[Bug target/92821] Miscompilation when passing 8-bit enum to extern function

[emilio at crisal dot io]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92821

--- Comment #3 from Emilio Cobos Álvarez (:emilio) <emilio at crisal dot io> ---
If my reading of https://godbolt.org/z/BNHxEY is correct (sorry, still a bit of
a noob with disassembly), it looks like GCC does correctly load only the low
byte in the equivalent implementation of the Rust function, but clang does
assume zero-extension to 32 bit... :/