Rollup of 9 pull requests

compiler/rustc_codegen_ssa/src/back/symbol_export.rs

@@ -400,7 +400,7 @@ fn upstream_monomorphizations_provider(
     tcx: TyCtxt<'_>,
     (): (),
 ) -> DefIdMap<UnordMap<GenericArgsRef<'_>, CrateNum>> {
-    let cnums = tcx.used_crates(());
+    let cnums = tcx.crates(());
 
     let mut instances: DefIdMap<UnordMap<_, _>> = Default::default();
 

compiler/rustc_codegen_ssa/src/base.rs

@@ -541,7 +541,7 @@ pub fn collect_debugger_visualizers_transitive(
     tcx.debugger_visualizers(LOCAL_CRATE)
         .iter()
         .chain(
-            tcx.used_crates(())
+            tcx.crates(())
                 .iter()
                 .filter(|&cnum| {
                     let used_crate_source = tcx.used_crate_source(*cnum);
@@ -851,7 +851,7 @@ impl CrateInfo {
         // `compiler_builtins` are always placed last to ensure that they're linked correctly.
         used_crates.extend(compiler_builtins);
 
-        let crates = tcx.used_crates(());
+        let crates = tcx.crates(());
         let n_crates = crates.len();
         let mut info = CrateInfo {
             target_cpu,

compiler/rustc_interface/src/passes.rs

@@ -464,7 +464,7 @@ fn write_out_deps(tcx: TyCtxt<'_>, outputs: &OutputFilenames, out_filenames: &[P
                 }
             }
 
-            for &cnum in tcx.crates_including_speculative(()) {
+            for &cnum in tcx.crates(()) {
                 let source = tcx.used_crate_source(cnum);
                 if let Some((path, _)) = &source.dylib {
                     files.push(escape_dep_filename(&path.display().to_string()));

compiler/rustc_macros/src/query.rs

@@ -314,6 +314,17 @@ pub fn rustc_queries(input: TokenStream) -> TokenStream {
     let mut query_description_stream = quote! {};
     let mut query_cached_stream = quote! {};
     let mut feedable_queries = quote! {};
+    let mut errors = quote! {};
+
+    macro_rules! assert {
+        ( $cond:expr, $span:expr, $( $tt:tt )+ ) => {
+            if !$cond {
+                errors.extend(
+                    Error::new($span, format!($($tt)+)).into_compile_error(),
+                );
+            }
+        }
+    }
 
     for query in queries.0 {
         let Query { name, arg, modifiers, .. } = &query;
@@ -369,10 +380,15 @@ pub fn rustc_queries(input: TokenStream) -> TokenStream {
             [#attribute_stream] fn #name(#arg) #result,
         });
 
-        if modifiers.feedable.is_some() {
-            assert!(modifiers.anon.is_none(), "Query {name} cannot be both `feedable` and `anon`.");
+        if let Some(feedable) = &modifiers.feedable {
+            assert!(
+                modifiers.anon.is_none(),
+                feedable.span(),
+                "Query {name} cannot be both `feedable` and `anon`."
+            );
             assert!(
                 modifiers.eval_always.is_none(),
+                feedable.span(),
                 "Query {name} cannot be both `feedable` and `eval_always`."
             );
             feedable_queries.extend(quote! {
@@ -407,5 +423,6 @@ pub fn rustc_queries(input: TokenStream) -> TokenStream {
             use super::*;
             #query_cached_stream
         }
+        #errors
     })
 }

compiler/rustc_metadata/src/dependency_format.rs

@@ -144,7 +144,7 @@ fn calculate_type(tcx: TyCtxt<'_>, ty: CrateType) -> DependencyList {
                     && sess.crt_static(Some(ty))
                     && !sess.target.crt_static_allows_dylibs)
             {
-                for &cnum in tcx.used_crates(()).iter() {
+                for &cnum in tcx.crates(()).iter() {
                     if tcx.dep_kind(cnum).macros_only() {
                         continue;
                     }
@@ -165,7 +165,7 @@ fn calculate_type(tcx: TyCtxt<'_>, ty: CrateType) -> DependencyList {
     // Sweep all crates for found dylibs. Add all dylibs, as well as their
     // dependencies, ensuring there are no conflicts. The only valid case for a
     // dependency to be relied upon twice is for both cases to rely on a dylib.
-    for &cnum in tcx.used_crates(()).iter() {
+    for &cnum in tcx.crates(()).iter() {
         if tcx.dep_kind(cnum).macros_only() {
             continue;
         }
@@ -183,7 +183,7 @@ fn calculate_type(tcx: TyCtxt<'_>, ty: CrateType) -> DependencyList {
     }
 
     // Collect what we've got so far in the return vector.
-    let last_crate = tcx.used_crates(()).len();
+    let last_crate = tcx.crates(()).len();
     let mut ret = (1..last_crate + 1)
         .map(|cnum| match formats.get(&CrateNum::new(cnum)) {
             Some(&RequireDynamic) => Linkage::Dynamic,
@@ -197,7 +197,7 @@ fn calculate_type(tcx: TyCtxt<'_>, ty: CrateType) -> DependencyList {
     //
     // If the crate hasn't been included yet and it's not actually required
     // (e.g., it's an allocator) then we skip it here as well.
-    for &cnum in tcx.used_crates(()).iter() {
+    for &cnum in tcx.crates(()).iter() {
         let src = tcx.used_crate_source(cnum);
         if src.dylib.is_none()
             && !formats.contains_key(&cnum)
@@ -285,7 +285,7 @@ fn add_library(
 
 fn attempt_static(tcx: TyCtxt<'_>, unavailable: &mut Vec<CrateNum>) -> Option<DependencyList> {
     let all_crates_available_as_rlib = tcx
-        .used_crates(())
+        .crates(())
         .iter()
         .copied()
         .filter_map(|cnum| {
@@ -306,7 +306,7 @@ fn attempt_static(tcx: TyCtxt<'_>, unavailable: &mut Vec<CrateNum>) -> Option<De
     // All crates are available in an rlib format, so we're just going to link
     // everything in explicitly so long as it's actually required.
     let mut ret = tcx
-        .used_crates(())
+        .crates(())
         .iter()
         .map(|&cnum| match tcx.dep_kind(cnum) {
             CrateDepKind::Explicit => Linkage::Static,

compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs

@@ -439,7 +439,7 @@ pub(in crate::rmeta) fn provide(providers: &mut Providers) {
             // traversal, but not globally minimal across all crates.
             let bfs_queue = &mut VecDeque::new();
 
-            for &cnum in tcx.crates_including_speculative(()) {
+            for &cnum in tcx.crates(()) {
                 // Ignore crates without a corresponding local `extern crate` item.
                 if tcx.missing_extern_crate_item(cnum) {
                     continue;
@@ -509,7 +509,7 @@ pub(in crate::rmeta) fn provide(providers: &mut Providers) {
             tcx.arena
                 .alloc_slice(&CStore::from_tcx(tcx).crate_dependencies_in_postorder(LOCAL_CRATE))
         },
-        crates_including_speculative: |tcx, ()| {
+        crates: |tcx, ()| {
             // The list of loaded crates is now frozen in query cache,
             // so make sure cstore is not mutably accessed from here on.
             tcx.untracked().cstore.freeze();

compiler/rustc_metadata/src/rmeta/encoder.rs

@@ -1899,7 +1899,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
 
         let deps = self
             .tcx
-            .crates_including_speculative(())
+            .crates(())
             .iter()
             .map(|&cnum| {
                 let dep = CrateDep {

compiler/rustc_middle/src/hir/map/mod.rs

@@ -1042,7 +1042,7 @@ pub(super) fn crate_hash(tcx: TyCtxt<'_>, _: LocalCrate) -> Svh {
     let krate = tcx.hir_crate(());
     let hir_body_hash = krate.opt_hir_hash.expect("HIR hash missing while computing crate hash");
 
-    let upstream_crates = upstream_crates_for_hashing(tcx);
+    let upstream_crates = upstream_crates(tcx);
 
     let resolutions = tcx.resolutions(());
 
@@ -1111,9 +1111,9 @@ pub(super) fn crate_hash(tcx: TyCtxt<'_>, _: LocalCrate) -> Svh {
     Svh::new(crate_hash)
 }
 
-fn upstream_crates_for_hashing(tcx: TyCtxt<'_>) -> Vec<(StableCrateId, Svh)> {
+fn upstream_crates(tcx: TyCtxt<'_>) -> Vec<(StableCrateId, Svh)> {
     let mut upstream_crates: Vec<_> = tcx
-        .crates_including_speculative(())
+        .crates(())
         .iter()
         .map(|&cnum| {
             let stable_crate_id = tcx.stable_crate_id(cnum);

compiler/rustc_middle/src/query/mod.rs

@@ -1861,22 +1861,13 @@ rustc_queries! {
         eval_always
         desc { "calculating the stability index for the local crate" }
     }
-    /// All loaded crates, including those loaded purely for doc links or diagnostics.
-    /// (Diagnostics include lints, so speculatively loaded crates may occur in successful
-    /// compilation even without doc links.)
-    /// Should be used when encoding crate metadata (and therefore when generating crate hash,
-    /// depinfo and similar things), to avoid dangling crate references in other encoded data,
-    /// like source maps.
-    /// May also be used for diagnostics - if we are loading a crate anyway we can suggest some
-    /// items from it as well.
-    /// But otherwise, `used_crates` should generally be used.
-    query crates_including_speculative(_: ()) -> &'tcx [CrateNum] {
+    query crates(_: ()) -> &'tcx [CrateNum] {
         eval_always
         desc { "fetching all foreign CrateNum instances" }
     }
-    /// Crates that are loaded non-speculatively (not for diagnostics or doc links).
-    /// Should be used to maintain observable language behavior, for example when collecting lang
-    /// items or impls from all crates, or collecting libraries to link.
+    // Crates that are loaded non-speculatively (not for diagnostics or doc links).
+    // FIXME: This is currently only used for collecting lang items, but should be used instead of
+    // `crates` in most other cases too.
     query used_crates(_: ()) -> &'tcx [CrateNum] {
         eval_always
         desc { "fetching `CrateNum`s for all crates loaded non-speculatively" }

compiler/rustc_middle/src/ty/context.rs

@@ -1616,7 +1616,7 @@ impl<'tcx> TyCtxt<'tcx> {
 
     pub fn all_traits(self) -> impl Iterator<Item = DefId> + 'tcx {
         iter::once(LOCAL_CRATE)
-            .chain(self.used_crates(()).iter().copied())
+            .chain(self.crates(()).iter().copied())
             .flat_map(move |cnum| self.traits(cnum).iter().copied())
     }
 

compiler/rustc_middle/src/ty/print/pretty.rs

@@ -3232,7 +3232,7 @@ fn for_each_def(tcx: TyCtxt<'_>, mut collect_fn: impl for<'b> FnMut(&'b Ident, N
     let queue = &mut Vec::new();
     let mut seen_defs: DefIdSet = Default::default();
 
-    for &cnum in tcx.crates_including_speculative(()).iter() {
+    for &cnum in tcx.crates(()).iter() {
         let def_id = cnum.as_def_id();
 
         // Ignore crates that are not direct dependencies.

compiler/rustc_middle/src/ty/trait_def.rs

@@ -206,7 +206,7 @@ pub(super) fn trait_impls_of_provider(tcx: TyCtxt<'_>, trait_id: DefId) -> Trait
     // Traits defined in the current crate can't have impls in upstream
     // crates, so we don't bother querying the cstore.
     if !trait_id.is_local() {
-        for &cnum in tcx.used_crates(()).iter() {
+        for &cnum in tcx.crates(()).iter() {
             for &(impl_def_id, simplified_self_ty) in
                 tcx.implementations_of_trait((cnum, trait_id)).iter()
             {
@@ -248,7 +248,7 @@ pub(super) fn incoherent_impls_provider(
     let mut impls = Vec::new();
 
     let mut res = Ok(());
-    for cnum in iter::once(LOCAL_CRATE).chain(tcx.used_crates(()).iter().copied()) {
+    for cnum in iter::once(LOCAL_CRATE).chain(tcx.crates(()).iter().copied()) {
         let incoherent_impls = match tcx.crate_incoherent_impls((cnum, simp)) {
             Ok(impls) => impls,
             Err(e) => {

compiler/rustc_passes/src/diagnostic_items.rs

@@ -82,7 +82,7 @@ fn all_diagnostic_items(tcx: TyCtxt<'_>, (): ()) -> DiagnosticItems {
     let mut items = DiagnosticItems::default();
 
     // Collect diagnostic items in other crates.
-    for &cnum in tcx.crates_including_speculative(()).iter().chain(std::iter::once(&LOCAL_CRATE)) {
+    for &cnum in tcx.crates(()).iter().chain(std::iter::once(&LOCAL_CRATE)) {
         for (&name, &def_id) in &tcx.diagnostic_items(cnum).name_to_id {
             collect_item(tcx, &mut items, name, def_id);
         }

compiler/rustc_passes/src/stability.rs

@@ -1020,7 +1020,7 @@ pub fn check_unused_or_stable_features(tcx: TyCtxt<'_>) {
         // stabilization diagnostic, but it can be avoided when there are no
         // `remaining_lib_features`.
         let mut all_implications = remaining_implications.clone();
-        for &cnum in tcx.used_crates(()) {
+        for &cnum in tcx.crates(()) {
             all_implications
                 .extend_unord(tcx.stability_implications(cnum).items().map(|(k, v)| (*k, *v)));
         }
@@ -1033,7 +1033,7 @@ pub fn check_unused_or_stable_features(tcx: TyCtxt<'_>) {
             &all_implications,
         );
 
-        for &cnum in tcx.used_crates(()) {
+        for &cnum in tcx.crates(()) {
             if remaining_lib_features.is_empty() && remaining_implications.is_empty() {
                 break;
             }

compiler/rustc_passes/src/weak_lang_items.rs

@@ -68,7 +68,7 @@ fn verify(tcx: TyCtxt<'_>, items: &lang_items::LanguageItems) {
     }
 
     let mut missing = FxHashSet::default();
-    for &cnum in tcx.used_crates(()).iter() {
+    for &cnum in tcx.crates(()).iter() {
         for &item in tcx.missing_lang_items(cnum).iter() {
             missing.insert(item);
         }

compiler/rustc_query_system/src/dep_graph/graph.rs

@@ -64,7 +64,6 @@ pub struct MarkFrame<'a> {
     parent: Option<&'a MarkFrame<'a>>,
 }
 
-#[derive(PartialEq)]
 enum DepNodeColor {
     Red,
     Green(DepNodeIndex),
@@ -925,7 +924,7 @@ impl<D: Deps> DepGraph<D> {
     /// Returns true if the given node has been marked as red during the
     /// current compilation session. Used in various assertions
     pub fn is_red(&self, dep_node: &DepNode) -> bool {
-        self.node_color(dep_node) == Some(DepNodeColor::Red)
+        matches!(self.node_color(dep_node), Some(DepNodeColor::Red))
     }
 
     /// Returns true if the given node has been marked as green during the

compiler/rustc_smir/src/rustc_smir/context.rs

@@ -126,7 +126,7 @@ impl<'tcx> Context for TablesWrapper<'tcx> {
         let mut tables = self.0.borrow_mut();
         let tcx = tables.tcx;
         iter::once(LOCAL_CRATE)
-            .chain(tables.tcx.used_crates(()).iter().copied())
+            .chain(tables.tcx.crates(()).iter().copied())
             .flat_map(|cnum| tcx.trait_impls_in_crate(cnum).iter())
             .map(|impl_def_id| tables.impl_def(*impl_def_id))
             .collect()
@@ -201,19 +201,14 @@ impl<'tcx> Context for TablesWrapper<'tcx> {
 
     fn external_crates(&self) -> Vec<stable_mir::Crate> {
         let tables = self.0.borrow();
-        tables
-            .tcx
-            .used_crates(())
-            .iter()
-            .map(|crate_num| smir_crate(tables.tcx, *crate_num))
-            .collect()
+        tables.tcx.crates(()).iter().map(|crate_num| smir_crate(tables.tcx, *crate_num)).collect()
     }
 
     fn find_crates(&self, name: &str) -> Vec<stable_mir::Crate> {
         let tables = self.0.borrow();
         let crates: Vec<stable_mir::Crate> = [LOCAL_CRATE]
             .iter()
-            .chain(tables.tcx.used_crates(()).iter())
+            .chain(tables.tcx.crates(()).iter())
             .filter_map(|crate_num| {
                 let crate_name = tables.tcx.crate_name(*crate_num).to_string();
                 (name == crate_name).then(|| smir_crate(tables.tcx, *crate_num))

library/core/src/fmt/num.rs

@@ -212,6 +212,7 @@ static DEC_DIGITS_LUT: &[u8; 200] = b"0001020304050607080910111213141516171819\
 
 macro_rules! impl_Display {
     ($($t:ident),* as $u:ident via $conv_fn:ident named $name:ident) => {
+        #[cfg(not(feature = "optimize_for_size"))]
         fn $name(mut n: $u, is_nonnegative: bool, f: &mut fmt::Formatter<'_>) -> fmt::Result {
             // 2^128 is about 3*10^38, so 39 gives an extra byte of space
             let mut buf = [MaybeUninit::<u8>::uninit(); 39];
@@ -277,6 +278,38 @@ macro_rules! impl_Display {
             f.pad_integral(is_nonnegative, "", buf_slice)
         }
 
+        #[cfg(feature = "optimize_for_size")]
+        fn $name(mut n: $u, is_nonnegative: bool, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+            // 2^128 is about 3*10^38, so 39 gives an extra byte of space
+            let mut buf = [MaybeUninit::<u8>::uninit(); 39];
+            let mut curr = buf.len();
+            let buf_ptr = MaybeUninit::slice_as_mut_ptr(&mut buf);
+
+            // SAFETY: To show that it's OK to copy into `buf_ptr`, notice that at the beginning
+            // `curr == buf.len() == 39 > log(n)` since `n < 2^128 < 10^39`, and at
+            // each step this is kept the same as `n` is divided. Since `n` is always
+            // non-negative, this means that `curr > 0` so `buf_ptr[curr..curr + 1]`
+            // is safe to access.
+            unsafe {
+                loop {
+                    curr -= 1;
+                    buf_ptr.add(curr).write((n % 10) as u8 + b'0');
+                    n /= 10;
+
+                    if n == 0 {
+                        break;
+                    }
+                }
+            }
+
+            // SAFETY: `curr` > 0 (since we made `buf` large enough), and all the chars are valid UTF-8
+            let buf_slice = unsafe {
+                str::from_utf8_unchecked(
+                    slice::from_raw_parts(buf_ptr.add(curr), buf.len() - curr))
+            };
+            f.pad_integral(is_nonnegative, "", buf_slice)
+        }
+
         $(#[stable(feature = "rust1", since = "1.0.0")]
         impl fmt::Display for $t {
             #[allow(unused_comparisons)]

library/std/src/sys/pal/uefi/thread.rs

@@ -7,7 +7,7 @@ use crate::time::Duration;
 
 pub struct Thread(!);
 
-pub const DEFAULT_MIN_STACK_SIZE: usize = 4096;
+pub const DEFAULT_MIN_STACK_SIZE: usize = 64 * 1024;
 
 impl Thread {
     // unsafe: see thread::Builder::spawn_unchecked for safety requirements

library/std/src/sys/pal/unsupported/thread.rs

@@ -6,7 +6,7 @@ use crate::time::Duration;
 
 pub struct Thread(!);
 
-pub const DEFAULT_MIN_STACK_SIZE: usize = 4096;
+pub const DEFAULT_MIN_STACK_SIZE: usize = 64 * 1024;
 
 impl Thread {
     // unsafe: see thread::Builder::spawn_unchecked for safety requirements