"Bingfeng Mei" writes:
> Then how do I tell compiler that "a" is not aliased if I have to use global
> variable?
>
>>
>> > Thanks,
>> > Bingfeng Mei
>> >
>> > int a;
>> > int P[100];
>> > void foo (int * restrict p)
>> > {
>> > P[0] = *p;
>> > a++;
>> > P[1] = *p;
>> > a++;
>> > P[2] = *p
> -Original Message-
> From: Richard Guenther [mailto:richard.guent...@gmail.com]
> Sent: 06 September 2011 16:42
> To: Bingfeng Mei
> Cc: gcc@gcc.gnu.org
> Subject: Re: Is this correct behaviour?
>
> On Tue, Sep 6, 2011 at 5:30 PM, Bingfeng Mei wrote:
&
On Tue, Sep 6, 2011 at 5:30 PM, Bingfeng Mei wrote:
> Hi,
> I compile the following code with arm gcc 4.6 (x86 is the similar with one of
> 4.7 snapshot).
> I noticed "a" is written to memory three times instead of being added by 3
> and written at the
> end. Doesn't restrict guarantee "a" won't
