tests/mir-opt/issue_91633.rs

// skip-filecheck
//@ compile-flags: -Z mir-opt-level=0
// EMIT_MIR issue_91633.hey.built.after.mir
fn hey<T>(it: &[T])
where
    [T]: std::ops::Index<usize>,
{
    let _ = &it[0];
}

// EMIT_MIR issue_91633.bar.built.after.mir
fn bar<T>(it: Box<[T]>)
where
    [T]: std::ops::Index<usize>,
{
    let _ = it[0];
}

// EMIT_MIR issue_91633.fun.built.after.mir
fn fun<T>(it: &[T]) -> &T {
    let f = &it[0];
    f
}

// EMIT_MIR issue_91633.foo.built.after.mir
fn foo<T: Clone>(it: Box<[T]>) -> T {
    let f = it[0].clone();
    f
}
fn main() {}