rust/tests/ui/abi/removed-wasm-abi.rs

extern "wasm" fn test() {}
//~^ ERROR invalid ABI: found `wasm`

fn main() {}
Remove extern "wasm" ABI Remove the unstable `extern "wasm"` ABI (`wasm_abi` feature tracked in #83788). As discussed in https://github.com/rust-lang/rust/pull/127513#issuecomment-2220410679 and following, this ABI is a failed experiment that did not end up being used for anything. Keeping support for this ABI in LLVM 19 would require us to switch wasm targets to the `experimental-mv` ABI, which we do not want to do. It should be noted that `Abi::Wasm` was internally used for two things: The `-Z wasm-c-abi=legacy` ABI that is still used by default on some wasm targets, and the `extern "wasm"` ABI. Despite both being `Abi::Wasm` internally, they were not the same. An explicit `extern "wasm"` additionally enabled the `+multivalue` feature. I've opted to remove `Abi::Wasm` in this patch entirely, instead of keeping it as an ABI with only internal usage. Both `-Z wasm-c-abi` variants are now treated as part of the normal C ABI, just with different different treatment in adjust_for_foreign_abi. 2024-07-10 15:20:21 +00:00			`extern "wasm" fn test() {}`
			//~^ ERROR invalid ABI: found `wasm`

			`fn main() {}`