restrict on casted pointers

Paulo Matos pmatos@broadcom.com
Wed Aug 28 14:13:00 GMT 2013


> -----Original Message-----
> From: gcc-help-owner@gcc.gnu.org [mailto:gcc-help-owner@gcc.gnu.org] On
> Behalf Of Marc Glisse
> Sent: 28 August 2013 13:19
> To: Paulo Matos
> Cc: gcc-help@gcc.gnu.org
> Subject: Re: restrict on casted pointers
>  
> You are using int16_t***restrict, and the restrict only goes one layer of
> pointer deep, maybe? (I didn't look very closely)
> 

Marc,

Besides the fact that arrays are laid out contiguously in memory so it shouldn't matter, I am marking the pointers through which I access the memory as restrict so GCC shouldn't really care about what I am accessing in memory, only that the pointers involved are marked as restrict. Or at least this is my understanding, GCC seems to think otherwise but it seems like a recent change. gcc-4.5.4 is happy with the restrict keyword in this case and doesn't seem to reload the memory in question.

-- 
Paulo Matos


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