Hi all, I came across a strange behaviour of avr-gcc. In one of our programs (4k in Flash) the assembler code shows that the registers r2, r3, r5 and r6 are not used at all. Since we are (as everyone, I guess) short in code space, I am wondering if there are some tricks that can make avr-gcc use those registers, too.
I'm not saying avr-gcc has a bug, as those registers are used when I compile other code. Ideally, what I would like to know is if there is some special magic to make avr-gcc use all available registers and reduce the code size enough that we can squeeze in all the features asked for by marketing ;) I'm using WinAVR 20071221 but 20090313 shows the same behaviour. avr-size prog.elf text data bss dec hex filename 4092 0 80 4172 104c prog.elf Cheers, Thomas _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
