Re:Show HN: I wrote a WebAssembly Interpreter and Toolkit in C
by lifthrasiir on Tuesday January 10, 2023 @12:21AM
(#34320853)
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....