Auto merge of rust-lang#136386 - matthiaskrgr:rollup-afmv0x3, r=<try>

Rollup of 5 pull requests

Successful merges:

 - rust-lang#133266 (ci: fix explanation why LLVM download is disabled for windows-gnu)
 - rust-lang#135836 (bootstrap: only build `crt{begin,end}.o` when compiling to MUSL)
 - rust-lang#136279 (Rename `tcx.ensure()` to `tcx.ensure_ok()`, and improve the associated docs)
 - rust-lang#136328 (Rework "long type names" printing logic)
 - rust-lang#136358 (`#[optimize(none)]` implies `#[inline(never)]`)

r? `@ghost`
`@rustbot` modify labels: rollup

try-job: dist-powerpc64-linux

Author: bors

compiler/rustc_ast_lowering/src/lib.rs

@@ -418,10 +418,10 @@ fn compute_hir_hash(
 pub fn lower_to_hir(tcx: TyCtxt<'_>, (): ()) -> hir::Crate<'_> {
     let sess = tcx.sess;
     // Queries that borrow `resolver_for_lowering`.
-    tcx.ensure_with_value().output_filenames(());
-    tcx.ensure_with_value().early_lint_checks(());
-    tcx.ensure_with_value().debugger_visualizers(LOCAL_CRATE);
-    tcx.ensure_with_value().get_lang_items(());
+    tcx.ensure_done().output_filenames(());
+    tcx.ensure_done().early_lint_checks(());
+    tcx.ensure_done().debugger_visualizers(LOCAL_CRATE);
+    tcx.ensure_done().get_lang_items(());
     let (mut resolver, krate) = tcx.resolver_for_lowering().steal();
 
     let ast_index = index_crate(&resolver.node_id_to_def_id, &krate);

compiler/rustc_borrowck/messages.ftl

@@ -92,9 +92,6 @@ borrowck_lifetime_constraints_error =
 borrowck_limitations_implies_static =
     due to current limitations in the borrow checker, this implies a `'static` lifetime
 
-borrowck_long_type_consider_verbose = consider using `--verbose` to print the full type name to the console
-borrowck_long_type_full_path = the full type name has been written to '{$path}'
-
 borrowck_move_closure_suggestion =
     consider adding 'move' keyword before the nested closure
 

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -289,8 +289,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                 None => "value".to_owned(),
             };
             if needs_note {
-                let mut path = None;
-                let ty = self.infcx.tcx.short_ty_string(ty, &mut path);
+                let ty = self.infcx.tcx.short_string(ty, err.long_ty_path());
                 if let Some(local) = place.as_local() {
                     let span = self.body.local_decls[local].source_info.span;
                     err.subdiagnostic(crate::session_diagnostics::TypeNoCopy::Label {
@@ -306,11 +305,6 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                         place: &note_msg,
                     });
                 };
-                if let Some(path) = path {
-                    err.subdiagnostic(crate::session_diagnostics::LongTypePath {
-                        path: path.display().to_string(),
-                    });
-                }
             }
 
             if let UseSpans::FnSelfUse {

compiler/rustc_borrowck/src/diagnostics/move_errors.rs

@@ -596,19 +596,13 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                         self.suggest_cloning(err, place_ty, expr, None);
                     }
 
-                    let mut path = None;
-                    let ty = self.infcx.tcx.short_ty_string(place_ty, &mut path);
+                    let ty = self.infcx.tcx.short_string(place_ty, err.long_ty_path());
                     err.subdiagnostic(crate::session_diagnostics::TypeNoCopy::Label {
                         is_partial_move: false,
                         ty,
                         place: &place_desc,
                         span,
                     });
-                    if let Some(path) = path {
-                        err.subdiagnostic(crate::session_diagnostics::LongTypePath {
-                            path: path.display().to_string(),
-                        });
-                    }
                 } else {
                     binds_to.sort();
                     binds_to.dedup();
@@ -635,19 +629,13 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                     self.suggest_cloning(err, place_ty, expr, Some(use_spans));
                 }
 
-                let mut path = None;
-                let ty = self.infcx.tcx.short_ty_string(place_ty, &mut path);
+                let ty = self.infcx.tcx.short_string(place_ty, err.long_ty_path());
                 err.subdiagnostic(crate::session_diagnostics::TypeNoCopy::Label {
                     is_partial_move: false,
                     ty,
                     place: &place_desc,
                     span: use_span,
                 });
-                if let Some(path) = path {
-                    err.subdiagnostic(crate::session_diagnostics::LongTypePath {
-                        path: path.display().to_string(),
-                    });
-                }
 
                 use_spans.args_subdiag(err, |args_span| {
                     crate::session_diagnostics::CaptureArgLabel::MoveOutPlace {
@@ -845,19 +833,13 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
                     self.suggest_cloning(err, bind_to.ty, expr, None);
                 }
 
-                let mut path = None;
-                let ty = self.infcx.tcx.short_ty_string(bind_to.ty, &mut path);
+                let ty = self.infcx.tcx.short_string(bind_to.ty, err.long_ty_path());
                 err.subdiagnostic(crate::session_diagnostics::TypeNoCopy::Label {
                     is_partial_move: false,
                     ty,
                     place: place_desc,
                     span: binding_span,
                 });
-                if let Some(path) = path {
-                    err.subdiagnostic(crate::session_diagnostics::LongTypePath {
-                        path: path.display().to_string(),
-                    });
-                }
             }
         }
 

compiler/rustc_borrowck/src/session_diagnostics.rs

@@ -458,13 +458,6 @@ pub(crate) enum OnClosureNote<'a> {
     },
 }
 
-#[derive(Subdiagnostic)]
-#[note(borrowck_long_type_full_path)]
-#[note(borrowck_long_type_consider_verbose)]
-pub(crate) struct LongTypePath {
-    pub(crate) path: String,
-}
-
 #[derive(Subdiagnostic)]
 pub(crate) enum TypeNoCopy<'a> {
     #[label(borrowck_ty_no_impl_copy)]

compiler/rustc_codegen_cranelift/src/driver/aot.rs

@@ -692,7 +692,7 @@ pub(crate) fn run_aot(
 
     if tcx.dep_graph.is_fully_enabled() {
         for cgu in cgus {
-            tcx.ensure().codegen_unit(cgu.name());
+            tcx.ensure_ok().codegen_unit(cgu.name());
         }
     }
 

compiler/rustc_codegen_ssa/src/base.rs

@@ -634,7 +634,7 @@ pub fn codegen_crate<B: ExtraBackendMethods>(
     // unnecessarily.
     if tcx.dep_graph.is_fully_enabled() {
         for cgu in codegen_units {
-            tcx.ensure().codegen_unit(cgu.name());
+            tcx.ensure_ok().codegen_unit(cgu.name());
         }
     }
 

compiler/rustc_driver_impl/src/lib.rs

@@ -317,7 +317,7 @@ pub fn run_compiler(at_args: &[String], callbacks: &mut (dyn Callbacks + Send))
         if let Some(pp_mode) = sess.opts.pretty {
             if pp_mode.needs_ast_map() {
                 create_and_enter_global_ctxt(compiler, krate, |tcx| {
-                    tcx.ensure().early_lint_checks(());
+                    tcx.ensure_ok().early_lint_checks(());
                     pretty::print(sess, pp_mode, pretty::PrintExtra::NeedsAstMap { tcx });
                     passes::write_dep_info(tcx);
                 });
@@ -365,7 +365,7 @@ pub fn run_compiler(at_args: &[String], callbacks: &mut (dyn Callbacks + Send))
                 return early_exit();
             }
 
-            tcx.ensure().analysis(());
+            tcx.ensure_ok().analysis(());
 
             if callbacks.after_analysis(compiler, tcx) == Compilation::Stop {
                 return early_exit();

compiler/rustc_driver_impl/src/pretty.rs

@@ -222,7 +222,7 @@ impl<'tcx> PrintExtra<'tcx> {
 
 pub fn print<'tcx>(sess: &Session, ppm: PpMode, ex: PrintExtra<'tcx>) {
     if ppm.needs_analysis() {
-        ex.tcx().ensure().analysis(());
+        ex.tcx().ensure_ok().analysis(());
     }
 
     let (src, src_name) = get_source(sess);

compiler/rustc_errors/src/diagnostic.rs

@@ -4,6 +4,7 @@ use std::hash::{Hash, Hasher};
 use std::marker::PhantomData;
 use std::ops::{Deref, DerefMut};
 use std::panic;
+use std::path::PathBuf;
 use std::thread::panicking;
 
 use rustc_data_structures::fx::FxIndexMap;
@@ -301,6 +302,7 @@ pub struct DiagInner {
 
     pub is_lint: Option<IsLint>,
 
+    pub long_ty_path: Option<PathBuf>,
     /// With `-Ztrack_diagnostics` enabled,
     /// we print where in rustc this error was emitted.
     pub(crate) emitted_at: DiagLocation,
@@ -324,6 +326,7 @@ impl DiagInner {
             args: Default::default(),
             sort_span: DUMMY_SP,
             is_lint: None,
+            long_ty_path: None,
             emitted_at: DiagLocation::caller(),
         }
     }
@@ -1293,9 +1296,37 @@ impl<'a, G: EmissionGuarantee> Diag<'a, G> {
     /// `cancel`, etc. Afterwards, `drop` is the only code that will be run on
     /// `self`.
     fn take_diag(&mut self) -> DiagInner {
+        if let Some(path) = &self.long_ty_path {
+            self.note(format!(
+                "the full name for the type has been written to '{}'",
+                path.display()
+            ));
+            self.note("consider using `--verbose` to print the full type name to the console");
+        }
         Box::into_inner(self.diag.take().unwrap())
     }
 
+    /// This method allows us to access the path of the file where "long types" are written to.
+    ///
+    /// When calling `Diag::emit`, as part of that we will check if a `long_ty_path` has been set,
+    /// and if it has been then we add a note mentioning the file where the "long types" were
+    /// written to.
+    ///
+    /// When calling `tcx.short_string()` after a `Diag` is constructed, the preferred way of doing
+    /// so is `tcx.short_string(ty, diag.long_ty_path())`. The diagnostic itself is the one that
+    /// keeps the existence of a "long type" anywhere in the diagnostic, so the note telling the
+    /// user where we wrote the file to is only printed once at most, *and* it makes it much harder
+    /// to forget to set it.
+    ///
+    /// If the diagnostic hasn't been created before a "short ty string" is created, then you should
+    /// ensure that this method is called to set it `*diag.long_ty_path() = path`.
+    ///
+    /// As a rule of thumb, if you see or add at least one `tcx.short_string()` call anywhere, in a
+    /// scope, `diag.long_ty_path()` should be called once somewhere close by.
+    pub fn long_ty_path(&mut self) -> &mut Option<PathBuf> {
+        &mut self.long_ty_path
+    }
+
     /// Most `emit_producing_guarantee` functions use this as a starting point.
     fn emit_producing_nothing(mut self) {
         let diag = self.take_diag();