Rollup of 7 pull requests

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -20,7 +20,7 @@ use rustc_session::utils::NativeLibKind;
 use rustc_session::{filesearch, Session};
 use rustc_span::symbol::Symbol;
 use rustc_span::DebuggerVisualizerFile;
-use rustc_target::spec::crt_objects::{CrtObjects, CrtObjectsFallback};
+use rustc_target::spec::crt_objects::{CrtObjects, LinkSelfContainedDefault};
 use rustc_target::spec::{LinkOutputKind, LinkerFlavor, LldFlavor, SplitDebuginfo};
 use rustc_target::spec::{PanicStrategy, RelocModel, RelroLevel, SanitizerSet, Target};
 
@@ -764,15 +764,15 @@ fn link_natively<'a>(
                 "Linker does not support -static-pie command line option. Retrying with -static instead."
             );
             // Mirror `add_(pre,post)_link_objects` to replace CRT objects.
-            let self_contained = crt_objects_fallback(sess, crate_type);
+            let self_contained = self_contained(sess, crate_type);
             let opts = &sess.target;
             let pre_objects = if self_contained {
-                &opts.pre_link_objects_fallback
+                &opts.pre_link_objects_self_contained
             } else {
                 &opts.pre_link_objects
             };
             let post_objects = if self_contained {
-                &opts.post_link_objects_fallback
+                &opts.post_link_objects_self_contained
             } else {
                 &opts.post_link_objects
             };
@@ -1556,26 +1556,26 @@ fn detect_self_contained_mingw(sess: &Session) -> bool {
     true
 }
 
-/// Whether we link to our own CRT objects instead of relying on gcc to pull them.
+/// Various toolchain components used during linking are used from rustc distribution
+/// instead of being found somewhere on the host system.
 /// We only provide such support for a very limited number of targets.
-fn crt_objects_fallback(sess: &Session, crate_type: CrateType) -> bool {
+fn self_contained(sess: &Session, crate_type: CrateType) -> bool {
     if let Some(self_contained) = sess.opts.cg.link_self_contained {
         return self_contained;
     }
 
-    match sess.target.crt_objects_fallback {
+    match sess.target.link_self_contained {
+        LinkSelfContainedDefault::False => false,
+        LinkSelfContainedDefault::True => true,
         // FIXME: Find a better heuristic for "native musl toolchain is available",
         // based on host and linker path, for example.
         // (https://github.com/rust-lang/rust/pull/71769#issuecomment-626330237).
-        Some(CrtObjectsFallback::Musl) => sess.crt_static(Some(crate_type)),
-        Some(CrtObjectsFallback::Mingw) => {
+        LinkSelfContainedDefault::Musl => sess.crt_static(Some(crate_type)),
+        LinkSelfContainedDefault::Mingw => {
             sess.host == sess.target
                 && sess.target.vendor != "uwp"
                 && detect_self_contained_mingw(&sess)
         }
-        // FIXME: Figure out cases in which WASM needs to link with a native toolchain.
-        Some(CrtObjectsFallback::Wasm) => true,
-        None => false,
     }
 }
 
@@ -1592,7 +1592,7 @@ fn add_pre_link_objects(
     let opts = &sess.target;
     let empty = Default::default();
     let objects = if self_contained {
-        &opts.pre_link_objects_fallback
+        &opts.pre_link_objects_self_contained
     } else if !(sess.target.os == "fuchsia" && flavor == LinkerFlavor::Gcc) {
         &opts.pre_link_objects
     } else {
@@ -1610,9 +1610,11 @@ fn add_post_link_objects(
     link_output_kind: LinkOutputKind,
     self_contained: bool,
 ) {
-    let opts = &sess.target;
-    let objects =
-        if self_contained { &opts.post_link_objects_fallback } else { &opts.post_link_objects };
+    let objects = if self_contained {
+        &sess.target.post_link_objects_self_contained
+    } else {
+        &sess.target.post_link_objects
+    };
     for obj in objects.get(&link_output_kind).iter().copied().flatten() {
         cmd.add_object(&get_object_file_path(sess, obj, self_contained));
     }
@@ -1891,12 +1893,12 @@ fn linker_with_args<'a>(
     out_filename: &Path,
     codegen_results: &CodegenResults,
 ) -> Result<Command, ErrorGuaranteed> {
-    let crt_objects_fallback = crt_objects_fallback(sess, crate_type);
+    let self_contained = self_contained(sess, crate_type);
     let cmd = &mut *super::linker::get_linker(
         sess,
         path,
         flavor,
-        crt_objects_fallback,
+        self_contained,
         &codegen_results.crate_info.target_cpu,
     );
     let link_output_kind = link_output_kind(sess, crate_type);
@@ -1923,7 +1925,7 @@ fn linker_with_args<'a>(
     // ------------ Object code and libraries, order-dependent ------------
 
     // Pre-link CRT objects.
-    add_pre_link_objects(cmd, sess, flavor, link_output_kind, crt_objects_fallback);
+    add_pre_link_objects(cmd, sess, flavor, link_output_kind, self_contained);
 
     add_linked_symbol_object(
         cmd,
@@ -2033,7 +2035,7 @@ fn linker_with_args<'a>(
         cmd,
         sess,
         link_output_kind,
-        crt_objects_fallback,
+        self_contained,
         flavor,
         crate_type,
         codegen_results,
@@ -2049,7 +2051,7 @@ fn linker_with_args<'a>(
     // ------------ Object code and libraries, order-dependent ------------
 
     // Post-link CRT objects.
-    add_post_link_objects(cmd, sess, link_output_kind, crt_objects_fallback);
+    add_post_link_objects(cmd, sess, link_output_kind, self_contained);
 
     // ------------ Late order-dependent options ------------
 
@@ -2066,7 +2068,7 @@ fn add_order_independent_options(
     cmd: &mut dyn Linker,
     sess: &Session,
     link_output_kind: LinkOutputKind,
-    crt_objects_fallback: bool,
+    self_contained: bool,
     flavor: LinkerFlavor,
     crate_type: CrateType,
     codegen_results: &CodegenResults,
@@ -2098,7 +2100,7 @@ fn add_order_independent_options(
     // Make the binary compatible with data execution prevention schemes.
     cmd.add_no_exec();
 
-    if crt_objects_fallback {
+    if self_contained {
         cmd.no_crt_objects();
     }
 
@@ -2127,7 +2129,7 @@ fn add_order_independent_options(
 
     cmd.linker_plugin_lto();
 
-    add_library_search_dirs(cmd, sess, crt_objects_fallback);
+    add_library_search_dirs(cmd, sess, self_contained);
 
     cmd.output_filename(out_filename);
 

compiler/rustc_hir_pretty/src/lib.rs

@@ -911,6 +911,10 @@ impl<'a> State<'a> {
         if let Some(els) = els {
             self.nbsp();
             self.word_space("else");
+            // containing cbox, will be closed by print-block at `}`
+            self.cbox(0);
+            // head-box, will be closed by print-block after `{`
+            self.ibox(0);
             self.print_block(els);
         }
 

compiler/rustc_parse/src/parser/expr.rs

@@ -2268,7 +2268,7 @@ impl<'a> Parser<'a> {
                     attrs: attrs.into(),
                     ty,
                     pat,
-                    span: lo.to(this.token.span),
+                    span: lo.to(this.prev_token.span),
                     id: DUMMY_NODE_ID,
                     is_placeholder: false,
                 },

compiler/rustc_resolve/src/late/diagnostics.rs

@@ -985,27 +985,45 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
         let ns = source.namespace();
         let is_expected = &|res| source.is_expected(res);
 
-        let path_sep = |err: &mut Diagnostic, expr: &Expr| match expr.kind {
-            ExprKind::Field(_, ident) => {
+        let path_sep = |err: &mut Diagnostic, expr: &Expr, kind: DefKind| {
+            const MESSAGE: &str = "use the path separator to refer to an item";
+
+            let (lhs_span, rhs_span) = match &expr.kind {
+                ExprKind::Field(base, ident) => (base.span, ident.span),
+                ExprKind::MethodCall(_, receiver, _, span) => (receiver.span, *span),
+                _ => return false,
+            };
+
+            if lhs_span.eq_ctxt(rhs_span) {
                 err.span_suggestion(
-                    expr.span,
-                    "use the path separator to refer to an item",
-                    format!("{}::{}", path_str, ident),
+                    lhs_span.between(rhs_span),
+                    MESSAGE,
+                    "::",
                     Applicability::MaybeIncorrect,
                 );
                 true
-            }
-            ExprKind::MethodCall(ref segment, ..) => {
-                let span = expr.span.with_hi(segment.ident.span.hi());
-                err.span_suggestion(
-                    span,
-                    "use the path separator to refer to an item",
-                    format!("{}::{}", path_str, segment.ident),
+            } else if kind == DefKind::Struct
+            && let Some(lhs_source_span) = lhs_span.find_ancestor_inside(expr.span)
+            && let Ok(snippet) = self.r.session.source_map().span_to_snippet(lhs_source_span)
+            {
+                // The LHS is a type that originates from a macro call.
+                // We have to add angle brackets around it.
+
+                err.span_suggestion_verbose(
+                    lhs_source_span.until(rhs_span),
+                    MESSAGE,
+                    format!("<{snippet}>::"),
                     Applicability::MaybeIncorrect,
                 );
                 true
+            } else {
+                // Either we were unable to obtain the source span / the snippet or
+                // the LHS originates from a macro call and it is not a type and thus
+                // there is no way to replace `.` with `::` and still somehow suggest
+                // valid Rust code.
+
+                false
             }
-            _ => false,
         };
 
         let find_span = |source: &PathSource<'_>, err: &mut Diagnostic| {
@@ -1027,7 +1045,7 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
             match source {
                 PathSource::Expr(Some(
                     parent @ Expr { kind: ExprKind::Field(..) | ExprKind::MethodCall(..), .. },
-                )) if path_sep(err, &parent) => {}
+                )) if path_sep(err, &parent, DefKind::Struct) => {}
                 PathSource::Expr(
                     None
                     | Some(Expr {
@@ -1143,8 +1161,11 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
                     }
                 }
             }
-            (Res::Def(DefKind::Mod, _), PathSource::Expr(Some(parent))) => {
-                if !path_sep(err, &parent) {
+            (
+                Res::Def(kind @ (DefKind::Mod | DefKind::Trait), _),
+                PathSource::Expr(Some(parent)),
+            ) => {
+                if !path_sep(err, &parent, kind) {
                     return false;
                 }
             }

compiler/rustc_target/src/spec/crt_objects.rs

@@ -63,7 +63,7 @@ pub(super) fn all(obj: &'static str) -> CrtObjects {
     ])
 }
 
-pub(super) fn pre_musl_fallback() -> CrtObjects {
+pub(super) fn pre_musl_self_contained() -> CrtObjects {
     new(&[
         (LinkOutputKind::DynamicNoPicExe, &["crt1.o", "crti.o", "crtbegin.o"]),
         (LinkOutputKind::DynamicPicExe, &["Scrt1.o", "crti.o", "crtbeginS.o"]),
@@ -74,7 +74,7 @@ pub(super) fn pre_musl_fallback() -> CrtObjects {
     ])
 }
 
-pub(super) fn post_musl_fallback() -> CrtObjects {
+pub(super) fn post_musl_self_contained() -> CrtObjects {
     new(&[
         (LinkOutputKind::DynamicNoPicExe, &["crtend.o", "crtn.o"]),
         (LinkOutputKind::DynamicPicExe, &["crtendS.o", "crtn.o"]),
@@ -85,7 +85,7 @@ pub(super) fn post_musl_fallback() -> CrtObjects {
     ])
 }
 
-pub(super) fn pre_mingw_fallback() -> CrtObjects {
+pub(super) fn pre_mingw_self_contained() -> CrtObjects {
     new(&[
         (LinkOutputKind::DynamicNoPicExe, &["crt2.o", "rsbegin.o"]),
         (LinkOutputKind::DynamicPicExe, &["crt2.o", "rsbegin.o"]),
@@ -96,7 +96,7 @@ pub(super) fn pre_mingw_fallback() -> CrtObjects {
     ])
 }
 
-pub(super) fn post_mingw_fallback() -> CrtObjects {
+pub(super) fn post_mingw_self_contained() -> CrtObjects {
     all("rsend.o")
 }
 
@@ -108,7 +108,7 @@ pub(super) fn post_mingw() -> CrtObjects {
     all("rsend.o")
 }
 
-pub(super) fn pre_wasi_fallback() -> CrtObjects {
+pub(super) fn pre_wasi_self_contained() -> CrtObjects {
     // Use crt1-command.o instead of crt1.o to enable support for new-style
     // commands. See https://reviews.llvm.org/D81689 for more info.
     new(&[
@@ -120,37 +120,41 @@ pub(super) fn pre_wasi_fallback() -> CrtObjects {
     ])
 }
 
-pub(super) fn post_wasi_fallback() -> CrtObjects {
+pub(super) fn post_wasi_self_contained() -> CrtObjects {
     new(&[])
 }
 
-/// Which logic to use to determine whether to fall back to the "self-contained" mode or not.
+/// Which logic to use to determine whether to use self-contained linking mode
+/// if `-Clink-self-contained` is not specified explicitly.
 #[derive(Clone, Copy, PartialEq, Hash, Debug)]
-pub enum CrtObjectsFallback {
+pub enum LinkSelfContainedDefault {
+    False,
+    True,
     Musl,
     Mingw,
-    Wasm,
 }
 
-impl FromStr for CrtObjectsFallback {
+impl FromStr for LinkSelfContainedDefault {
     type Err = ();
 
-    fn from_str(s: &str) -> Result<CrtObjectsFallback, ()> {
+    fn from_str(s: &str) -> Result<LinkSelfContainedDefault, ()> {
         Ok(match s {
-            "musl" => CrtObjectsFallback::Musl,
-            "mingw" => CrtObjectsFallback::Mingw,
-            "wasm" => CrtObjectsFallback::Wasm,
+            "false" => LinkSelfContainedDefault::False,
+            "true" | "wasm" => LinkSelfContainedDefault::True,
+            "musl" => LinkSelfContainedDefault::Musl,
+            "mingw" => LinkSelfContainedDefault::Mingw,
             _ => return Err(()),
         })
     }
 }
 
-impl ToJson for CrtObjectsFallback {
+impl ToJson for LinkSelfContainedDefault {
     fn to_json(&self) -> Json {
         match *self {
-            CrtObjectsFallback::Musl => "musl",
-            CrtObjectsFallback::Mingw => "mingw",
-            CrtObjectsFallback::Wasm => "wasm",
+            LinkSelfContainedDefault::False => "false",
+            LinkSelfContainedDefault::True => "true",
+            LinkSelfContainedDefault::Musl => "musl",
+            LinkSelfContainedDefault::Mingw => "mingw",
         }
         .to_json()
     }

compiler/rustc_target/src/spec/linux_musl_base.rs

@@ -1,13 +1,13 @@
-use crate::spec::crt_objects::{self, CrtObjectsFallback};
+use crate::spec::crt_objects::{self, LinkSelfContainedDefault};
 use crate::spec::TargetOptions;
 
 pub fn opts() -> TargetOptions {
     let mut base = super::linux_base::opts();
 
     base.env = "musl".into();
-    base.pre_link_objects_fallback = crt_objects::pre_musl_fallback();
-    base.post_link_objects_fallback = crt_objects::post_musl_fallback();
-    base.crt_objects_fallback = Some(CrtObjectsFallback::Musl);
+    base.pre_link_objects_self_contained = crt_objects::pre_musl_self_contained();
+    base.post_link_objects_self_contained = crt_objects::post_musl_self_contained();
+    base.link_self_contained = LinkSelfContainedDefault::Musl;
 
     // These targets statically link libc by default
     base.crt_static_default = true;