Hi guys, I have a small program with the following statements - DDRB = 0x1; DDRB = DDRB<<2; DDRB += 5; I am compiling it with "avr-gcc -mmcu=atmega8 -O3 -fdump-tree-all ledchase.c". As you can see, I am dumping the content after each pass in avr-gcc. In the dumps, I see that neither statement 2 nor 3 is optimized i.e. I don't see "DDRB = 4 (from 2nd statement)" or "DDRB = 5 (from 3rd statement)". My question is - Is it possible to achieve such optimizations with avr-gcc? if not, why? Please let me know. It would help me a lot. Thanks in advance ! Thanks and regards, Sandeep.
