Auto merge of #122140 - oli-obk:track_errors13, r=davidtwco

Run a single huge par_body_owners instead of many small ones after each other.

This improves parallel rustc parallelism by avoiding the bottleneck after each individual `par_body_owners` (because it needs to wait for queries to finish, so if there is one long running one, a lot of cores will be idle while waiting for the single query).

compiler/rustc_hir_analysis/src/collect/type_of/opaque.rs

@@ -5,22 +5,20 @@ use rustc_hir::intravisit::{self, Visitor};
 use rustc_hir::{self as hir, def, Expr, ImplItem, Item, Node, TraitItem};
 use rustc_middle::hir::nested_filter;
 use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt};
-use rustc_span::{sym, ErrorGuaranteed, DUMMY_SP};
+use rustc_span::{sym, DUMMY_SP};
 
 use crate::errors::{TaitForwardCompat, TypeOf, UnconstrainedOpaqueType};
 
-pub fn test_opaque_hidden_types(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
-    let mut res = Ok(());
+pub fn test_opaque_hidden_types(tcx: TyCtxt<'_>) {
     if tcx.has_attr(CRATE_DEF_ID, sym::rustc_hidden_type_of_opaques) {
         for id in tcx.hir().items() {
             if matches!(tcx.def_kind(id.owner_id), DefKind::OpaqueTy) {
                 let type_of = tcx.type_of(id.owner_id).instantiate_identity();
 
-                res = Err(tcx.dcx().emit_err(TypeOf { span: tcx.def_span(id.owner_id), type_of }));
+                tcx.dcx().emit_err(TypeOf { span: tcx.def_span(id.owner_id), type_of });
             }
         }
     }
-    res
 }
 
 /// Checks "defining uses" of opaque `impl Trait` in associated types.

compiler/rustc_hir_analysis/src/lib.rs

@@ -98,7 +98,6 @@ mod outlives;
 pub mod structured_errors;
 mod variance;
 
-use rustc_errors::ErrorGuaranteed;
 use rustc_hir as hir;
 use rustc_middle::middle;
 use rustc_middle::query::Providers;
@@ -156,11 +155,13 @@ pub fn provide(providers: &mut Providers) {
     hir_wf_check::provide(providers);
 }
 
-pub fn check_crate(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
+pub fn check_crate(tcx: TyCtxt<'_>) {
     let _prof_timer = tcx.sess.timer("type_check_crate");
 
     if tcx.features().rustc_attrs {
-        tcx.sess.time("outlives_testing", || outlives::test::test_inferred_outlives(tcx))?;
+        tcx.sess.time("outlives_testing", || outlives::test::test_inferred_outlives(tcx));
+        tcx.sess.time("variance_testing", || variance::test::test_variance(tcx));
+        collect::test_opaque_hidden_types(tcx);
     }
 
     tcx.sess.time("coherence_checking", || {
@@ -176,14 +177,6 @@ pub fn check_crate(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
         let _ = tcx.ensure().crate_inherent_impls_overlap_check(());
     });
 
-    if tcx.features().rustc_attrs {
-        tcx.sess.time("variance_testing", || variance::test::test_variance(tcx))?;
-    }
-
-    if tcx.features().rustc_attrs {
-        collect::test_opaque_hidden_types(tcx)?;
-    }
-
     // Make sure we evaluate all static and (non-associated) const items, even if unused.
     // If any of these fail to evaluate, we do not want this crate to pass compilation.
     tcx.hir().par_body_owners(|item_def_id| {
@@ -198,21 +191,6 @@ pub fn check_crate(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
     // Freeze definitions as we don't add new ones at this point. This improves performance by
     // allowing lock-free access to them.
     tcx.untracked().definitions.freeze();
-
-    // FIXME: Remove this when we implement creating `DefId`s
-    // for anon constants during their parents' typeck.
-    // Typeck all body owners in parallel will produce queries
-    // cycle errors because it may typeck on anon constants directly.
-    tcx.hir().par_body_owners(|item_def_id| {
-        let def_kind = tcx.def_kind(item_def_id);
-        if !matches!(def_kind, DefKind::AnonConst) {
-            tcx.ensure().typeck(item_def_id);
-        }
-    });
-
-    tcx.ensure().check_unused_traits(());
-
-    Ok(())
 }
 
 /// A quasi-deprecated helper used in rustdoc and clippy to get

compiler/rustc_hir_analysis/src/outlives/test.rs

@@ -1,8 +1,7 @@
 use rustc_middle::ty::{self, TyCtxt};
-use rustc_span::{symbol::sym, ErrorGuaranteed};
+use rustc_span::symbol::sym;
 
-pub fn test_inferred_outlives(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
-    let mut res = Ok(());
+pub fn test_inferred_outlives(tcx: TyCtxt<'_>) {
     for id in tcx.hir().items() {
         // For unit testing: check for a special "rustc_outlives"
         // attribute and report an error with various results if found.
@@ -23,8 +22,7 @@ pub fn test_inferred_outlives(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
             for p in pred {
                 err.note(p);
             }
-            res = Err(err.emit());
+            err.emit();
         }
     }
-    res
 }

compiler/rustc_hir_analysis/src/variance/test.rs

@@ -2,21 +2,19 @@ use rustc_hir::def::DefKind;
 use rustc_hir::def_id::CRATE_DEF_ID;
 use rustc_middle::ty::TyCtxt;
 use rustc_span::symbol::sym;
-use rustc_span::ErrorGuaranteed;
 
 use crate::errors;
 
-pub fn test_variance(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
-    let mut res = Ok(());
+pub fn test_variance(tcx: TyCtxt<'_>) {
     if tcx.has_attr(CRATE_DEF_ID, sym::rustc_variance_of_opaques) {
         for id in tcx.hir().items() {
             if matches!(tcx.def_kind(id.owner_id), DefKind::OpaqueTy) {
                 let variances_of = tcx.variances_of(id.owner_id);
 
-                res = Err(tcx.dcx().emit_err(errors::VariancesOf {
+                tcx.dcx().emit_err(errors::VariancesOf {
                     span: tcx.def_span(id.owner_id),
                     variances_of: format!("{variances_of:?}"),
-                }));
+                });
             }
         }
     }
@@ -27,11 +25,10 @@ pub fn test_variance(tcx: TyCtxt<'_>) -> Result<(), ErrorGuaranteed> {
         if tcx.has_attr(id.owner_id, sym::rustc_variance) {
             let variances_of = tcx.variances_of(id.owner_id);
 
-            res = Err(tcx.dcx().emit_err(errors::VariancesOf {
+            tcx.dcx().emit_err(errors::VariancesOf {
                 span: tcx.def_span(id.owner_id),
                 variances_of: format!("{variances_of:?}"),
-            }));
+            });
         }
     }
-    res
 }