fd1f1fa0d1
Stabilize cmpxchg16b_target_feature Tracking issue for target features + #44839 stdarch issue + https://github.com/rust-lang/stdarch/issues/827 stdarch PR + https://github.com/rust-lang/stdarch/pull/1358 reference PR + https://github.com/rust-lang/reference/pull/1331 It's my first time contributing to rust-lang/rust. Please tell me if I missed something.
Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.