Auto merge of #74862 - mark-i-m:mv-compiler, r=petrochenkov

Move almost all compiler crates to compiler/

This PR implements https://github.com/rust-lang/compiler-team/issues/336 and moves all `rustc_*` crates from `src` to the new `compiler` directory.

`librustc_foo` directories are renamed to `rustc_foo`.
`src` directories are introduced inside `rustc_*` directories to mirror the scheme already use for `library` crates.

1 files changed, 15 insertions, 0 deletions

diff --git a/compiler/rustc_trait_selection/src/traits/query/mod.rs b/compiler/rustc_trait_selection/src/traits/query/mod.rs
new file mode 100644
index 00000000000..01f4f09e238
--- /dev/null
+++ b/compiler/rustc_trait_selection/src/traits/query/mod.rs
@@ -0,0 +1,15 @@
+//! Experimental types for the trait query interface. The methods
+//! defined in this module are all based on **canonicalization**,
+//! which makes a canonical query by replacing unbound inference
+//! variables and regions, so that results can be reused more broadly.
+//! The providers for the queries defined here can be found in
+//! `librustc_traits`.
+
+pub mod dropck_outlives;
+pub mod evaluate_obligation;
+pub mod method_autoderef;
+pub mod normalize;
+pub mod outlives_bounds;
+pub mod type_op;
+
+pub use rustc_middle::traits::query::*;