Move to new crate rustc_ty.

Cargo.lock

@@ -3642,6 +3642,7 @@ dependencies = [
  "rustc_span",
  "rustc_target",
  "rustc_traits",
+ "rustc_ty",
  "rustc_typeck",
  "serialize",
  "smallvec 1.0.0",
@@ -3918,6 +3919,17 @@ dependencies = [
  "syntax",
 ]
 
+[[package]]
+name = "rustc_ty"
+version = "0.0.0"
+dependencies = [
+ "log",
+ "rustc",
+ "rustc_data_structures",
+ "rustc_hir",
+ "rustc_span",
+]
+
 [[package]]
 name = "rustc_typeck"
 version = "0.0.0"

src/librustc_interface/Cargo.toml

@@ -39,6 +39,7 @@ rustc_errors = { path = "../librustc_errors" }
 rustc_plugin_impl = { path = "../librustc_plugin_impl" }
 rustc_privacy = { path = "../librustc_privacy" }
 rustc_resolve = { path = "../librustc_resolve" }
+rustc_ty = { path = "../librustc_ty" }
 tempfile = "3.0.5"
 once_cell = "1"
 

src/librustc_passes/lib.rs

@@ -31,7 +31,6 @@ pub mod loops;
 mod reachable;
 mod region;
 pub mod stability;
-mod ty;
 
 pub fn provide(providers: &mut Providers<'_>) {
     check_const::provide(providers);
@@ -44,5 +43,4 @@ pub fn provide(providers: &mut Providers<'_>) {
     reachable::provide(providers);
     region::provide(providers);
     stability::provide(providers);
-    ty::provide(providers);
 }

src/librustc_ty/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+authors = ["The Rust Project Developers"]
+name = "rustc_ty"
+version = "0.0.0"
+edition = "2018"
+
+[lib]
+name = "rustc_ty"
+path = "lib.rs"
+
+[dependencies]
+log = "0.4"
+rustc = { path = "../librustc" }
+rustc_data_structures = { path = "../librustc_data_structures" }
+rustc_hir = { path = "../librustc_hir" }
+rustc_span = { path = "../librustc_span" }

src/librustc_ty/lib.rs

@@ -0,0 +1,25 @@
+//! Various checks
+//!
+//! # Note
+//!
+//! This API is completely unstable and subject to change.
+
+#![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
+#![feature(bool_to_option)]
+#![feature(in_band_lifetimes)]
+#![feature(nll)]
+#![feature(slice_patterns)]
+#![recursion_limit = "256"]
+
+#[macro_use]
+extern crate rustc;
+#[macro_use]
+extern crate log;
+
+use rustc::ty::query::Providers;
+
+mod ty;
+
+pub fn provide(providers: &mut Providers<'_>) {
+    ty::provide(providers);
+}