Cleanup unused crates

Author: Aaron1011

Cargo.lock

@@ -3505,7 +3505,6 @@ version = "0.0.0"
 dependencies = [
  "log",
  "rustc_ast",
- "rustc_data_structures",
  "rustc_span",
 ]
 
@@ -3522,7 +3521,6 @@ dependencies = [
  "rustc_session",
  "rustc_span",
  "serialize",
- "smallvec 1.0.0",
 ]
 
 [[package]]
@@ -3781,7 +3779,6 @@ dependencies = [
  "rustc_ast",
  "rustc_attr",
  "rustc_data_structures",
- "rustc_error_codes",
  "rustc_errors",
  "rustc_hir",
  "rustc_index",
@@ -3948,7 +3945,6 @@ dependencies = [
  "rustc_hir",
  "rustc_index",
  "rustc_infer",
- "rustc_macros",
  "rustc_session",
  "rustc_span",
  "rustc_target",
@@ -3985,7 +3981,6 @@ dependencies = [
  "rustc_attr",
  "rustc_data_structures",
  "rustc_errors",
- "rustc_feature",
  "rustc_hir",
  "rustc_index",
  "rustc_infer",
@@ -4039,7 +4034,6 @@ dependencies = [
  "rustc_expand",
  "rustc_feature",
  "rustc_hir",
- "rustc_infer",
  "rustc_metadata",
  "rustc_session",
  "rustc_span",
@@ -4075,7 +4069,6 @@ dependencies = [
  "rustc_errors",
  "rustc_feature",
  "rustc_fs_util",
- "rustc_index",
  "rustc_span",
  "rustc_target",
  "serialize",
@@ -4129,9 +4122,7 @@ dependencies = [
  "rustc_data_structures",
  "rustc_hir",
  "rustc_infer",
- "rustc_macros",
  "rustc_span",
- "rustc_target",
  "smallvec 1.0.0",
 ]
 

src/librustc/lib.rs

@@ -91,3 +91,8 @@ pub mod util {
 
 // Allows macros to refer to this crate as `::rustc`
 extern crate self as rustc;
+
+// Suppress warning: these crates will be unused when cfg(parallel_compiler) is not enabled
+use rustc_rayon as _;
+use rustc_rayon_core as _;
+use jobserver as _;

src/librustc_ast_pretty/Cargo.toml

@@ -12,5 +12,4 @@ doctest = false
 [dependencies]
 log = "0.4"
 rustc_span = { path = "../librustc_span" }
-rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_ast = { path = "../librustc_ast" }

src/librustc_attr/Cargo.toml

@@ -17,6 +17,5 @@ rustc_span = { path = "../librustc_span" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_feature = { path = "../librustc_feature" }
 rustc_macros = { path = "../librustc_macros" }
-smallvec = { version = "1.0", features = ["union", "may_dangle"] }
 rustc_session = { path = "../librustc_session" }
 rustc_ast = { path = "../librustc_ast" }

src/librustc_data_structures/lib.rs

@@ -24,6 +24,11 @@
 #![feature(thread_id_value)]
 #![allow(rustc::default_hash_types)]
 
+// Suppress warning: these crates will be unused when cfg(parallel_compiler) is not enabled
+use crossbeam_utils as _;
+use rayon as _;
+use rayon_core as _;
+
 #[macro_use]
 extern crate log;
 #[cfg(unix)]

src/librustc_infer/Cargo.toml

@@ -17,7 +17,6 @@ rustc_attr = { path = "../librustc_attr" }
 rustc = { path = "../librustc" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_errors = { path = "../librustc_errors" }
-rustc_error_codes = { path = "../librustc_error_codes" }
 rustc_hir = { path = "../librustc_hir" }
 rustc_index = { path = "../librustc_index" }
 rustc_macros = { path = "../librustc_macros" }

src/librustc_interface/lib.rs

@@ -21,3 +21,6 @@ pub use queries::Queries;
 
 #[cfg(test)]
 mod tests;
+
+// Suppress warning: this crate will be unused when cfg(parallel_compiler) is not enable
+use rayon as _;

src/librustc_mir_build/Cargo.toml

@@ -20,7 +20,6 @@ rustc_index = { path = "../librustc_index" }
 rustc_errors = { path = "../librustc_errors" }
 rustc_hir = { path = "../librustc_hir" }
 rustc_infer = { path = "../librustc_infer" }
-rustc_macros = { path = "../librustc_macros" }
 rustc_serialize = { path = "../libserialize", package = "serialize" }
 rustc_session = { path = "../librustc_session" }
 rustc_span = { path = "../librustc_span" }

src/librustc_passes/Cargo.toml

@@ -14,7 +14,6 @@ rustc = { path = "../librustc" }
 rustc_attr = { path = "../librustc_attr" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_errors = { path = "../librustc_errors" }
-rustc_feature = { path = "../librustc_feature" }
 rustc_hir = { path = "../librustc_hir" }
 rustc_index = { path = "../librustc_index" }
 rustc_infer = { path = "../librustc_infer" }

src/librustc_resolve/Cargo.toml

@@ -24,7 +24,6 @@ rustc_errors = { path = "../librustc_errors" }
 rustc_expand = { path = "../librustc_expand" }
 rustc_feature = { path = "../librustc_feature" }
 rustc_hir = { path = "../librustc_hir" }
-rustc_infer = { path = "../librustc_infer" }
 rustc_metadata = { path = "../librustc_metadata" }
 rustc_session = { path = "../librustc_session" }
 rustc_span = { path = "../librustc_span" }

src/librustc_session/Cargo.toml

@@ -16,7 +16,6 @@ rustc_target = { path = "../librustc_target" }
 rustc_serialize = { path = "../libserialize", package = "serialize" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_span = { path = "../librustc_span" }
-rustc_index = { path = "../librustc_index" }
 rustc_fs_util = { path = "../librustc_fs_util" }
 num_cpus = "1.0"
 rustc_ast = { path = "../librustc_ast" }

src/librustc_traits/Cargo.toml

@@ -13,8 +13,6 @@ log = { version = "0.4" }
 rustc = { path = "../librustc" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_hir = { path = "../librustc_hir" }
-rustc_macros = { path = "../librustc_macros" }
-rustc_target = { path = "../librustc_target" }
 rustc_ast = { path = "../librustc_ast" }
 rustc_span = { path = "../librustc_span" }
 smallvec = { version = "1.0", features = ["union", "may_dangle"] }

src/libtest/lib.rs

@@ -40,6 +40,9 @@ pub use self::types::*;
 pub use self::ColorConfig::*;
 pub use cli::TestOpts;
 
+// Suppress warning: we need this crate in the sysroot
+use proc_macro as _;
+
 // Module to be used by rustc to compile tests in libtest
 pub mod test {
     pub use crate::{

src/rustc/rustc.rs

@@ -1,3 +1,6 @@
+// Suppress warning: we need this crate in the sysroot
+use rustc_codegen_ssa;
+
 fn main() {
     // Pull in jemalloc when enabled.
     //