#90621 causes a compile-time error on every aarch64 function which just has the neon feature explicitly enabled via #[target_feature(enable = "neon"), even if fp is enabled implicitly. This will cause a good amount of breakage across the ecosystem - Github Code Search. After this change even running TARGET=aarch64-apple-darwin cargo test on stdarch fails with lots of compile-time errors.
Apparently the stdarch build problems also cause any usage of aarch64 intrinsics to fail in current nightly. Trying to compile this:
fn main() {
unsafe {
let _ = core::arch::aarch64::vmovq_n_u8(0);
}
}results in:
$ cargo +nightly build
Compiling xx v0.1.0 (/Users/hans/dev/xx)
error: the target features fp, neon must all be either enabled or disabled together
--> /Users/hans/.rustup/toolchains/nightly-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/../../stdarch/crates/core_arch/src/arm_shared/neon/mod.rs:5191:1
|
5191 | #[target_feature(enable = "neon")]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: add the missing features in a `target_feature` attribute
error: the target features fp, neon must all be either enabled or disabled together
--> /Users/hans/.rustup/toolchains/nightly-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/../../stdarch/crates/core_arch/src/arm_shared/neon/mod.rs:5721:1
|
5721 | #[target_feature(enable = "neon")]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: add the missing features in a `target_feature` attribute
error: could not compile `xx` due to 2 previous errors
(I found out because of a sudden CI failure for simdutf8 here.)
Originally posted by @hkratz in #90621 (comment)
@rustbot label O-arm A-simd C-bug
#90621 causes a compile-time error on every aarch64 function which just has the neon feature explicitly enabled via
#[target_feature(enable = "neon"), even iffpis enabled implicitly. This will cause a good amount of breakage across the ecosystem - Github Code Search. After this change even runningTARGET=aarch64-apple-darwin cargo testonstdarchfails with lots of compile-time errors.Apparently the stdarch build problems also cause any usage of aarch64 intrinsics to fail in current nightly. Trying to compile this:
results in:
(I found out because of a sudden CI failure for simdutf8 here.)
Originally posted by @hkratz in #90621 (comment)
@rustbot label O-arm A-simd C-bug