Rollup merge of rust-lang#124003 - WaffleLapkin:dellvmization, r=scottmcm,RalfJung,antoyo

Dellvmize some intrinsics (use `u32` instead of `Self` in some integer intrinsics)

This implements rust-lang/compiler-team#693 minus what was implemented in rust-lang#123226.

Note: I decided to _not_ change `shl`/... builder methods, as it just doesn't seem worth it.

r? ``@scottmcm``

Author: matthiaskrgr

example/example.rs

@@ -153,9 +153,10 @@ fn array_as_slice(arr: &[u8; 3]) -> &[u8] {
     arr
 }
 
-unsafe fn use_ctlz_nonzero(a: u16) -> u16 {
-    intrinsics::ctlz_nonzero(a)
-}
+// FIXME: fix the intrinsic implementation to work with the new ->u32 signature
+// unsafe fn use_ctlz_nonzero(a: u16) -> u32 {
+//     intrinsics::ctlz_nonzero(a)
+// }
 
 fn ptr_as_usize(ptr: *const u8) -> usize {
     ptr as usize

example/mini_core.rs

@@ -593,7 +593,7 @@ pub mod intrinsics {
         pub fn min_align_of_val<T: ?Sized>(val: *const T) -> usize;
         pub fn copy<T>(src: *const T, dst: *mut T, count: usize);
         pub fn transmute<T, U>(e: T) -> U;
-        pub fn ctlz_nonzero<T>(x: T) -> T;
+        pub fn ctlz_nonzero<T>(x: T) -> u32;
         #[rustc_safe_intrinsic]
         pub fn needs_drop<T: ?Sized>() -> bool;
         #[rustc_safe_intrinsic]