Test NEON compiles

Required by rust-lang#95002

src/test/ui/target-feature/aarch64-neon-works.rs

@@ -0,0 +1,24 @@
+// only-aarch64
+// run-pass
+use std::arch::aarch64::*;
+
+// Smoke test to verify aarch64 code that enables NEON compiles.
+fn main() {
+ let zero = if is_aarch64_feature_detected!("neon") {
+ unsafe {
+ let zeros = zero_vector();
+ vget_lane_u8::<1>(1)
+ }
+ } else {
+ 0
+ };
+ if cfg!(target feature = "neon") {
+ assert_eq!(zero, 0)
+ };
+}
+
+
+#[target_feature(enable = "neon")]
+unsafe fn zero_vector() -> uint8x16_t {
+ vmovq_n_u8(0)
+}