ices/83837.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#83837

#![feature(staged_api)]
struct u16x2(u16, u16);
extern "platform-intrinsic" {
    #[rustc_const_stable(feature = "foo", since = "1.3.37")]
    fn simd_insert(x: T, idx: u32, val: U);
}
fn main() {
    const U: u16x2 = u16x2(13, 14);
    const { simd_insert(U, 0x1319_8a2e, 42_u16) }
}

=== stdout ===
=== stderr ===
error[E0412]: cannot find type `T` in this scope
 --> /home/runner/work/glacier/glacier/ices/83837.rs:5:23
  |
5 |     fn simd_insert(x: T, idx: u32, val: U);
  |                       ^ not found in this scope

error[E0412]: cannot find type `U` in this scope
 --> /home/runner/work/glacier/glacier/ices/83837.rs:5:41
  |
5 |     fn simd_insert(x: T, idx: u32, val: U);
  |                                         ^ not found in this scope

error[E0658]: inline-const is experimental
 --> /home/runner/work/glacier/glacier/ices/83837.rs:9:5
  |
9 |     const { simd_insert(U, 0x1319_8a2e, 42_u16) }
  |     ^^^^^
  |
  = note: see issue #76001 <https://github.com/rust-lang/rust/issues/76001> for more information
  = help: add `#![feature(inline_const)]` to the crate attributes to enable

error[E0658]: platform intrinsics are experimental and possibly buggy
 --> /home/runner/work/glacier/glacier/ices/83837.rs:3:8
  |
3 | extern "platform-intrinsic" {
  |        ^^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #27731 <https://github.com/rust-lang/rust/issues/27731> for more information
  = help: add `#![feature(platform_intrinsics)]` to the crate attributes to enable

warning: type `u16x2` should have an upper camel case name
 --> /home/runner/work/glacier/glacier/ices/83837.rs:2:8
  |
2 | struct u16x2(u16, u16);
  |        ^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `U16x2`
  |
  = note: `#[warn(non_camel_case_types)]` on by default

error[E0094]: intrinsic has wrong number of type parameters: found 0, expected 2
 --> /home/runner/work/glacier/glacier/ices/83837.rs:5:19
  |
5 |     fn simd_insert(x: T, idx: u32, val: U);
  |                   ^ expected 2 type parameters

error: aborting due to 5 previous errors; 1 warning emitted

Some errors have detailed explanations: E0094, E0412, E0658.
For more information about an error, try `rustc --explain E0094`.
==============