Rollup merge of #69920 - Centril:hir-cleanup, r=Zoxc

Remove some imports to the rustc crate

- When we have `NestedVisitorMap::None`, we use `type Map = dyn intravisit::Map<'v>;` instead of the actual map. This doesn't actually result in dynamic dispatch (in the future we may want to use an associated type default to simplify the code).

- Use `rustc_session::` imports instead of `rustc::{session, lint}`.

r? @Zoxc

4 files changed, 6 insertions, 5 deletions

diff --git a/src/librustc_codegen_utils/Cargo.toml b/src/librustc_codegen_utils/Cargo.toml
index b5533a8307c..7ab59029bc8 100644
--- a/src/librustc_codegen_utils/Cargo.toml
+++ b/src/librustc_codegen_utils/Cargo.toml
@@ -21,3 +21,4 @@ rustc_hir = { path = "../librustc_hir" }
 rustc_target = { path = "../librustc_target" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_metadata = { path = "../librustc_metadata" }
+rustc_session = { path = "../librustc_session" }
diff --git a/src/librustc_codegen_utils/codegen_backend.rs b/src/librustc_codegen_utils/codegen_backend.rs
index 96166e04c2e..561692e7066 100644
--- a/src/librustc_codegen_utils/codegen_backend.rs
+++ b/src/librustc_codegen_utils/codegen_backend.rs
@@ -10,11 +10,11 @@ use std::any::Any;
 
 use rustc::dep_graph::DepGraph;
 use rustc::middle::cstore::{EncodedMetadata, MetadataLoaderDyn};
-use rustc::session::config::{OutputFilenames, PrintRequest};
-use rustc::session::Session;
 use rustc::ty::query::Providers;
 use rustc::ty::TyCtxt;
 use rustc::util::common::ErrorReported;
+use rustc_session::config::{OutputFilenames, PrintRequest};
+use rustc_session::Session;
 use rustc_span::symbol::Symbol;
 
 pub use rustc_data_structures::sync::MetadataRef;
diff --git a/src/librustc_codegen_utils/link.rs b/src/librustc_codegen_utils/link.rs
index 2850a29148e..1f53eec514b 100644
--- a/src/librustc_codegen_utils/link.rs
+++ b/src/librustc_codegen_utils/link.rs
@@ -1,6 +1,6 @@
-use rustc::session::config::{self, Input, OutputFilenames, OutputType};
-use rustc::session::Session;
 use rustc_ast::{ast, attr};
+use rustc_session::config::{self, Input, OutputFilenames, OutputType};
+use rustc_session::Session;
 use rustc_span::symbol::sym;
 use rustc_span::Span;
 use std::path::{Path, PathBuf};
diff --git a/src/librustc_codegen_utils/symbol_names.rs b/src/librustc_codegen_utils/symbol_names.rs
index cfde09fad62..eb3fe49a5e9 100644
--- a/src/librustc_codegen_utils/symbol_names.rs
+++ b/src/librustc_codegen_utils/symbol_names.rs
@@ -89,12 +89,12 @@
 
 use rustc::middle::codegen_fn_attrs::CodegenFnAttrFlags;
 use rustc::mir::mono::{InstantiationMode, MonoItem};
-use rustc::session::config::SymbolManglingVersion;
 use rustc::ty::query::Providers;
 use rustc::ty::subst::SubstsRef;
 use rustc::ty::{self, Instance, TyCtxt};
 use rustc_hir::def_id::{CrateNum, LOCAL_CRATE};
 use rustc_hir::Node;
+use rustc_session::config::SymbolManglingVersion;
 
 use rustc_span::symbol::Symbol;