Merge ref 'e8f3cfc0de70' from rust-lang/rust

Pull recent changes from https://github.com/rust-lang/rust via Josh.

Upstream ref: e8f3cfc0de70bf82583591f6656e1fba3140253e
Filtered ref: 5837f859c413e836e4fd1eb4985632c2f62c7db0
Upstream diff: rust-lang/rust@7fefa09...e8f3cfc

This merge was created using https://github.com/rust-lang/josh-sync.

Author: The Miri Cronjob Bot

src/offload/usage.md

@@ -57,7 +57,7 @@ fn main() {
 
 #[inline(never)]
 unsafe fn kernel(x: *mut [f64; 256]) {
-    core::intrinsics::offload(kernel_1, (x,))
+    core::intrinsics::offload(_kernel_1, [256, 1, 1], [32, 1, 1], (x,))
 }
 
 #[cfg(target_os = "linux")]

src/tests/directives.md

@@ -213,6 +213,8 @@ settings:
   that this directive can be overriden with the `--bypass-ignore-backends=[BACKEND]` command line
   flag. 
 - `needs-backends` — only runs the test if current codegen backend is listed.
+- `needs-offload` — ignores if our LLVM backend was not built with offload support.
+- `needs-enzyme` — ignores if our Enzyme submodule was not built.
 
 The following directives will check LLVM support: