Re: A simple query about memory mgmt

["Manish Katiyar" <mkatiyar@xxxxxxxxx>]

On Wed, Aug 13, 2008 at 10:07 AM, Rene Herman <rene.herman@xxxxxxxxxxxx> wrote:
> On 13-08-08 02:57, Peter Teoh wrote:
>
>> But since u have assigned it to the same address of NAME, it will always
>> print HELLO world.   So the whole thing has nothing got to do with
>> optimization (gcc -O0 to disable it, which is also default).
>
> Can y'all please just listen to Johannes? It definitely does. We have:
>
>> int main()
>> {
>>    char *p_name = "santosh";
>>    char *q_name = "santosh";
>
> It is unspecified whether or not the compiler will allocate one or two
> copies of the character sequence "santosh" and therefore whether or not
> p_name != q_name;

Refer to below link ...... first bullet clearly says that gcc will
store only one copy if strings are identical.

http://gcc.gnu.org/onlinedocs/gcc-3.4.6/gcc/Incompatibilities.html


>
> Just replace it by
>
>> int main()
>> {
>>    char *p_name = "santosh";
>>    char *q_name = "peter";
>
> to understand that allocating it just once is an optimization.
>
> Rene.
>
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