Auto merge of #52927 - Mark-Simulacrum:cratestore-cleanup, r=alexcrichton

Crate store cleanup

Each commit mostly stands on its own.

Most of the diff is lifetime-related and uninteresting.

src/Cargo.lock

@@ -2219,6 +2219,7 @@ dependencies = [
  "rustc 0.0.0",
  "rustc_data_structures 0.0.0",
  "rustc_incremental 0.0.0",
+ "rustc_metadata_utils 0.0.0",
  "rustc_mir 0.0.0",
  "rustc_target 0.0.0",
  "syntax 0.0.0",
@@ -2352,6 +2353,7 @@ dependencies = [
  "rustc 0.0.0",
  "rustc_data_structures 0.0.0",
  "rustc_errors 0.0.0",
+ "rustc_metadata_utils 0.0.0",
  "rustc_target 0.0.0",
  "serialize 0.0.0",
  "syntax 0.0.0",
@@ -2359,6 +2361,15 @@ dependencies = [
  "syntax_pos 0.0.0",
 ]
 
+[[package]]
+name = "rustc_metadata_utils"
+version = "0.0.0"
+dependencies = [
+ "rustc 0.0.0",
+ "syntax 0.0.0",
+ "syntax_pos 0.0.0",
+]
+
 [[package]]
 name = "rustc_mir"
 version = "0.0.0"
@@ -2441,6 +2452,7 @@ dependencies = [
  "rustc 0.0.0",
  "rustc_data_structures 0.0.0",
  "rustc_errors 0.0.0",
+ "rustc_metadata 0.0.0",
  "syntax 0.0.0",
  "syntax_pos 0.0.0",
 ]

src/librustc/middle/cstore.rs

@@ -22,10 +22,9 @@
 //! are *mostly* used as a part of that interface, but these should
 //! probably get a better home if someone can find one.
 
-use hir::def;
 use hir::def_id::{CrateNum, DefId, LOCAL_CRATE};
 use hir::map as hir_map;
-use hir::map::definitions::{Definitions, DefKey, DefPathTable};
+use hir::map::definitions::{DefKey, DefPathTable};
 use hir::svh::Svh;
 use ty::{self, TyCtxt};
 use session::{Session, CrateDisambiguator};
@@ -34,8 +33,6 @@ use session::search_paths::PathKind;
 use std::any::Any;
 use std::path::{Path, PathBuf};
 use syntax::ast;
-use syntax::edition::Edition;
-use syntax::ext::base::SyntaxExtension;
 use syntax::symbol::Symbol;
 use syntax_pos::Span;
 use rustc_target::spec::Target;
@@ -140,11 +137,6 @@ pub struct ForeignModule {
     pub def_id: DefId,
 }
 
-pub enum LoadedMacro {
-    MacroDef(ast::Item),
-    ProcMacro(Lrc<SyntaxExtension>),
-}
-
 #[derive(Copy, Clone, Debug)]
 pub struct ExternCrate {
     pub src: ExternCrateSource,
@@ -221,9 +213,6 @@ pub trait MetadataLoader {
 pub trait CrateStore {
     fn crate_data_as_rc_any(&self, krate: CrateNum) -> Lrc<dyn Any>;
 
-    // access to the metadata loader
-    fn metadata_loader(&self) -> &dyn MetadataLoader;
-
     // resolve
     fn def_key(&self, def: DefId) -> DefKey;
     fn def_path(&self, def: DefId) -> hir_map::DefPath;
@@ -231,19 +220,11 @@ pub trait CrateStore {
     fn def_path_table(&self, cnum: CrateNum) -> Lrc<DefPathTable>;
 
     // "queries" used in resolve that aren't tracked for incremental compilation
-    fn visibility_untracked(&self, def: DefId) -> ty::Visibility;
-    fn export_macros_untracked(&self, cnum: CrateNum);
-    fn dep_kind_untracked(&self, cnum: CrateNum) -> DepKind;
     fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol;
     fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator;
     fn crate_hash_untracked(&self, cnum: CrateNum) -> Svh;
-    fn crate_edition_untracked(&self, cnum: CrateNum) -> Edition;
-    fn struct_field_names_untracked(&self, def: DefId) -> Vec<ast::Name>;
-    fn item_children_untracked(&self, did: DefId, sess: &Session) -> Vec<def::Export>;
-    fn load_macro_untracked(&self, did: DefId, sess: &Session) -> LoadedMacro;
     fn extern_mod_stmt_cnum_untracked(&self, emod_id: ast::NodeId) -> Option<CrateNum>;
     fn item_generics_cloned_untracked(&self, def: DefId, sess: &Session) -> ty::Generics;
-    fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssociatedItem;
     fn postorder_cnums_untracked(&self) -> Vec<CrateNum>;
 
     // This is basically a 1-based range of ints, which is a little
@@ -260,116 +241,6 @@ pub trait CrateStore {
 
 pub type CrateStoreDyn = dyn CrateStore + sync::Sync;
 
-// FIXME: find a better place for this?
-pub fn validate_crate_name(sess: Option<&Session>, s: &str, sp: Option<Span>) {
-    let mut err_count = 0;
-    {
-        let mut say = |s: &str| {
-            match (sp, sess) {
-                (_, None) => bug!("{}", s),
-                (Some(sp), Some(sess)) => sess.span_err(sp, s),
-                (None, Some(sess)) => sess.err(s),
-            }
-            err_count += 1;
-        };
-        if s.is_empty() {
-            say("crate name must not be empty");
-        }
-        for c in s.chars() {
-            if c.is_alphanumeric() { continue }
-            if c == '_'  { continue }
-            say(&format!("invalid character `{}` in crate name: `{}`", c, s));
-        }
-    }
-
-    if err_count > 0 {
-        sess.unwrap().abort_if_errors();
-    }
-}
-
-/// A dummy crate store that does not support any non-local crates,
-/// for test purposes.
-pub struct DummyCrateStore;
-
-#[allow(unused_variables)]
-impl CrateStore for DummyCrateStore {
-    fn crate_data_as_rc_any(&self, krate: CrateNum) -> Lrc<dyn Any>
-        { bug!("crate_data_as_rc_any") }
-    // item info
-    fn visibility_untracked(&self, def: DefId) -> ty::Visibility { bug!("visibility") }
-    fn item_generics_cloned_untracked(&self, def: DefId, sess: &Session) -> ty::Generics
-        { bug!("item_generics_cloned") }
-
-    // trait/impl-item info
-    fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssociatedItem
-        { bug!("associated_item_cloned") }
-
-    // crate metadata
-    fn dep_kind_untracked(&self, cnum: CrateNum) -> DepKind { bug!("is_explicitly_linked") }
-    fn export_macros_untracked(&self, cnum: CrateNum) { bug!("export_macros") }
-    fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol { bug!("crate_name") }
-    fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator {
-        bug!("crate_disambiguator")
-    }
-    fn crate_hash_untracked(&self, cnum: CrateNum) -> Svh { bug!("crate_hash") }
-    fn crate_edition_untracked(&self, cnum: CrateNum) -> Edition { bug!("crate_edition_untracked") }
-
-    // resolve
-    fn def_key(&self, def: DefId) -> DefKey { bug!("def_key") }
-    fn def_path(&self, def: DefId) -> hir_map::DefPath {
-        bug!("relative_def_path")
-    }
-    fn def_path_hash(&self, def: DefId) -> hir_map::DefPathHash {
-        bug!("def_path_hash")
-    }
-    fn def_path_table(&self, cnum: CrateNum) -> Lrc<DefPathTable> {
-        bug!("def_path_table")
-    }
-    fn struct_field_names_untracked(&self, def: DefId) -> Vec<ast::Name> {
-        bug!("struct_field_names")
-    }
-    fn item_children_untracked(&self, did: DefId, sess: &Session) -> Vec<def::Export> {
-        bug!("item_children")
-    }
-    fn load_macro_untracked(&self, did: DefId, sess: &Session) -> LoadedMacro { bug!("load_macro") }
-
-    fn crates_untracked(&self) -> Vec<CrateNum> { vec![] }
-
-    // utility functions
-    fn extern_mod_stmt_cnum_untracked(&self, emod_id: ast::NodeId) -> Option<CrateNum> { None }
-    fn encode_metadata<'a, 'tcx>(&self,
-                                 tcx: TyCtxt<'a, 'tcx, 'tcx>,
-                                 link_meta: &LinkMeta)
-                                 -> EncodedMetadata {
-        bug!("encode_metadata")
-    }
-    fn metadata_encoding_version(&self) -> &[u8] { bug!("metadata_encoding_version") }
-    fn postorder_cnums_untracked(&self) -> Vec<CrateNum> { bug!("postorder_cnums_untracked") }
-
-    // access to the metadata loader
-    fn metadata_loader(&self) -> &dyn MetadataLoader { bug!("metadata_loader") }
-}
-
-pub trait CrateLoader {
-    fn process_extern_crate(&mut self, item: &ast::Item, defs: &Definitions) -> CrateNum;
-
-    fn process_path_extern(
-        &mut self,
-        name: Symbol,
-        span: Span,
-    ) -> CrateNum;
-
-    fn process_use_extern(
-        &mut self,
-        name: Symbol,
-        span: Span,
-        id: ast::NodeId,
-        defs: &Definitions,
-    ) -> CrateNum;
-
-    fn postprocess(&mut self, krate: &ast::Crate);
-}
-
 // This method is used when generating the command line to pass through to
 // system linker. The linker expects undefined symbols on the left of the
 // command line to be defined in libraries on the right, not the other way

src/librustc_codegen_utils/Cargo.toml

@@ -20,3 +20,4 @@ rustc_target = { path = "../librustc_target" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_mir = { path = "../librustc_mir" }
 rustc_incremental = { path = "../librustc_incremental" }
+rustc_metadata_utils = { path = "../librustc_metadata_utils" }

src/librustc_codegen_utils/lib.rs

@@ -37,6 +37,7 @@ extern crate rustc_incremental;
 extern crate syntax;
 extern crate syntax_pos;
 #[macro_use] extern crate rustc_data_structures;
+extern crate rustc_metadata_utils;
 
 use rustc::ty::TyCtxt;
 

src/librustc_codegen_utils/link.rs

@@ -10,11 +10,12 @@
 
 use rustc::session::config::{self, OutputFilenames, Input, OutputType};
 use rustc::session::Session;
-use rustc::middle::cstore::{self, LinkMeta};
+use rustc::middle::cstore::LinkMeta;
 use rustc::hir::svh::Svh;
 use std::path::{Path, PathBuf};
 use syntax::{ast, attr};
 use syntax_pos::Span;
+use rustc_metadata_utils::validate_crate_name;
 
 pub fn out_filename(sess: &Session,
                 crate_type: config::CrateType,
@@ -61,7 +62,7 @@ pub fn find_crate_name(sess: Option<&Session>,
                        attrs: &[ast::Attribute],
                        input: &Input) -> String {
     let validate = |s: String, span: Option<Span>| {
-        cstore::validate_crate_name(sess, &s, span);
+        validate_crate_name(sess, &s, span);
         s
     };
 

src/librustc_driver/driver.rs

@@ -20,7 +20,6 @@ use rustc::session::config::{self, Input, OutputFilenames, OutputType};
 use rustc::session::search_paths::PathKind;
 use rustc::lint;
 use rustc::middle::{self, reachable, resolve_lifetime, stability};
-use rustc::middle::cstore::CrateStoreDyn;
 use rustc::middle::privacy::AccessLevels;
 use rustc::ty::{self, AllArenas, Resolutions, TyCtxt};
 use rustc::traits;
@@ -484,7 +483,7 @@ impl<'a> ::CompilerCalls<'a> for CompileController<'a> {
         codegen_backend: &dyn (::CodegenBackend),
         matches: &::getopts::Matches,
         sess: &Session,
-        cstore: &dyn (::CrateStore),
+        cstore: &CStore,
         input: &Input,
         odir: &Option<PathBuf>,
         ofile: &Option<PathBuf>,
@@ -728,9 +727,9 @@ pub struct ExpansionResult {
     pub hir_forest: hir_map::Forest,
 }
 
-pub struct InnerExpansionResult<'a> {
+pub struct InnerExpansionResult<'a, 'b: 'a> {
     pub expanded_crate: ast::Crate,
-    pub resolver: Resolver<'a>,
+    pub resolver: Resolver<'a, 'b>,
     pub hir_forest: hir_map::Forest,
 }
 
@@ -806,7 +805,7 @@ where
 
 /// Same as phase_2_configure_and_expand, but doesn't let you keep the resolver
 /// around
-pub fn phase_2_configure_and_expand_inner<'a, F>(
+pub fn phase_2_configure_and_expand_inner<'a, 'b: 'a, F>(
     sess: &'a Session,
     cstore: &'a CStore,
     mut krate: ast::Crate,
@@ -815,9 +814,9 @@ pub fn phase_2_configure_and_expand_inner<'a, F>(
     addl_plugins: Option<Vec<String>>,
     make_glob_map: MakeGlobMap,
     resolver_arenas: &'a ResolverArenas<'a>,
-    crate_loader: &'a mut CrateLoader,
+    crate_loader: &'a mut CrateLoader<'b>,
     after_expand: F,
-) -> Result<InnerExpansionResult<'a>, CompileIncomplete>
+) -> Result<InnerExpansionResult<'a, 'b>, CompileIncomplete>
 where
     F: FnOnce(&ast::Crate) -> CompileResult,
 {
@@ -1209,7 +1208,7 @@ pub fn phase_3_run_analysis_passes<'tcx, F, R>(
     codegen_backend: &dyn CodegenBackend,
     control: &CompileController,
     sess: &'tcx Session,
-    cstore: &'tcx CrateStoreDyn,
+    cstore: &'tcx CStore,
     hir_map: hir_map::Map<'tcx>,
     mut analysis: ty::CrateAnalysis,
     resolutions: Resolutions,

src/librustc_driver/lib.rs

@@ -78,7 +78,6 @@ use rustc::session::filesearch;
 use rustc::session::{early_error, early_warn};
 use rustc::lint::Lint;
 use rustc::lint;
-use rustc::middle::cstore::CrateStore;
 use rustc_metadata::locator;
 use rustc_metadata::cstore::CStore;
 use rustc_metadata::dynamic_lib::DynamicLibrary;
@@ -676,7 +675,7 @@ pub trait CompilerCalls<'a> {
                      _: &dyn CodegenBackend,
                      _: &getopts::Matches,
                      _: &Session,
-                     _: &dyn CrateStore,
+                     _: &CStore,
                      _: &Input,
                      _: &Option<PathBuf>,
                      _: &Option<PathBuf>)
@@ -884,7 +883,7 @@ impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
                      codegen_backend: &dyn CodegenBackend,
                      matches: &getopts::Matches,
                      sess: &Session,
-                     cstore: &dyn CrateStore,
+                     cstore: &CStore,
                      input: &Input,
                      odir: &Option<PathBuf>,
                      ofile: &Option<PathBuf>)
@@ -990,7 +989,7 @@ pub fn enable_save_analysis(control: &mut CompileController) {
 
 impl RustcDefaultCalls {
     pub fn list_metadata(sess: &Session,
-                         cstore: &dyn CrateStore,
+                         cstore: &CStore,
                          matches: &getopts::Matches,
                          input: &Input)
                          -> Compilation {
@@ -1002,7 +1001,7 @@ impl RustcDefaultCalls {
                     let mut v = Vec::new();
                     locator::list_file_metadata(&sess.target.target,
                                                 path,
-                                                cstore.metadata_loader(),
+                                                &*cstore.metadata_loader,
                                                 &mut v)
                             .unwrap();
                     println!("{}", String::from_utf8(v).unwrap());

src/librustc_driver/pretty.rs

@@ -20,11 +20,11 @@ use {abort_on_err, driver};
 use rustc::ty::{self, TyCtxt, Resolutions, AllArenas};
 use rustc::cfg;
 use rustc::cfg::graphviz::LabelledCFG;
-use rustc::middle::cstore::CrateStoreDyn;
 use rustc::session::Session;
 use rustc::session::config::{Input, OutputFilenames};
 use rustc_borrowck as borrowck;
 use rustc_borrowck::graphviz as borrowck_dot;
+use rustc_metadata::cstore::CStore;
 
 use rustc_mir::util::{write_mir_pretty, write_mir_graphviz};
 
@@ -199,7 +199,7 @@ impl PpSourceMode {
     }
     fn call_with_pp_support_hir<'tcx, A, F>(&self,
                                                sess: &'tcx Session,
-                                               cstore: &'tcx CrateStoreDyn,
+                                               cstore: &'tcx CStore,
                                                hir_map: &hir_map::Map<'tcx>,
                                                analysis: &ty::CrateAnalysis,
                                                resolutions: &Resolutions,
@@ -918,7 +918,7 @@ pub fn print_after_parsing(sess: &Session,
 }
 
 pub fn print_after_hir_lowering<'tcx, 'a: 'tcx>(sess: &'a Session,
-                                                cstore: &'tcx CrateStoreDyn,
+                                                cstore: &'tcx CStore,
                                                 hir_map: &hir_map::Map<'tcx>,
                                                 analysis: &ty::CrateAnalysis,
                                                 resolutions: &Resolutions,
@@ -1074,7 +1074,7 @@ pub fn print_after_hir_lowering<'tcx, 'a: 'tcx>(sess: &'a Session,
 // with a different callback than the standard driver, so that isn't easy.
 // Instead, we call that function ourselves.
 fn print_with_analysis<'tcx, 'a: 'tcx>(sess: &'a Session,
-                                       cstore: &'a CrateStoreDyn,
+                                       cstore: &'a CStore,
                                        hir_map: &hir_map::Map<'tcx>,
                                        analysis: &ty::CrateAnalysis,
                                        resolutions: &Resolutions,

src/librustc_metadata/Cargo.toml

@@ -20,3 +20,4 @@ serialize = { path = "../libserialize" }
 syntax = { path = "../libsyntax" }
 syntax_ext = { path = "../libsyntax_ext" }
 syntax_pos = { path = "../libsyntax_pos" }
+rustc_metadata_utils = { path = "../librustc_metadata_utils" }

src/librustc_metadata/creader.rs

@@ -24,12 +24,13 @@ use rustc::session::{Session, CrateDisambiguator};
 use rustc::session::config::{Sanitizer, self};
 use rustc_target::spec::{PanicStrategy, TargetTriple};
 use rustc::session::search_paths::PathKind;
-use rustc::middle;
+use rustc::middle::cstore::{ExternCrate, ExternCrateSource};
-use rustc::middle::cstore::{validate_crate_name, ExternCrate, ExternCrateSource};
 use rustc::util::common::record_time;
 use rustc::util::nodemap::FxHashSet;
 use rustc::hir::map::Definitions;
 
+use rustc_metadata_utils::validate_crate_name;
+
 use std::ops::Deref;
 use std::path::PathBuf;
 use std::{cmp, fs};
@@ -1056,8 +1057,8 @@ impl<'a> CrateLoader<'a> {
     }
 }
 
-impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
+impl<'a> CrateLoader<'a> {
-    fn postprocess(&mut self, krate: &ast::Crate) {
+    pub fn postprocess(&mut self, krate: &ast::Crate) {
         // inject the sanitizer runtime before the allocator runtime because all
         // sanitizers force the use of the `alloc_system` allocator
         self.inject_sanitizer_runtime();
@@ -1070,7 +1071,9 @@ impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
         }
     }
 
-    fn process_extern_crate(&mut self, item: &ast::Item, definitions: &Definitions) -> CrateNum {
+    pub fn process_extern_crate(
+        &mut self, item: &ast::Item, definitions: &Definitions,
+    ) -> CrateNum {
         match item.node {
             ast::ItemKind::ExternCrate(orig_name) => {
                 debug!("resolving extern crate stmt. ident: {} orig_name: {:?}",
@@ -1113,7 +1116,7 @@ impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
         }
     }
 
-    fn process_path_extern(
+    pub fn process_path_extern(
         &mut self,
         name: Symbol,
         span: Span,
@@ -1137,7 +1140,7 @@ impl<'a> middle::cstore::CrateLoader for CrateLoader<'a> {
         cnum
     }
 
-    fn process_use_extern(
+    pub fn process_use_extern(
         &mut self,
         name: Symbol,
         span: Span,

src/librustc_metadata/cstore.rs

@@ -93,6 +93,11 @@ pub struct CStore {
     pub metadata_loader: Box<dyn MetadataLoader + Sync>,
 }
 
+pub enum LoadedMacro {
+    MacroDef(ast::Item),
+    ProcMacro(Lrc<SyntaxExtension>),
+}
+
 impl CStore {
     pub fn new(metadata_loader: Box<dyn MetadataLoader + Sync>) -> CStore {
         CStore {

src/librustc_metadata/cstore_impl.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use cstore;
+use cstore::{self, LoadedMacro};
 use encoder;
 use link_args;
 use native_libs;
@@ -17,8 +17,8 @@ use schema;
 
 use rustc::ty::query::QueryConfig;
 use rustc::middle::cstore::{CrateStore, DepKind,
-                            MetadataLoader, LinkMeta,
+                            LinkMeta,
-                            LoadedMacro, EncodedMetadata, NativeLibraryKind};
+                            EncodedMetadata, NativeLibraryKind};
 use rustc::middle::exported_symbols::ExportedSymbol;
 use rustc::middle::stability::DeprecationEntry;
 use rustc::hir::def;
@@ -411,36 +411,8 @@ pub fn provide<'tcx>(providers: &mut Providers<'tcx>) {
     };
 }
 
-impl CrateStore for cstore::CStore {
+impl cstore::CStore {
-    fn crate_data_as_rc_any(&self, krate: CrateNum) -> Lrc<dyn Any> {
+    pub fn export_macros_untracked(&self, cnum: CrateNum) {
-        self.get_crate_data(krate)
-    }
-
-    fn metadata_loader(&self) -> &dyn MetadataLoader {
-        &*self.metadata_loader
-    }
-
-    fn visibility_untracked(&self, def: DefId) -> ty::Visibility {
-        self.get_crate_data(def.krate).get_visibility(def.index)
-    }
-
-    fn item_generics_cloned_untracked(&self, def: DefId, sess: &Session) -> ty::Generics {
-        self.get_crate_data(def.krate).get_generics(def.index, sess)
-    }
-
-    fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssociatedItem
-    {
-        self.get_crate_data(def.krate).get_associated_item(def.index)
-    }
-
-    fn dep_kind_untracked(&self, cnum: CrateNum) -> DepKind
-    {
-        let data = self.get_crate_data(cnum);
-        let r = *data.dep_kind.lock();
-        r
-    }
-
-    fn export_macros_untracked(&self, cnum: CrateNum) {
         let data = self.get_crate_data(cnum);
         let mut dep_kind = data.dep_kind.lock();
         if *dep_kind == DepKind::UnexportedMacrosOnly {
@@ -448,69 +420,28 @@ impl CrateStore for cstore::CStore {
         }
     }
 
-    fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol
+    pub fn dep_kind_untracked(&self, cnum: CrateNum) -> DepKind {
-    {
+        let data = self.get_crate_data(cnum);
-        self.get_crate_data(cnum).name
+        let r = *data.dep_kind.lock();
+        r
     }
 
-    fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator
+    pub fn crate_edition_untracked(&self, cnum: CrateNum) -> Edition {
-    {
-        self.get_crate_data(cnum).root.disambiguator
-    }
-
-    fn crate_hash_untracked(&self, cnum: CrateNum) -> hir::svh::Svh
-    {
-        self.get_crate_data(cnum).root.hash
-    }
-
-    fn crate_edition_untracked(&self, cnum: CrateNum) -> Edition
-    {
         self.get_crate_data(cnum).root.edition
     }
 
-    /// Returns the `DefKey` for a given `DefId`. This indicates the
+    pub fn struct_field_names_untracked(&self, def: DefId) -> Vec<ast::Name> {
-    /// parent `DefId` as well as some idea of what kind of data the
-    /// `DefId` refers to.
-    fn def_key(&self, def: DefId) -> DefKey {
-        // Note: loading the def-key (or def-path) for a def-id is not
-        // a *read* of its metadata. This is because the def-id is
-        // really just an interned shorthand for a def-path, which is the
-        // canonical name for an item.
-        //
-        // self.dep_graph.read(DepNode::MetaData(def));
-        self.get_crate_data(def.krate).def_key(def.index)
-    }
-
-    fn def_path(&self, def: DefId) -> DefPath {
-        // See `Note` above in `def_key()` for why this read is
-        // commented out:
-        //
-        // self.dep_graph.read(DepNode::MetaData(def));
-        self.get_crate_data(def.krate).def_path(def.index)
-    }
-
-    fn def_path_hash(&self, def: DefId) -> DefPathHash {
-        self.get_crate_data(def.krate).def_path_hash(def.index)
-    }
-
-    fn def_path_table(&self, cnum: CrateNum) -> Lrc<DefPathTable> {
-        self.get_crate_data(cnum).def_path_table.clone()
-    }
-
-    fn struct_field_names_untracked(&self, def: DefId) -> Vec<ast::Name>
-    {
         self.get_crate_data(def.krate).get_struct_field_names(def.index)
     }
 
-    fn item_children_untracked(&self, def_id: DefId, sess: &Session) -> Vec<def::Export>
+    pub fn item_children_untracked(&self, def_id: DefId, sess: &Session) -> Vec<def::Export> {
-    {
         let mut result = vec![];
         self.get_crate_data(def_id.krate)
             .each_child_of_item(def_id.index, |child| result.push(child), sess);
         result
     }
 
-    fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
+    pub fn load_macro_untracked(&self, id: DefId, sess: &Session) -> LoadedMacro {
         let data = self.get_crate_data(id.krate);
         if let Some(ref proc_macros) = data.proc_macros {
             return LoadedMacro::ProcMacro(proc_macros[id.index.to_proc_macro_index()].1.clone());
@@ -559,6 +490,64 @@ impl CrateStore for cstore::CStore {
         })
     }
 
+    pub fn associated_item_cloned_untracked(&self, def: DefId) -> ty::AssociatedItem {
+        self.get_crate_data(def.krate).get_associated_item(def.index)
+    }
+}
+
+impl CrateStore for cstore::CStore {
+    fn crate_data_as_rc_any(&self, krate: CrateNum) -> Lrc<dyn Any> {
+        self.get_crate_data(krate)
+    }
+
+    fn item_generics_cloned_untracked(&self, def: DefId, sess: &Session) -> ty::Generics {
+        self.get_crate_data(def.krate).get_generics(def.index, sess)
+    }
+
+    fn crate_name_untracked(&self, cnum: CrateNum) -> Symbol
+    {
+        self.get_crate_data(cnum).name
+    }
+
+    fn crate_disambiguator_untracked(&self, cnum: CrateNum) -> CrateDisambiguator
+    {
+        self.get_crate_data(cnum).root.disambiguator
+    }
+
+    fn crate_hash_untracked(&self, cnum: CrateNum) -> hir::svh::Svh
+    {
+        self.get_crate_data(cnum).root.hash
+    }
+
+    /// Returns the `DefKey` for a given `DefId`. This indicates the
+    /// parent `DefId` as well as some idea of what kind of data the
+    /// `DefId` refers to.
+    fn def_key(&self, def: DefId) -> DefKey {
+        // Note: loading the def-key (or def-path) for a def-id is not
+        // a *read* of its metadata. This is because the def-id is
+        // really just an interned shorthand for a def-path, which is the
+        // canonical name for an item.
+        //
+        // self.dep_graph.read(DepNode::MetaData(def));
+        self.get_crate_data(def.krate).def_key(def.index)
+    }
+
+    fn def_path(&self, def: DefId) -> DefPath {
+        // See `Note` above in `def_key()` for why this read is
+        // commented out:
+        //
+        // self.dep_graph.read(DepNode::MetaData(def));
+        self.get_crate_data(def.krate).def_path(def.index)
+    }
+
+    fn def_path_hash(&self, def: DefId) -> DefPathHash {
+        self.get_crate_data(def.krate).def_path_hash(def.index)
+    }
+
+    fn def_path_table(&self, cnum: CrateNum) -> Lrc<DefPathTable> {
+        self.get_crate_data(cnum).def_path_table.clone()
+    }
+
     fn crates_untracked(&self) -> Vec<CrateNum>
     {
         let mut result = vec![];

src/librustc_metadata/lib.rs

@@ -37,6 +37,7 @@ extern crate serialize as rustc_serialize; // used by deriving
 extern crate rustc_errors as errors;
 extern crate syntax_ext;
 extern crate proc_macro;
+extern crate rustc_metadata_utils;
 
 #[macro_use]
 extern crate rustc;

src/librustc_metadata_utils/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+authors = ["The Rust Project Developers"]
+name = "rustc_metadata_utils"
+version = "0.0.0"
+
+[lib]
+name = "rustc_metadata_utils"
+path = "lib.rs"
+crate-type = ["dylib"]
+
+[dependencies]
+rustc = { path = "../librustc" }
+syntax = { path = "../libsyntax" }
+syntax_pos = { path = "../libsyntax_pos" }

src/librustc_metadata_utils/lib.rs

@@ -0,0 +1,42 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate rustc;
+extern crate syntax_pos;
+
+use rustc::session::Session;
+use syntax_pos::Span;
+
+pub fn validate_crate_name(sess: Option<&Session>, s: &str, sp: Option<Span>) {
+    let mut err_count = 0;
+    {
+        let mut say = |s: &str| {
+            match (sp, sess) {
+                (_, None) => bug!("{}", s),
+                (Some(sp), Some(sess)) => sess.span_err(sp, s),
+                (None, Some(sess)) => sess.err(s),
+            }
+            err_count += 1;
+        };
+        if s.is_empty() {
+            say("crate name must not be empty");
+        }
+        for c in s.chars() {
+            if c.is_alphanumeric() { continue }
+            if c == '_'  { continue }
+            say(&format!("invalid character `{}` in crate name: `{}`", c, s));
+        }
+    }
+
+    if err_count > 0 {
+        sess.unwrap().abort_if_errors();
+    }
+}

src/librustc_resolve/Cargo.toml

@@ -17,3 +17,4 @@ arena = { path = "../libarena" }
 rustc_errors = { path = "../librustc_errors" }
 syntax_pos = { path = "../libsyntax_pos" }
 rustc_data_structures = { path = "../librustc_data_structures" }
+rustc_metadata = { path = "../librustc_metadata" }

src/librustc_resolve/build_reduced_graph.rs

@@ -21,10 +21,11 @@ use {PerNS, Resolver, ResolverArenas};
 use Namespace::{self, TypeNS, ValueNS, MacroNS};
 use {resolve_error, resolve_struct_error, ResolutionError};
 
-use rustc::middle::cstore::LoadedMacro;
 use rustc::hir::def::*;
 use rustc::hir::def_id::{BUILTIN_MACROS_CRATE, CRATE_DEF_INDEX, LOCAL_CRATE, DefId};
 use rustc::ty;
+use rustc::middle::cstore::CrateStore;
+use rustc_metadata::cstore::LoadedMacro;
 
 use std::cell::Cell;
 use rustc_data_structures::sync::Lrc;
@@ -86,7 +87,7 @@ struct LegacyMacroImports {
     imports: Vec<(Name, Span)>,
 }
 
-impl<'a> Resolver<'a> {
+impl<'a, 'cl> Resolver<'a, 'cl> {
     /// Defines `name` in namespace `ns` of module `parent` to be `def` if it is not yet defined;
     /// otherwise, reports an error.
     pub fn define<T>(&mut self, parent: Module<'a>, ident: Ident, ns: Namespace, def: T)
@@ -776,13 +777,13 @@ impl<'a> Resolver<'a> {
     }
 }
 
-pub struct BuildReducedGraphVisitor<'a, 'b: 'a> {
+pub struct BuildReducedGraphVisitor<'a, 'b: 'a, 'c: 'b> {
-    pub resolver: &'a mut Resolver<'b>,
+    pub resolver: &'a mut Resolver<'b, 'c>,
     pub legacy_scope: LegacyScope<'b>,
     pub expansion: Mark,
 }
 
-impl<'a, 'b> BuildReducedGraphVisitor<'a, 'b> {
+impl<'a, 'b, 'cl> BuildReducedGraphVisitor<'a, 'b, 'cl> {
     fn visit_invoc(&mut self, id: ast::NodeId) -> &'b InvocationData<'b> {
         let mark = id.placeholder_to_mark();
         self.resolver.current_module.unresolved_invocations.borrow_mut().insert(mark);
@@ -806,7 +807,7 @@ macro_rules! method {
     }
 }
 
-impl<'a, 'b> Visitor<'a> for BuildReducedGraphVisitor<'a, 'b> {
+impl<'a, 'b, 'cl> Visitor<'a> for BuildReducedGraphVisitor<'a, 'b, 'cl> {
     method!(visit_impl_item: ast::ImplItem, ast::ImplItemKind::Macro, walk_impl_item);
     method!(visit_expr:      ast::Expr,     ast::ExprKind::Mac,       walk_expr);
     method!(visit_pat:       ast::Pat,      ast::PatKind::Mac,        walk_pat);

src/librustc_resolve/check_unused.rs

@@ -31,8 +31,8 @@ use syntax::visit::{self, Visitor};
 use syntax_pos::{Span, MultiSpan, DUMMY_SP};
 
 
-struct UnusedImportCheckVisitor<'a, 'b: 'a> {
+struct UnusedImportCheckVisitor<'a, 'b: 'a, 'd: 'b> {
-    resolver: &'a mut Resolver<'b>,
+    resolver: &'a mut Resolver<'b, 'd>,
     /// All the (so far) unused imports, grouped path list
     unused_imports: NodeMap<NodeMap<Span>>,
     base_id: ast::NodeId,
@@ -40,21 +40,21 @@ struct UnusedImportCheckVisitor<'a, 'b: 'a> {
 }
 
 // Deref and DerefMut impls allow treating UnusedImportCheckVisitor as Resolver.
-impl<'a, 'b> Deref for UnusedImportCheckVisitor<'a, 'b> {
+impl<'a, 'b, 'd> Deref for UnusedImportCheckVisitor<'a, 'b, 'd> {
-    type Target = Resolver<'b>;
+    type Target = Resolver<'b, 'd>;
 
-    fn deref<'c>(&'c self) -> &'c Resolver<'b> {
+    fn deref<'c>(&'c self) -> &'c Resolver<'b, 'd> {
         &*self.resolver
     }
 }
 
-impl<'a, 'b> DerefMut for UnusedImportCheckVisitor<'a, 'b> {
+impl<'a, 'b, 'd> DerefMut for UnusedImportCheckVisitor<'a, 'b, 'd> {
-    fn deref_mut<'c>(&'c mut self) -> &'c mut Resolver<'b> {
+    fn deref_mut<'c>(&'c mut self) -> &'c mut Resolver<'b, 'd> {
         &mut *self.resolver
     }
 }
 
-impl<'a, 'b> UnusedImportCheckVisitor<'a, 'b> {
+impl<'a, 'b, 'd> UnusedImportCheckVisitor<'a, 'b, 'd> {
     // We have information about whether `use` (import) directives are actually
     // used now. If an import is not used at all, we signal a lint error.
     fn check_import(&mut self, item_id: ast::NodeId, id: ast::NodeId, span: Span) {
@@ -77,7 +77,7 @@ impl<'a, 'b> UnusedImportCheckVisitor<'a, 'b> {
     }
 }
 
-impl<'a, 'b> Visitor<'a> for UnusedImportCheckVisitor<'a, 'b> {
+impl<'a, 'b, 'cl> Visitor<'a> for UnusedImportCheckVisitor<'a, 'b, 'cl> {
     fn visit_item(&mut self, item: &'a ast::Item) {
         self.item_span = item.span;
 

src/librustc_resolve/lib.rs

@@ -26,6 +26,7 @@ extern crate arena;
 #[macro_use]
 extern crate rustc;
 extern crate rustc_data_structures;
+extern crate rustc_metadata;
 
 pub use rustc::hir::def::{Namespace, PerNS};
 
@@ -34,7 +35,7 @@ use self::RibKind::*;
 
 use rustc::hir::map::{Definitions, DefCollector};
 use rustc::hir::{self, PrimTy, TyBool, TyChar, TyFloat, TyInt, TyUint, TyStr};
-use rustc::middle::cstore::{CrateStore, CrateLoader};
+use rustc::middle::cstore::CrateStore;
 use rustc::session::Session;
 use rustc::lint;
 use rustc::hir::def::*;
@@ -44,6 +45,9 @@ use rustc::ty;
 use rustc::hir::{Freevar, FreevarMap, TraitCandidate, TraitMap, GlobMap};
 use rustc::util::nodemap::{NodeMap, NodeSet, FxHashMap, FxHashSet, DefIdMap};
 
+use rustc_metadata::creader::CrateLoader;
+use rustc_metadata::cstore::CStore;
+
 use syntax::codemap::CodeMap;
 use syntax::ext::hygiene::{Mark, Transparency, SyntaxContext};
 use syntax::ast::{self, Name, NodeId, Ident, FloatTy, IntTy, UintTy};
@@ -687,7 +691,7 @@ impl<'tcx> Visitor<'tcx> for UsePlacementFinder {
 }
 
 /// This thing walks the whole crate in DFS manner, visiting each item, resolving names as it goes.
-impl<'a, 'tcx> Visitor<'tcx> for Resolver<'a> {
+impl<'a, 'tcx, 'cl> Visitor<'tcx> for Resolver<'a, 'cl> {
     fn visit_item(&mut self, item: &'tcx Item) {
         self.resolve_item(item);
     }
@@ -1176,7 +1180,7 @@ impl<'a> NameBinding<'a> {
         }
     }
 
-    fn get_macro(&self, resolver: &mut Resolver<'a>) -> Lrc<SyntaxExtension> {
+    fn get_macro<'b: 'a>(&self, resolver: &mut Resolver<'a, 'b>) -> Lrc<SyntaxExtension> {
         resolver.get_macro(self.def_ignoring_ambiguity())
     }
 
@@ -1291,9 +1295,9 @@ impl PrimitiveTypeTable {
 /// The main resolver class.
 ///
 /// This is the visitor that walks the whole crate.
-pub struct Resolver<'a> {
+pub struct Resolver<'a, 'b: 'a> {
     session: &'a Session,
-    cstore: &'a dyn CrateStore,
+    cstore: &'a CStore,
 
     pub definitions: Definitions,
 
@@ -1389,7 +1393,7 @@ pub struct Resolver<'a> {
     /// true if `#![feature(use_extern_macros)]`
     use_extern_macros: bool,
 
-    crate_loader: &'a mut dyn CrateLoader,
+    crate_loader: &'a mut CrateLoader<'b>,
     macro_names: FxHashSet<Ident>,
     macro_prelude: FxHashMap<Name, &'a NameBinding<'a>>,
     pub all_macros: FxHashMap<Name, Def>,
@@ -1473,7 +1477,7 @@ impl<'a> ResolverArenas<'a> {
     }
 }
 
-impl<'a, 'b: 'a> ty::DefIdTree for &'a Resolver<'b> {
+impl<'a, 'b: 'a, 'cl: 'b> ty::DefIdTree for &'a Resolver<'b, 'cl> {
     fn parent(self, id: DefId) -> Option<DefId> {
         match id.krate {
             LOCAL_CRATE => self.definitions.def_key(id.index).parent,
@@ -1484,7 +1488,7 @@ impl<'a, 'b: 'a> ty::DefIdTree for &'a Resolver<'b> {
 
 /// This interface is used through the AST→HIR step, to embed full paths into the HIR. After that
 /// the resolver is no longer needed as all the relevant information is inline.
-impl<'a> hir::lowering::Resolver for Resolver<'a> {
+impl<'a, 'cl> hir::lowering::Resolver for Resolver<'a, 'cl> {
     fn resolve_hir_path(&mut self, path: &mut hir::Path, is_value: bool) {
         self.resolve_hir_path_cb(path, is_value,
                                  |resolver, span, error| resolve_error(resolver, span, error))
@@ -1537,7 +1541,7 @@ impl<'a> hir::lowering::Resolver for Resolver<'a> {
     }
 }
 
-impl<'a> Resolver<'a> {
+impl<'a, 'crateloader> Resolver<'a, 'crateloader> {
     /// Rustdoc uses this to resolve things in a recoverable way. ResolutionError<'a>
     /// isn't something that can be returned because it can't be made to live that long,
     /// and also it's a private type. Fortunately rustdoc doesn't need to know the error,
@@ -1603,15 +1607,15 @@ impl<'a> Resolver<'a> {
     }
 }
 
-impl<'a> Resolver<'a> {
+impl<'a, 'crateloader: 'a> Resolver<'a, 'crateloader> {
     pub fn new(session: &'a Session,
-               cstore: &'a dyn CrateStore,
+               cstore: &'a CStore,
                krate: &Crate,
                crate_name: &str,
                make_glob_map: MakeGlobMap,
-               crate_loader: &'a mut dyn CrateLoader,
+               crate_loader: &'a mut CrateLoader<'crateloader>,
                arenas: &'a ResolverArenas<'a>)
-               -> Resolver<'a> {
+               -> Resolver<'a, 'crateloader> {
         let root_def_id = DefId::local(CRATE_DEF_INDEX);
         let root_module_kind = ModuleKind::Def(Def::Mod(root_def_id), keywords::Invalid.name());
         let graph_root = arenas.alloc_module(ModuleData {

src/librustc_resolve/macros.rs

@@ -18,6 +18,7 @@ use rustc::hir::def_id::{DefId, BUILTIN_MACROS_CRATE, CRATE_DEF_INDEX, DefIndex,
 use rustc::hir::def::{Def, Export};
 use rustc::hir::map::{self, DefCollector};
 use rustc::{ty, lint};
+use rustc::middle::cstore::CrateStore;
 use syntax::ast::{self, Name, Ident};
 use syntax::attr::{self, HasAttrs};
 use syntax::errors::DiagnosticBuilder;
@@ -117,7 +118,7 @@ impl<'a> MacroBinding<'a> {
     }
 }
 
-impl<'a> base::Resolver for Resolver<'a> {
+impl<'a, 'crateloader: 'a> base::Resolver for Resolver<'a, 'crateloader> {
     fn next_node_id(&mut self) -> ast::NodeId {
         self.session.next_node_id()
     }
@@ -135,9 +136,11 @@ impl<'a> base::Resolver for Resolver<'a> {
     }
 
     fn eliminate_crate_var(&mut self, item: P<ast::Item>) -> P<ast::Item> {
-        struct EliminateCrateVar<'b, 'a: 'b>(&'b mut Resolver<'a>, Span);
+        struct EliminateCrateVar<'b, 'a: 'b, 'crateloader: 'a>(
+            &'b mut Resolver<'a, 'crateloader>, Span
+        );
 
-        impl<'a, 'b> Folder for EliminateCrateVar<'a, 'b> {
+        impl<'a, 'b, 'crateloader> Folder for EliminateCrateVar<'a, 'b, 'crateloader> {
             fn fold_path(&mut self, path: ast::Path) -> ast::Path {
                 match self.fold_qpath(None, path) {
                     (None, path) => path,
@@ -387,7 +390,7 @@ impl<'a> base::Resolver for Resolver<'a> {
     }
 }
 
-impl<'a> Resolver<'a> {
+impl<'a, 'cl> Resolver<'a, 'cl> {
     fn report_proc_macro_stub(&self, span: Span) {
         self.session.span_err(span,
                               "can't use a procedural macro from the same crate that defines it");

src/librustc_resolve/resolve_imports.rs

@@ -123,7 +123,7 @@ impl<'a> NameResolution<'a> {
     }
 }
 
-impl<'a> Resolver<'a> {
+impl<'a, 'crateloader> Resolver<'a, 'crateloader> {
     fn resolution(&self, module: Module<'a>, ident: Ident, ns: Namespace)
                   -> &'a RefCell<NameResolution<'a>> {
         *module.resolutions.borrow_mut().entry((ident.modern(), ns))
@@ -402,7 +402,7 @@ impl<'a> Resolver<'a> {
     // If the resolution becomes a success, define it in the module's glob importers.
     fn update_resolution<T, F>(&mut self, module: Module<'a>, ident: Ident, ns: Namespace, f: F)
                                -> T
-        where F: FnOnce(&mut Resolver<'a>, &mut NameResolution<'a>) -> T
+        where F: FnOnce(&mut Resolver<'a, 'crateloader>, &mut NameResolution<'a>) -> T
     {
         // Ensure that `resolution` isn't borrowed when defining in the module's glob importers,
         // during which the resolution might end up getting re-defined via a glob cycle.
@@ -453,30 +453,30 @@ impl<'a> Resolver<'a> {
     }
 }
 
-pub struct ImportResolver<'a, 'b: 'a> {
+pub struct ImportResolver<'a, 'b: 'a, 'c: 'a + 'b> {
-    pub resolver: &'a mut Resolver<'b>,
+    pub resolver: &'a mut Resolver<'b, 'c>,
 }
 
-impl<'a, 'b: 'a> ::std::ops::Deref for ImportResolver<'a, 'b> {
+impl<'a, 'b: 'a, 'c: 'a + 'b> ::std::ops::Deref for ImportResolver<'a, 'b, 'c> {
-    type Target = Resolver<'b>;
+    type Target = Resolver<'b, 'c>;
-    fn deref(&self) -> &Resolver<'b> {
+    fn deref(&self) -> &Resolver<'b, 'c> {
         self.resolver
     }
 }
 
-impl<'a, 'b: 'a> ::std::ops::DerefMut for ImportResolver<'a, 'b> {
+impl<'a, 'b: 'a, 'c: 'a + 'b> ::std::ops::DerefMut for ImportResolver<'a, 'b, 'c> {
-    fn deref_mut(&mut self) -> &mut Resolver<'b> {
+    fn deref_mut(&mut self) -> &mut Resolver<'b, 'c> {
         self.resolver
     }
 }
 
-impl<'a, 'b: 'a> ty::DefIdTree for &'a ImportResolver<'a, 'b> {
+impl<'a, 'b: 'a, 'c: 'a + 'b> ty::DefIdTree for &'a ImportResolver<'a, 'b, 'c> {
     fn parent(self, id: DefId) -> Option<DefId> {
         self.resolver.parent(id)
     }
 }
 
-impl<'a, 'b:'a> ImportResolver<'a, 'b> {
+impl<'a, 'b:'a, 'c: 'b> ImportResolver<'a, 'b, 'c> {
     // Import resolution
     //
     // This is a fixed-point algorithm. We resolve imports until our efforts

src/librustdoc/clean/auto_trait.rs

@@ -13,6 +13,7 @@ use rustc::traits::{self, auto_trait as auto};
 use rustc::ty::{self, ToPredicate, TypeFoldable};
 use rustc::ty::subst::Subst;
 use rustc::infer::InferOk;
+use rustc::middle::cstore::CrateStore;
 use std::fmt::Debug;
 use syntax_pos::DUMMY_SP;
 
@@ -20,13 +21,13 @@ use core::DocAccessLevels;
 
 use super::*;
 
-pub struct AutoTraitFinder<'a, 'tcx: 'a, 'rcx: 'a> {
+pub struct AutoTraitFinder<'a, 'tcx: 'a, 'rcx: 'a, 'cstore: 'rcx> {
-    pub cx: &'a core::DocContext<'a, 'tcx, 'rcx>,
+    pub cx: &'a core::DocContext<'a, 'tcx, 'rcx, 'cstore>,
     pub f: auto::AutoTraitFinder<'a, 'tcx>,
 }
 
-impl<'a, 'tcx, 'rcx> AutoTraitFinder<'a, 'tcx, 'rcx> {
+impl<'a, 'tcx, 'rcx, 'cstore> AutoTraitFinder<'a, 'tcx, 'rcx, 'cstore> {
-    pub fn new(cx: &'a core::DocContext<'a, 'tcx, 'rcx>) -> Self {
+    pub fn new(cx: &'a core::DocContext<'a, 'tcx, 'rcx, 'cstore>) -> Self {
         let f = auto::AutoTraitFinder::new(&cx.tcx);
 
         AutoTraitFinder { cx, f }

src/librustdoc/clean/inline.rs

@@ -19,7 +19,7 @@ use syntax_pos::Span;
 use rustc::hir;
 use rustc::hir::def::{Def, CtorKind};
 use rustc::hir::def_id::DefId;
-use rustc::middle::cstore::LoadedMacro;
+use rustc_metadata::cstore::LoadedMacro;
 use rustc::ty;
 use rustc::util::nodemap::FxHashSet;
 

src/librustdoc/clean/mod.rs

@@ -145,7 +145,7 @@ pub struct Crate {
     pub masked_crates: FxHashSet<CrateNum>,
 }
 
-impl<'a, 'tcx, 'rcx> Clean<Crate> for visit_ast::RustdocVisitor<'a, 'tcx, 'rcx> {
+impl<'a, 'tcx, 'rcx, 'cstore> Clean<Crate> for visit_ast::RustdocVisitor<'a, 'tcx, 'rcx, 'cstore> {
     fn clean(&self, cx: &DocContext) -> Crate {
         use ::visit_lib::LibEmbargoVisitor;
 

src/librustdoc/core.rs

@@ -13,7 +13,6 @@ use rustc_driver::{self, driver, target_features, abort_on_err};
 use rustc::session::{self, config};
 use rustc::hir::def_id::{DefId, CrateNum, LOCAL_CRATE};
 use rustc::hir::def::Def;
-use rustc::middle::cstore::CrateStore;
 use rustc::middle::privacy::AccessLevels;
 use rustc::ty::{self, TyCtxt, AllArenas};
 use rustc::hir::map as hir_map;
@@ -49,13 +48,13 @@ pub use rustc::session::search_paths::SearchPaths;
 
 pub type ExternalPaths = FxHashMap<DefId, (Vec<String>, clean::TypeKind)>;
 
-pub struct DocContext<'a, 'tcx: 'a, 'rcx: 'a> {
+pub struct DocContext<'a, 'tcx: 'a, 'rcx: 'a, 'cstore: 'rcx> {
     pub tcx: TyCtxt<'a, 'tcx, 'tcx>,
-    pub resolver: &'a RefCell<resolve::Resolver<'rcx>>,
+    pub resolver: &'a RefCell<resolve::Resolver<'rcx, 'cstore>>,
     /// The stack of module NodeIds up till this point
     pub mod_ids: RefCell<Vec<NodeId>>,
     pub crate_name: Option<String>,
-    pub cstore: Rc<dyn CrateStore>,
+    pub cstore: Rc<CStore>,
     pub populated_all_crate_impls: Cell<bool>,
     // Note that external items for which `doc(hidden)` applies to are shown as
     // non-reachable while local items aren't. This is because we're reusing
@@ -87,7 +86,7 @@ pub struct DocContext<'a, 'tcx: 'a, 'rcx: 'a> {
     pub all_traits: Vec<DefId>,
 }
 
-impl<'a, 'tcx, 'rcx> DocContext<'a, 'tcx, 'rcx> {
+impl<'a, 'tcx, 'rcx, 'cstore> DocContext<'a, 'tcx, 'rcx, 'cstore> {
     pub fn sess(&self) -> &session::Session {
         &self.tcx.sess
     }

src/librustdoc/visit_ast.rs

@@ -38,10 +38,10 @@ use doctree::*;
 // also, is there some reason that this doesn't use the 'visit'
 // framework from syntax?
 
-pub struct RustdocVisitor<'a, 'tcx: 'a, 'rcx: 'a> {
+pub struct RustdocVisitor<'a, 'tcx: 'a, 'rcx: 'a, 'cstore: 'rcx> {
     pub module: Module,
     pub attrs: hir::HirVec<ast::Attribute>,
-    pub cx: &'a core::DocContext<'a, 'tcx, 'rcx>,
+    pub cx: &'a core::DocContext<'a, 'tcx, 'rcx, 'cstore>,
     view_item_stack: FxHashSet<ast::NodeId>,
     inlining: bool,
     /// Is the current module and all of its parents public?
@@ -49,8 +49,10 @@ pub struct RustdocVisitor<'a, 'tcx: 'a, 'rcx: 'a> {
     exact_paths: Option<FxHashMap<DefId, Vec<String>>>,
 }
 
-impl<'a, 'tcx, 'rcx> RustdocVisitor<'a, 'tcx, 'rcx> {
+impl<'a, 'tcx, 'rcx, 'cstore> RustdocVisitor<'a, 'tcx, 'rcx, 'cstore> {
-    pub fn new(cx: &'a core::DocContext<'a, 'tcx, 'rcx>) -> RustdocVisitor<'a, 'tcx, 'rcx> {
+    pub fn new(
+        cx: &'a core::DocContext<'a, 'tcx, 'rcx, 'cstore>
+    ) -> RustdocVisitor<'a, 'tcx, 'rcx, 'cstore> {
         // If the root is re-exported, terminate all recursion.
         let mut stack = FxHashSet();
         stack.insert(ast::CRATE_NODE_ID);

src/librustdoc/visit_lib.rs

@@ -22,8 +22,8 @@ use clean::{AttributesExt, NestedAttributesExt};
 
 /// Similar to `librustc_privacy::EmbargoVisitor`, but also takes
 /// specific rustdoc annotations into account (i.e. `doc(hidden)`)
-pub struct LibEmbargoVisitor<'a, 'tcx: 'a, 'rcx: 'a> {
+pub struct LibEmbargoVisitor<'a, 'tcx: 'a, 'rcx: 'a, 'cstore: 'rcx> {
-    cx: &'a ::core::DocContext<'a, 'tcx, 'rcx>,
+    cx: &'a ::core::DocContext<'a, 'tcx, 'rcx, 'cstore>,
     // Accessibility levels for reachable nodes
     access_levels: RefMut<'a, AccessLevels<DefId>>,
     // Previous accessibility level, None means unreachable
@@ -32,8 +32,10 @@ pub struct LibEmbargoVisitor<'a, 'tcx: 'a, 'rcx: 'a> {
     visited_mods: FxHashSet<DefId>,
 }
 
-impl<'a, 'tcx, 'rcx> LibEmbargoVisitor<'a, 'tcx, 'rcx> {
+impl<'a, 'tcx, 'rcx, 'cstore> LibEmbargoVisitor<'a, 'tcx, 'rcx, 'cstore> {
-    pub fn new(cx: &'a ::core::DocContext<'a, 'tcx, 'rcx>) -> LibEmbargoVisitor<'a, 'tcx, 'rcx> {
+    pub fn new(
+        cx: &'a ::core::DocContext<'a, 'tcx, 'rcx, 'cstore>
+    ) -> LibEmbargoVisitor<'a, 'tcx, 'rcx, 'cstore> {
         LibEmbargoVisitor {
             cx,
             access_levels: cx.access_levels.borrow_mut(),

src/test/run-pass-fulldeps/compiler-calls.rs

@@ -21,12 +21,13 @@ extern crate rustc_driver;
 extern crate rustc_codegen_utils;
 extern crate syntax;
 extern crate rustc_errors as errors;
+extern crate rustc_metadata;
 
-use rustc::middle::cstore::CrateStore;
 use rustc::session::Session;
 use rustc::session::config::{self, Input};
 use rustc_driver::{driver, CompilerCalls, Compilation};
 use rustc_codegen_utils::codegen_backend::CodegenBackend;
+use rustc_metadata::cstore::CStore;
 use syntax::ast;
 
 use std::path::PathBuf;
@@ -51,7 +52,7 @@ impl<'a> CompilerCalls<'a> for TestCalls<'a> {
                      _: &CodegenBackend,
                      _: &getopts::Matches,
                      _: &Session,
-                     _: &CrateStore,
+                     _: &CStore,
                      _: &Input,
                      _: &Option<PathBuf>,
                      _: &Option<PathBuf>)