Auto merge of #89978 - cjgillot:qarray, r=Mark-Simulacrum

Merge the two depkind vtables

Knowledge of `DepKind`s is managed using two arrays containing flags (is_anon, eval_always, fingerprint_style), and function pointers (forcing and loading code).

This PR aims at merging the two arrays so as to reduce unneeded indirect calls and (hopefully) increase code locality.
r? `@ghost`

Author: bors

Diff for: Cargo.lock

@@ -4319,7 +4319,6 @@ dependencies = [
  "rustc_serialize",
  "rustc_session",
  "rustc_span",
- "tracing",
 ]
 
 [[package]]

Diff for: compiler/rustc_codegen_cranelift/src/driver/aot.rs

@@ -224,7 +224,7 @@ pub(crate) fn run_aot(
                     tcx,
                     (backend_config.clone(), cgu.name()),
                     module_codegen,
-                    rustc_middle::dep_graph::hash_result,
+                    Some(rustc_middle::dep_graph::hash_result),
                 );
 
                 if let Some((id, product)) = work_product {

Diff for: compiler/rustc_codegen_gcc/src/base.rs

@@ -59,7 +59,13 @@ pub fn compile_codegen_unit<'tcx>(tcx: TyCtxt<'tcx>, cgu_name: Symbol) -> (Modul
     let start_time = Instant::now();
 
     let dep_node = tcx.codegen_unit(cgu_name).codegen_dep_node(tcx);
-    let (module, _) = tcx.dep_graph.with_task(dep_node, tcx, cgu_name, module_codegen, dep_graph::hash_result);
+    let (module, _) = tcx.dep_graph.with_task(
+        dep_node,
+        tcx,
+        cgu_name,
+        module_codegen,
+        Some(dep_graph::hash_result),
+    );
     let time_to_codegen = start_time.elapsed();
     drop(prof_timer);
 

Diff for: compiler/rustc_codegen_llvm/src/base.rs

@@ -113,8 +113,13 @@ pub fn compile_codegen_unit(
     let start_time = Instant::now();
 
     let dep_node = tcx.codegen_unit(cgu_name).codegen_dep_node(tcx);
-    let (module, _) =
-        tcx.dep_graph.with_task(dep_node, tcx, cgu_name, module_codegen, dep_graph::hash_result);
+    let (module, _) = tcx.dep_graph.with_task(
+        dep_node,
+        tcx,
+        cgu_name,
+        module_codegen,
+        Some(dep_graph::hash_result),
+    );
     let time_to_codegen = start_time.elapsed();
 
     // We assume that the cost to run LLVM on a CGU is proportional to

Diff for: compiler/rustc_incremental/src/assert_dep_graph.rs

@@ -126,30 +126,36 @@ impl IfThisChanged<'tcx> {
             if attr.has_name(sym::rustc_if_this_changed) {
                 let dep_node_interned = self.argument(attr);
                 let dep_node = match dep_node_interned {
-                    None => DepNode::from_def_path_hash(def_path_hash, DepKind::hir_owner),
-                    Some(n) => match DepNode::from_label_string(&n.as_str(), def_path_hash) {
-                        Ok(n) => n,
-                        Err(()) => {
-                            self.tcx.sess.span_fatal(
-                                attr.span,
-                                &format!("unrecognized DepNode variant {:?}", n),
-                            );
+                    None => {
+                        DepNode::from_def_path_hash(self.tcx, def_path_hash, DepKind::hir_owner)
+                    }
+                    Some(n) => {
+                        match DepNode::from_label_string(self.tcx, &n.as_str(), def_path_hash) {
+                            Ok(n) => n,
+                            Err(()) => {
+                                self.tcx.sess.span_fatal(
+                                    attr.span,
+                                    &format!("unrecognized DepNode variant {:?}", n),
+                                );
+                            }
                         }
-                    },
+                    }
                 };
                 self.if_this_changed.push((attr.span, def_id.to_def_id(), dep_node));
             } else if attr.has_name(sym::rustc_then_this_would_need) {
                 let dep_node_interned = self.argument(attr);
                 let dep_node = match dep_node_interned {
-                    Some(n) => match DepNode::from_label_string(&n.as_str(), def_path_hash) {
-                        Ok(n) => n,
-                        Err(()) => {
-                            self.tcx.sess.span_fatal(
-                                attr.span,
-                                &format!("unrecognized DepNode variant {:?}", n),
-                            );
+                    Some(n) => {
+                        match DepNode::from_label_string(self.tcx, &n.as_str(), def_path_hash) {
+                            Ok(n) => n,
+                            Err(()) => {
+                                self.tcx.sess.span_fatal(
+                                    attr.span,
+                                    &format!("unrecognized DepNode variant {:?}", n),
+                                );
+                            }
                         }
-                    },
+                    }
                     None => {
                         self.tcx.sess.span_fatal(attr.span, "missing DepNode variant");
                     }

Diff for: compiler/rustc_incremental/src/persist/dirty_clean.rs

@@ -15,7 +15,7 @@
 use rustc_ast::{self as ast, Attribute, NestedMetaItem};
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir as hir;
-use rustc_hir::def_id::{DefId, LocalDefId};
+use rustc_hir::def_id::LocalDefId;
 use rustc_hir::intravisit;
 use rustc_hir::itemlikevisit::ItemLikeVisitor;
 use rustc_hir::Node as HirNode;
@@ -302,18 +302,6 @@ impl DirtyCleanVisitor<'tcx> {
         out
     }
 
-    fn dep_nodes<'l>(
-        &self,
-        labels: &'l Labels,
-        def_id: DefId,
-    ) -> impl Iterator<Item = DepNode> + 'l {
-        let def_path_hash = self.tcx.def_path_hash(def_id);
-        labels.iter().map(move |label| match DepNode::from_label_string(label, def_path_hash) {
-            Ok(dep_node) => dep_node,
-            Err(()) => unreachable!("label: {}", label),
-        })
-    }
-
     fn dep_node_str(&self, dep_node: &DepNode) -> String {
         if let Some(def_id) = dep_node.extract_def_id(self.tcx) {
             format!("{:?}({})", dep_node.kind, self.tcx.def_path_str(def_id))
@@ -345,16 +333,19 @@ impl DirtyCleanVisitor<'tcx> {
     }
 
     fn check_item(&mut self, item_id: LocalDefId, item_span: Span) {
+        let def_path_hash = self.tcx.def_path_hash(item_id.to_def_id());
         for attr in self.tcx.get_attrs(item_id.to_def_id()).iter() {
             let assertion = match self.assertion_maybe(item_id, attr) {
                 Some(a) => a,
                 None => continue,
             };
             self.checked_attrs.insert(attr.id);
-            for dep_node in self.dep_nodes(&assertion.clean, item_id.to_def_id()) {
+            for label in assertion.clean {
+                let dep_node = DepNode::from_label_string(self.tcx, &label, def_path_hash).unwrap();
                 self.assert_clean(item_span, dep_node);
             }
-            for dep_node in self.dep_nodes(&assertion.dirty, item_id.to_def_id()) {
+            for label in assertion.dirty {
+                let dep_node = DepNode::from_label_string(self.tcx, &label, def_path_hash).unwrap();
                 self.assert_dirty(item_span, dep_node);
             }
         }

Diff for: compiler/rustc_interface/src/passes.rs

@@ -838,6 +838,7 @@ pub fn create_global_ctxt<'tcx>(
                 dep_graph,
                 queries.on_disk_cache.as_ref().map(OnDiskCache::as_dyn),
                 queries.as_dyn(),
+                rustc_query_impl::query_callbacks(arena),
                 crate_name,
                 outputs,
             )

Diff for: compiler/rustc_middle/src/arena.rs

@@ -100,6 +100,8 @@ macro_rules! arena_types {
             // This is used to decode the &'tcx [Span] for InlineAsm's line_spans.
             [decode] span: rustc_span::Span,
             [decode] used_trait_imports: rustc_data_structures::fx::FxHashSet<rustc_hir::def_id::LocalDefId>,
+
+            [] dep_kind: rustc_middle::dep_graph::DepKindStruct,
         ], $tcx);
     )
 }