Rollup merge of rust-lang#41360 - nikomatsakis:incr-comp-issue-40746-visitors, r=eddyb

convert calls to `visit_all_item_likes_in_krate`

We no longer need to track the tasks in these cases since these
particular tasks have no outputs (except, potentially, errors...)  and
they always execute.

cc rust-lang#40746

r? @eddyb

Author: frewsxcv

src/librustc/dep_graph/dep_node.rs

@@ -56,30 +56,15 @@ pub enum DepNode<D: Clone + Debug> {
     WorkProduct(Arc<WorkProductId>),
 
     // Represents different phases in the compiler.
-    CollectLanguageItems,
-    ResolveLifetimes,
     RegionResolveCrate,
-    PluginRegistrar,
-    StabilityIndex,
-    CollectItem(D),
-    CollectItemSig(D),
     Coherence,
     Resolve,
-    EntryPoint,
-    CheckEntryFn,
     CoherenceCheckTrait(D),
     CoherenceCheckImpl(D),
     CoherenceOverlapCheck(D),
     CoherenceOverlapCheckSpecial(D),
-    CoherenceOrphanCheck(D),
     Variance,
-    WfCheck(D),
-    TypeckItemType(D),
-    UnusedTraitCheck,
-    CheckConst(D),
     PrivacyAccessLevels(CrateNum),
-    IntrinsicCheck(D),
-    MatchCheck(D),
 
     // Represents the MIR for a fn; also used as the task node for
     // things read/modify that MIR.
@@ -91,14 +76,10 @@ pub enum DepNode<D: Clone + Debug> {
     BorrowCheck(D),
     RvalueCheck(D),
     Reachability,
-    DeadCheck,
-    StabilityCheck(D),
     LateLintCheck,
-    TransCrate,
     TransCrateItem(D),
     TransInlinedItem(D),
     TransWriteMetadata,
-    LinkBinary,
 
     // Nodes representing bits of computed IR in the tcx. Each shared
     // table in the tcx (or elsewhere) maps to one of these
@@ -184,12 +165,10 @@ impl<D: Clone + Debug> DepNode<D> {
         }
 
         check! {
-            CollectItem,
             BorrowCheck,
             Hir,
             HirBody,
             TransCrateItem,
-            TypeckItemType,
             AssociatedItems,
             ItemSignature,
             AssociatedItemDefIds,
@@ -211,24 +190,14 @@ impl<D: Clone + Debug> DepNode<D> {
             BorrowCheckKrate => Some(BorrowCheckKrate),
             MirKrate => Some(MirKrate),
             TypeckBodiesKrate => Some(TypeckBodiesKrate),
-            CollectLanguageItems => Some(CollectLanguageItems),
-            ResolveLifetimes => Some(ResolveLifetimes),
             RegionResolveCrate => Some(RegionResolveCrate),
-            PluginRegistrar => Some(PluginRegistrar),
-            StabilityIndex => Some(StabilityIndex),
             Coherence => Some(Coherence),
             Resolve => Some(Resolve),
-            EntryPoint => Some(EntryPoint),
-            CheckEntryFn => Some(CheckEntryFn),
             Variance => Some(Variance),
-            UnusedTraitCheck => Some(UnusedTraitCheck),
             PrivacyAccessLevels(k) => Some(PrivacyAccessLevels(k)),
             Reachability => Some(Reachability),
-            DeadCheck => Some(DeadCheck),
             LateLintCheck => Some(LateLintCheck),
-            TransCrate => Some(TransCrate),
             TransWriteMetadata => Some(TransWriteMetadata),
-            LinkBinary => Some(LinkBinary),
 
             // work product names do not need to be mapped, because
             // they are always absolute.
@@ -237,26 +206,17 @@ impl<D: Clone + Debug> DepNode<D> {
             Hir(ref d) => op(d).map(Hir),
             HirBody(ref d) => op(d).map(HirBody),
             MetaData(ref d) => op(d).map(MetaData),
-            CollectItem(ref d) => op(d).map(CollectItem),
-            CollectItemSig(ref d) => op(d).map(CollectItemSig),
             CoherenceCheckTrait(ref d) => op(d).map(CoherenceCheckTrait),
             CoherenceCheckImpl(ref d) => op(d).map(CoherenceCheckImpl),
             CoherenceOverlapCheck(ref d) => op(d).map(CoherenceOverlapCheck),
             CoherenceOverlapCheckSpecial(ref d) => op(d).map(CoherenceOverlapCheckSpecial),
-            CoherenceOrphanCheck(ref d) => op(d).map(CoherenceOrphanCheck),
-            WfCheck(ref d) => op(d).map(WfCheck),
-            TypeckItemType(ref d) => op(d).map(TypeckItemType),
-            CheckConst(ref d) => op(d).map(CheckConst),
-            IntrinsicCheck(ref d) => op(d).map(IntrinsicCheck),
-            MatchCheck(ref d) => op(d).map(MatchCheck),
             Mir(ref d) => op(d).map(Mir),
             MirShim(ref def_ids) => {
                 let def_ids: Option<Vec<E>> = def_ids.iter().map(op).collect();
                 def_ids.map(MirShim)
             }
             BorrowCheck(ref d) => op(d).map(BorrowCheck),
             RvalueCheck(ref d) => op(d).map(RvalueCheck),
-            StabilityCheck(ref d) => op(d).map(StabilityCheck),
             TransCrateItem(ref d) => op(d).map(TransCrateItem),
             TransInlinedItem(ref d) => op(d).map(TransInlinedItem),
             AssociatedItems(ref d) => op(d).map(AssociatedItems),

src/librustc/middle/dead.rs

@@ -12,7 +12,6 @@
 // closely. The idea is that all reachable symbols are live, codes called
 // from live codes are live, and everything else is dead.
 
-use dep_graph::DepNode;
 use hir::map as hir_map;
 use hir::{self, PatKind};
 use hir::intravisit::{self, Visitor, NestedVisitorMap};
@@ -594,7 +593,6 @@ impl<'a, 'tcx> Visitor<'tcx> for DeadVisitor<'a, 'tcx> {
 }
 
 pub fn check_crate<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
-    let _task = tcx.dep_graph.in_task(DepNode::DeadCheck);
     let access_levels = &ty::queries::privacy_access_levels::get(tcx, DUMMY_SP, LOCAL_CRATE);
     let krate = tcx.hir.krate();
     let live_symbols = find_live(tcx, access_levels, krate);

src/librustc/middle/entry.rs

@@ -9,7 +9,6 @@
 // except according to those terms.
 
 
-use dep_graph::DepNode;
 use hir::map as hir_map;
 use hir::def_id::{CRATE_DEF_INDEX};
 use session::{config, Session};
@@ -57,8 +56,6 @@ impl<'a, 'tcx> ItemLikeVisitor<'tcx> for EntryContext<'a, 'tcx> {
 }
 
 pub fn find_entry_point(session: &Session, hir_map: &hir_map::Map) {
-    let _task = hir_map.dep_graph.in_task(DepNode::EntryPoint);
-
     let any_exe = session.crate_types.borrow().iter().any(|ty| {
         *ty == config::CrateTypeExecutable
     });

src/librustc/middle/intrinsicck.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use dep_graph::DepNode;
 use hir::def::Def;
 use hir::def_id::DefId;
 use infer::InferCtxt;
@@ -25,7 +24,7 @@ pub fn check_crate<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
     let mut visitor = ItemVisitor {
         tcx: tcx
     };
-    tcx.visit_all_item_likes_in_krate(DepNode::IntrinsicCheck, &mut visitor.as_deep_visitor());
+    tcx.hir.krate().visit_all_item_likes(&mut visitor.as_deep_visitor());
 }
 
 struct ItemVisitor<'a, 'tcx: 'a> {

src/librustc/middle/lang_items.rs

@@ -21,7 +21,6 @@
 
 pub use self::LangItem::*;
 
-use dep_graph::DepNode;
 use hir::map as hir_map;
 use session::Session;
 use hir::def_id::DefId;
@@ -236,7 +235,6 @@ pub fn extract(attrs: &[ast::Attribute]) -> Option<Symbol> {
 pub fn collect_language_items(session: &Session,
                               map: &hir_map::Map)
                               -> LanguageItems {
-    let _task = map.dep_graph.in_task(DepNode::CollectLanguageItems);
     let krate: &hir::Crate = map.krate();
     let mut collector = LanguageItemCollector::new(session, map);
     collector.collect(krate);

src/librustc/middle/resolve_lifetime.rs

@@ -15,7 +15,6 @@
 //! used between functions, and they operate in a purely top-down
 //! way. Therefore we break lifetime name resolution into a separate pass.
 
-use dep_graph::DepNode;
 use hir::map::Map;
 use session::Session;
 use hir::def::Def;
@@ -259,7 +258,6 @@ const ROOT_SCOPE: ScopeRef<'static> = &Scope::Root;
 pub fn krate(sess: &Session,
              hir_map: &Map)
              -> Result<NamedRegionMap, usize> {
-    let _task = hir_map.dep_graph.in_task(DepNode::ResolveLifetimes);
     let krate = hir_map.krate();
     let mut map = NamedRegionMap {
         defs: NodeMap(),

src/librustc/middle/stability.rs

@@ -13,7 +13,6 @@
 
 pub use self::StabilityLevel::*;
 
-use dep_graph::DepNode;
 use hir::map as hir_map;
 use lint;
 use hir::def::Def;
@@ -383,7 +382,6 @@ impl<'a, 'tcx> Index<'tcx> {
         // Put the active features into a map for quick lookup
         self.active_features = active_lib_features.iter().map(|&(ref s, _)| s.clone()).collect();
 
-        let _task = tcx.dep_graph.in_task(DepNode::StabilityIndex);
         let krate = tcx.hir.krate();
         let mut annotator = Annotator {
             tcx: tcx,
@@ -397,7 +395,6 @@ impl<'a, 'tcx> Index<'tcx> {
     }
 
     pub fn new(hir_map: &hir_map::Map) -> Index<'tcx> {
-        let _task = hir_map.dep_graph.in_task(DepNode::StabilityIndex);
         let krate = hir_map.krate();
 
         let mut is_staged_api = false;
@@ -424,7 +421,7 @@ impl<'a, 'tcx> Index<'tcx> {
 /// features and possibly prints errors.
 pub fn check_unstable_api_usage<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
     let mut checker = Checker { tcx: tcx };
-    tcx.visit_all_item_likes_in_krate(DepNode::StabilityCheck, &mut checker.as_deep_visitor());
+    tcx.hir.krate().visit_all_item_likes(&mut checker.as_deep_visitor());
 }
 
 struct Checker<'a, 'tcx: 'a> {
@@ -662,7 +659,6 @@ pub fn check_unused_or_stable_features<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
     let access_levels = &ty::queries::privacy_access_levels::get(tcx, DUMMY_SP, LOCAL_CRATE);
 
     if tcx.stability.borrow().staged_api[&LOCAL_CRATE] && tcx.sess.features.borrow().staged_api {
-        let _task = tcx.dep_graph.in_task(DepNode::StabilityIndex);
         let krate = tcx.hir.krate();
         let mut missing = MissingStabilityAnnotations {
             tcx: tcx,

src/librustc_const_eval/check_match.rs

@@ -14,8 +14,6 @@ use _match::WitnessPreference::*;
 
 use pattern::{Pattern, PatternContext, PatternError, PatternKind};
 
-use rustc::dep_graph::DepNode;
-
 use rustc::middle::expr_use_visitor::{ConsumeMode, Delegate, ExprUseVisitor};
 use rustc::middle::expr_use_visitor::{LoanCause, MutateMode};
 use rustc::middle::expr_use_visitor as euv;
@@ -56,8 +54,7 @@ impl<'a, 'tcx> Visitor<'tcx> for OuterVisitor<'a, 'tcx> {
 }
 
 pub fn check_crate<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
-    tcx.visit_all_item_likes_in_krate(DepNode::MatchCheck,
-                                      &mut OuterVisitor { tcx: tcx }.as_deep_visitor());
+    tcx.hir.krate().visit_all_item_likes(&mut OuterVisitor { tcx: tcx }.as_deep_visitor());
     tcx.sess.abort_if_errors();
 }
 

src/librustc_driver/derive_registrar.rs

@@ -8,15 +8,13 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use rustc::dep_graph::DepNode;
 use rustc::hir::itemlikevisit::ItemLikeVisitor;
 use rustc::hir::map::Map;
 use rustc::hir;
 use syntax::ast;
 use syntax::attr;
 
 pub fn find(hir_map: &Map) -> Option<ast::NodeId> {
-    let _task = hir_map.dep_graph.in_task(DepNode::PluginRegistrar);
     let krate = hir_map.krate();
 
     let mut finder = Finder { registrar: None };

src/librustc_mir/mir_map.rs

@@ -68,7 +68,7 @@ pub fn build_mir_for_crate<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
                 NestedVisitorMap::None
             }
         }
-        tcx.visit_all_item_likes_in_krate(DepNode::Mir, &mut GatherCtors {
+        tcx.hir.krate().visit_all_item_likes(&mut GatherCtors {
             tcx: tcx
         }.as_deep_visitor());
     }

src/librustc_passes/consts.rs

@@ -24,7 +24,6 @@
 // - It's not possible to take the address of a static item with unsafe interior. This is enforced
 // by borrowck::gather_loans
 
-use rustc::dep_graph::DepNode;
 use rustc::ty::cast::CastKind;
 use rustc_const_eval::ConstContext;
 use rustc::middle::const_val::ConstEvalErr;
@@ -459,15 +458,14 @@ fn check_adjustments<'a, 'tcx>(v: &mut CheckCrateVisitor<'a, 'tcx>, e: &hir::Exp
 }
 
 pub fn check_crate<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
-    tcx.visit_all_item_likes_in_krate(DepNode::CheckConst,
-                                      &mut CheckCrateVisitor {
-                                          tcx: tcx,
-                                          tables: &ty::TypeckTables::empty(),
-                                          in_fn: false,
-                                          promotable: false,
-                                          mut_rvalue_borrows: NodeSet(),
-                                          param_env: tcx.empty_parameter_environment(),
-                                      }.as_deep_visitor());
+    tcx.hir.krate().visit_all_item_likes(&mut CheckCrateVisitor {
+        tcx: tcx,
+        tables: &ty::TypeckTables::empty(),
+        in_fn: false,
+        promotable: false,
+        mut_rvalue_borrows: NodeSet(),
+        param_env: tcx.empty_parameter_environment(),
+    }.as_deep_visitor());
     tcx.sess.abort_if_errors();
 }
 

src/librustc_plugin/build.rs

@@ -14,7 +14,6 @@ use syntax::ast;
 use syntax::attr;
 use errors;
 use syntax_pos::Span;
-use rustc::dep_graph::DepNode;
 use rustc::hir::map::Map;
 use rustc::hir::itemlikevisit::ItemLikeVisitor;
 use rustc::hir;
@@ -44,7 +43,6 @@ impl<'v> ItemLikeVisitor<'v> for RegistrarFinder {
 pub fn find_plugin_registrar(diagnostic: &errors::Handler,
                              hir_map: &Map)
                              -> Option<ast::NodeId> {
-    let _task = hir_map.dep_graph.in_task(DepNode::PluginRegistrar);
     let krate = hir_map.krate();
 
     let mut finder = RegistrarFinder { registrars: Vec::new() };

src/librustc_trans/back/link.rs

@@ -192,8 +192,6 @@ pub fn link_binary(sess: &Session,
                    trans: &CrateTranslation,
                    outputs: &OutputFilenames,
                    crate_name: &str) -> Vec<PathBuf> {
-    let _task = sess.dep_graph.in_task(DepNode::LinkBinary);
-
     let mut out_filenames = Vec::new();
     for &crate_type in sess.crate_types.borrow().iter() {
         // Ignore executable crates if we have -Z no-trans, as they will error.

src/librustc_trans/base.rs

@@ -38,7 +38,7 @@ use rustc::hir::def_id::LOCAL_CRATE;
 use middle::lang_items::StartFnLangItem;
 use middle::cstore::EncodedMetadata;
 use rustc::ty::{self, Ty, TyCtxt};
-use rustc::dep_graph::{AssertDepGraphSafe, DepNode};
+use rustc::dep_graph::AssertDepGraphSafe;
 use rustc::middle::cstore::LinkMeta;
 use rustc::hir::map as hir_map;
 use rustc::util::common::time;
@@ -1057,8 +1057,6 @@ pub fn trans_crate<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                              analysis: ty::CrateAnalysis,
                              incremental_hashes_map: &IncrementalHashesMap)
                              -> CrateTranslation {
-    let _task = tcx.dep_graph.in_task(DepNode::TransCrate);
-
     // Be careful with this krate: obviously it gives access to the
     // entire contents of the krate. So if you push any subtasks of
     // `TransCrate`, you need to be careful to register "reads" of the

src/librustc_typeck/check/mod.rs

@@ -82,7 +82,6 @@ pub use self::compare_method::{compare_impl_method, compare_const_impl};
 use self::TupleArgumentsFlag::*;
 
 use astconv::AstConv;
-use dep_graph::DepNode;
 use fmt_macros::{Parser, Piece, Position};
 use hir::def::{Def, CtorKind};
 use hir::def_id::{CrateNum, DefId, LOCAL_CRATE};
@@ -577,14 +576,13 @@ impl<'a, 'tcx> ItemLikeVisitor<'tcx> for CheckItemTypesVisitor<'a, 'tcx> {
 pub fn check_wf_new<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) -> CompileResult {
     tcx.sess.track_errors(|| {
         let mut visit = wfcheck::CheckTypeWellFormedVisitor::new(tcx);
-        tcx.visit_all_item_likes_in_krate(DepNode::WfCheck, &mut visit.as_deep_visitor());
+        tcx.hir.krate().visit_all_item_likes(&mut visit.as_deep_visitor());
     })
 }
 
 pub fn check_item_types<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) -> CompileResult {
     tcx.sess.track_errors(|| {
-        tcx.visit_all_item_likes_in_krate(DepNode::TypeckItemType,
-                                          &mut CheckItemTypesVisitor { tcx });
+        tcx.hir.krate().visit_all_item_likes(&mut CheckItemTypesVisitor { tcx });
     })
 }
 

src/librustc_typeck/check_unused.rs

@@ -9,7 +9,6 @@
 // except according to those terms.
 
 use lint;
-use rustc::dep_graph::DepNode;
 use rustc::ty::TyCtxt;
 
 use syntax::ast;
@@ -62,8 +61,6 @@ impl<'a, 'tcx, 'v> ItemLikeVisitor<'v> for CheckVisitor<'a, 'tcx> {
 }
 
 pub fn check_crate<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
-    let _task = tcx.dep_graph.in_task(DepNode::UnusedTraitCheck);
-
     let mut used_trait_imports = DefIdSet();
     for &body_id in tcx.hir.krate().bodies.keys() {
         let item_id = tcx.hir.body_owner(body_id);