Rollup merge of rust-lang#145322 - LorrensP-2158466:early-prelude-processing, r=petrochenkov

Resolve the prelude import in `build_reduced_graph`

This pr tries to resolve the prelude import at the `build_reduced_graph` stage.
Part of batched import resolution in rust-lang#145108 (cherry picked commit) and maybe needed for rust-lang#139493.

r? petrochenkov

Author: Zalathar

core/src/lib.rs

@@ -208,6 +208,10 @@
 #[allow(unused_extern_crates)]
 extern crate self as core;
 
+/* The core prelude, not as all-encompassing as the std prelude */
+// The compiler expects the prelude definition to be defined before it's use statement.
+pub mod prelude;
+
 #[prelude_import]
 #[allow(unused)]
 use prelude::rust_2024::*;
@@ -293,10 +297,6 @@ pub mod f64;
 #[macro_use]
 pub mod num;
 
-/* The core prelude, not as all-encompassing as the std prelude */
-
-pub mod prelude;
-
 /* Core modules for ownership management */
 
 pub mod hint;

std/src/lib.rs

@@ -428,6 +428,10 @@
 //
 #![default_lib_allocator]
 
+// The Rust prelude
+// The compiler expects the prelude definition to be defined before it's use statement.
+pub mod prelude;
+
 // Explicitly import the prelude. The compiler uses this same unstable attribute
 // to import the prelude implicitly when building crates that depend on std.
 #[prelude_import]
@@ -483,9 +487,6 @@ mod macros;
 #[macro_use]
 pub mod rt;
 
-// The Rust prelude
-pub mod prelude;
-
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use core::any;
 #[stable(feature = "core_array", since = "1.35.0")]