Tied target feature validation occurs too late

[calebzulawski]

I tried this code: https://rust.godbolt.org/z/b6bjzeKz3

#[target_feature(enable = "paca")]
unsafe fn foo() {}

I expected to see this happen: this should fail to compile and require the pacg feature

Instead, this happened: it compiled. If the function is ever used, or if you make it pub, it fails to compile. See also rust-lang/stdarch#1352 (comment)

Meta

rustc --version --verbose:

rustc 1.65.0 (897e37553 2022-11-02)
binary: rustc
commit-hash: 897e37553bba8b42751c67658967889d11ecd120
commit-date: 2022-11-02
host: x86_64-apple-darwin
release: 1.65.0
LLVM version: 15.0.0