[Sdcc-user] problems with long long on the 8051-port?

[Anton P. <an...@om...>]

Hi,

I have the following test code:

void main() {
    UINT32 largeWait = 0xddeeaaff;
    BYTE *p;
    int k = 0;
   
    SETUP_DEBUG();

    k = 0;

    while(1) {
        p = (BYTE *)&largeWait;
        DEBUG_PRINT("%d : %x - %x - %x - %x",
                k,
                p[0],
                p[1],
                p[2],
                p[3]);
   
        k++;

        largeWait++;
    }

The code works as expected, which means that increasing largeWait with 1 
during each itteration increases the values pointed to by p.
However, if the initalization of p is performed during declaration, like 
this:


void main() {
    UINT32 largeWait = 0xddeeaaff;
    BYTE *p = (BYTE *)&largeWait;
    int k = 0;
   
    SETUP_DEBUG();

    k = 0;

    while(1) {      
        DEBUG_PRINT("%d : %x - %x - %x - %x",
                k,
                p[0],
                p[1],
                p[2],
                p[3]);
   
        k++;

        largeWait++;
    }

Then the printed value of p is correct the first time, but it does not 
increase.
I would guess that it is due to a problem with optimization, perhaps it is
a known bug?

   Kind regards, Anton Persson, Omicron Ceti AB