It's `register int v asm("eax")`. However they are very easily elided, especially after higher optimization levels; compilers are very open about this [1]. [1]

It's `register int v asm("eax")`. However they are very easily elided, especially after higher optimization levels; compilers are very open about this [1]. [1] https://gcc.gnu.org/onlinedocs/gcc/Local-Register-Variables.html#Local-Register-Variables https://gcc.gnu.org/onlinedocs/gcc/Local-Register-Variables....