PRE in GCC-3.3.3

[Rajesh Babu]

Hi,
	I found that PRE is not done in gcc-3.3.3, though the code for 
doing PRE exists in source code.

	In the following example, expression a+b is partially redundant 
and must be eliminated, but it is not done when gcc-3.3.3 is used, where 
as it is done when gcc-3.4.1 is used.

        Can someone confirm me that this is the problem with gcc-3.3.3.
foo ()
{
        int a,b,c,d;
        scanf ("%d%d",&a,&b);
        if (a)
        {
                c = a + b;
        }
        else
        {
                d = c++;
        }
        d = c;
        c = a + b;
        printf ("%d%d",c,d);
}
Rajesh Babu