Florian Weimer wrote: >> On 08/31/2016 10:57 AM, Toshi Morita wrote: >> >> However, if the definition of pfoo is changed to: const int * const pfoo = (const int * const 0x1234); >> the optimization seems to fail: > > The optimization is not valid in this case because the compiler cannot know that the object was declared const. > It could well be mutable. Sorry, that should be: const int * const pfoo = (const int * const)0x1234; So assuming this is still wrong, what is the correct way to define a pointer to a hardware register at 0x1234 which contains immutable data? I'm missing something here. Toshi
