Handling pre-increment and post-increment in GCC

[Manjunath B S]

Hello All,
    I am trying to understand how GCC handles this piece of code, but
unfortunately the behaviour is different on different architectures
=====================================================
#include < stdio.h>

int main(void)
{
    int i = 2;

    return printf("Post increment : %d, Pre increment : %d\n", i++, ++i);
}
=====================================================

On Powerpc (Powerbook G4) this gives
%%%%%%%%%%%%%%%%%%%
Post increment : 2, Pre increment : 4

however on Intel machines this gives
%%%%%%%%%%%%%%%%%%%
Post increment : 4, Pre increment : 2

On MIPS & ARM, the behaviour is different as well.

Can anyone please explain the same?? Also can anyone please point me
the direction where I should look in the GCC Internals for a clear
understanding??

Regards,
/Manjunath B.S.



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