namespace internal {
 
 
 // Implementation is from "Hacker's Delight" by Henry S. Warren, Jr.,
 // figure 3-3, page 48, where the function is called clp2.
 uint32_t RoundUpToPowerOf2(uint32_t x) {
+  ASSERT(x <= 0x80000000u);
   x = x - 1;
   x = x | (x >> 1);
   x = x | (x >> 2);
   x = x | (x >> 4);
   x = x | (x >> 8);
   x = x | (x >> 16);
   return x + 1;
 }
 
 
@@ skipping 250 matching lines @@
   buffer_[position_] = '\0';
   // Make sure nobody managed to add a 0-character to the
   // buffer while building the string.
   ASSERT(strlen(buffer_.start()) == static_cast<size_t>(position_));
   position_ = -1;
   ASSERT(is_finalized());
   return buffer_.start();
 }
 
 } }  // namespace v8::internal