"Ptimize" is a special, shortened form of "Optimise" - Erik has just optimised-out the initial 'O' !! ;-)

Seriously, if a compiler sees that you write to a variable, and then immediately overwrite it with something else, it will quite correctly deduce that there was no point in writing the first value at all!
Therefore the compiler will not write the first value - we say that it will "optimise-out" the pointless, redundant write:

daddr = 0x32; 
daddr = 0xa1;  // This immediately over-writes the previous value
daddr = 0x32;  // This immediately over-writes the previous value 
daddr = 0xa1;  // This immediately over-writes the previous value

Therefore the above sequence of instructions would be optimised to:

daddr = 0xa1;

In fact, all the assignments in your code are redundant and could be optimised-out, since you are just writing to variables that nothing else ever reads!!

To prevent this sort of optimisation, you need to look up the 'volatile' keyword in your 'C' textbook...