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| author | Nikita Popov <npopov@redhat.com> | 2024-07-10 17:20:21 +0200 |
|---|---|---|
| committer | Nikita Popov <npopov@redhat.com> | 2024-07-11 12:20:26 +0200 |
| commit | 8a50bcbdceacca60126c085c7cad46aced589c87 (patch) | |
| tree | ad54c95ac9ab358576c4076337b9594fb8600649 /compiler/rustc_feature/src | |
| parent | 0fdfb61795b40037955154638fe35f20b16c8e55 (diff) | |
| download | rust-8a50bcbdceacca60126c085c7cad46aced589c87.tar.gz rust-8a50bcbdceacca60126c085c7cad46aced589c87.zip | |
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.
Diffstat (limited to 'compiler/rustc_feature/src')
| -rw-r--r-- | compiler/rustc_feature/src/removed.rs | 3 | ||||
| -rw-r--r-- | compiler/rustc_feature/src/unstable.rs | 2 |
2 files changed, 3 insertions, 2 deletions
diff --git a/compiler/rustc_feature/src/removed.rs b/compiler/rustc_feature/src/removed.rs index aea447b2aff..f13aa506c1e 100644 --- a/compiler/rustc_feature/src/removed.rs +++ b/compiler/rustc_feature/src/removed.rs @@ -215,6 +215,9 @@ declare_features! ( /// Permits specifying whether a function should permit unwinding or abort on unwind. (removed, unwind_attributes, "1.56.0", Some(58760), Some("use the C-unwind ABI instead")), (removed, visible_private_types, "1.0.0", None, None), + /// Allows `extern "wasm" fn` + (removed, wasm_abi, "CURRENT_RUSTC_VERSION", Some(83788), + Some("non-standard wasm ABI is no longer supported")), // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! // Features are listed in alphabetical order. Tidy will fail if you don't keep it this way. // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! diff --git a/compiler/rustc_feature/src/unstable.rs b/compiler/rustc_feature/src/unstable.rs index c05cac155b7..d7d994d95c5 100644 --- a/compiler/rustc_feature/src/unstable.rs +++ b/compiler/rustc_feature/src/unstable.rs @@ -640,8 +640,6 @@ declare_features! ( (unstable, unsized_tuple_coercion, "1.20.0", Some(42877)), /// Allows using the `#[used(linker)]` (or `#[used(compiler)]`) attribute. (unstable, used_with_arg, "1.60.0", Some(93798)), - /// Allows `extern "wasm" fn` - (unstable, wasm_abi, "1.53.0", Some(83788)), /// Allows `do yeet` expressions (unstable, yeet_expr, "1.62.0", Some(96373)), // !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! |