rust-lang · bors · Jun 24, 2022 · Jun 1, 2022 · Jun 17, 2022 · Nov 26, 2021
diff --git a/Cargo.lock b/Cargo.lock
@@ -1428,9 +1428,9 @@ checksum = "d79238883cf0307100b90aba4a755d8051a3182305dfe7f649a1e9dc0517006f"
 
 [[package]]
 name = "futf"
-version = "0.1.4"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c9c1ce3fa9336301af935ab852c437817d14cd33690446569392e65170aac3b"
+checksum = "df420e2e84819663797d1ec6544b13c5be84629e7bb00dc960d6917db2987843"
 dependencies = [
  "mac",
  "new_debug_unreachable",
@@ -1713,6 +1713,7 @@ version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8c21d40587b92fa6a6c6e3c1bdbf87d75511db5672f9c93175574b3a00df1758"
 dependencies = [
+ "ahash",
  "compiler_builtins",
  "rustc-std-workspace-alloc",
  "rustc-std-workspace-core",
@@ -2571,6 +2572,18 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "object"
+version = "0.29.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "21158b2c33aa6d4561f1c0a6ea283ca92bc54802a93b263e910746d679a7eb53"
+dependencies = [
+ "crc32fast",
+ "hashbrown 0.12.0",
+ "indexmap",
+ "memchr",
+]
+
 [[package]]
 name = "odht"
 version = "0.3.1"
@@ -3720,7 +3733,7 @@ dependencies = [
  "itertools",
  "jobserver",
  "libc",
- "object 0.28.4",
+ "object 0.29.0",
  "pathdiff",
  "regex",
  "rustc_apfloat",
@@ -5191,9 +5204,9 @@ dependencies = [
 
 [[package]]
 name = "tendril"
-version = "0.4.1"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "707feda9f2582d5d680d733e38755547a3e8fb471e7ba11452ecfd9ce93a5d3b"
+checksum = "d24a120c5fc464a3458240ee02c299ebcb9d67b5249c8848b09d639dca8d7bb0"
 dependencies = [
  "futf",
  "mac",

diff --git a/compiler/rustc_ast/src/entry.rs b/compiler/rustc_ast/src/entry.rs
@@ -2,7 +2,7 @@
 pub enum EntryPointType {
     None,
     MainNamed,
-    MainAttr,
+    RustcMainAttr,
     Start,
     OtherMain, // Not an entry point, but some other function named main
 }
diff --git a/compiler/rustc_builtin_macros/src/test_harness.rs b/compiler/rustc_builtin_macros/src/test_harness.rs
@@ -147,7 +147,7 @@ fn entry_point_type(sess: &Session, item: &ast::Item, depth: usize) -> EntryPoin
             if sess.contains_name(&item.attrs, sym::start) {
                 EntryPointType::Start
             } else if sess.contains_name(&item.attrs, sym::rustc_main) {
-                EntryPointType::MainAttr
+                EntryPointType::RustcMainAttr
             } else if item.ident.name == sym::main {
                 if depth == 0 {
                     // This is a top-level function so can be 'main'
@@ -177,12 +177,12 @@ impl<'a> MutVisitor for EntryPointCleaner<'a> {
         let item = noop_flat_map_item(i, self).expect_one("noop did something");
         self.depth -= 1;
 
-        // Remove any #[main] or #[start] from the AST so it doesn't
+        // Remove any #[rustc_main] or #[start] from the AST so it doesn't
         // clash with the one we're going to add, but mark it as
         // #[allow(dead_code)] to avoid printing warnings.
         let item = match entry_point_type(self.sess, &item, self.depth) {
-            EntryPointType::MainNamed | EntryPointType::MainAttr | EntryPointType::Start => item
-                .map(|ast::Item { id, ident, attrs, kind, vis, span, tokens }| {
+            EntryPointType::MainNamed | EntryPointType::RustcMainAttr | EntryPointType::Start => {
+                item.map(|ast::Item { id, ident, attrs, kind, vis, span, tokens }| {
                     let allow_ident = Ident::new(sym::allow, self.def_site);
                     let dc_nested =
                         attr::mk_nested_word_item(Ident::new(sym::dead_code, self.def_site));
@@ -197,7 +197,8 @@ impl<'a> MutVisitor for EntryPointCleaner<'a> {
                         .collect();
 
                     ast::Item { id, ident, attrs, kind, vis, span, tokens }
-                }),
+                })
+            }
             EntryPointType::None | EntryPointType::OtherMain => item,
         };
 

diff --git a/compiler/rustc_codegen_llvm/src/context.rs b/compiler/rustc_codegen_llvm/src/context.rs
@@ -906,7 +906,7 @@ impl<'ll> CodegenCx<'ll, '_> {
             return eh_catch_typeinfo;
         }
         let tcx = self.tcx;
-        assert!(self.sess().target.is_like_emscripten);
+        assert!(self.sess().target.os == "emscripten");
         let eh_catch_typeinfo = match tcx.lang_items().eh_catch_typeinfo() {
             Some(def_id) => self.get_static(def_id),
             _ => {

diff --git a/compiler/rustc_codegen_llvm/src/intrinsic.rs b/compiler/rustc_codegen_llvm/src/intrinsic.rs
@@ -441,7 +441,7 @@ fn try_intrinsic<'ll>(
         bx.store(bx.const_i32(0), dest, ret_align);
     } else if wants_msvc_seh(bx.sess()) {
         codegen_msvc_try(bx, try_func, data, catch_func, dest);
-    } else if bx.sess().target.is_like_emscripten {
+    } else if bx.sess().target.os == "emscripten" {
         codegen_emcc_try(bx, try_func, data, catch_func, dest);
     } else {
         codegen_gnu_try(bx, try_func, data, catch_func, dest);

diff --git a/compiler/rustc_codegen_ssa/Cargo.toml b/compiler/rustc_codegen_ssa/Cargo.toml
@@ -42,6 +42,6 @@ rustc_target = { path = "../rustc_target" }
 rustc_session = { path = "../rustc_session" }
 
 [dependencies.object]
-version = "0.28.4"
+version = "0.29.0"
 default-features = false
 features = ["read_core", "elf", "macho", "pe", "unaligned", "archive", "write"]
diff --git a/compiler/rustc_codegen_ssa/src/back/link.rs b/compiler/rustc_codegen_ssa/src/back/link.rs
@@ -2031,7 +2031,7 @@ fn add_order_independent_options(
 
     add_link_script(cmd, sess, tmpdir, crate_type);
 
-    if sess.target.is_like_fuchsia && crate_type == CrateType::Executable {
+    if sess.target.os == "fuchsia" && crate_type == CrateType::Executable {
         let prefix = if sess.opts.debugging_opts.sanitizer.contains(SanitizerSet::ADDRESS) {
             "asan/"
         } else {
@@ -2051,7 +2051,7 @@ fn add_order_independent_options(
         cmd.no_crt_objects();
     }
 
-    if sess.target.is_like_emscripten {
+    if sess.target.os == "emscripten" {
         cmd.arg("-s");
         cmd.arg(if sess.panic_strategy() == PanicStrategy::Abort {
             "DISABLE_EXCEPTION_CATCHING=1"

diff --git a/compiler/rustc_codegen_ssa/src/back/metadata.rs b/compiler/rustc_codegen_ssa/src/back/metadata.rs
@@ -130,7 +130,7 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
     };
 
     let mut file = write::Object::new(binary_format, architecture, endianness);
-    match architecture {
+    let e_flags = match architecture {
         Architecture::Mips => {
             let arch = match sess.target.options.cpu.as_ref() {
                 "mips1" => elf::EF_MIPS_ARCH_1,
@@ -149,7 +149,7 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
             if sess.target.options.cpu.contains("r6") {
                 e_flags |= elf::EF_MIPS_NAN2008;
             }
-            file.flags = FileFlags::Elf { e_flags };
+            e_flags
         }
         Architecture::Mips64 => {
             // copied from `mips64el-linux-gnuabi64-gcc foo.c -c`
@@ -160,17 +160,26 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
                 } else {
                     elf::EF_MIPS_ARCH_64R2
                 };
-            file.flags = FileFlags::Elf { e_flags };
+            e_flags
         }
         Architecture::Riscv64 if sess.target.options.features.contains("+d") => {
             // copied from `riscv64-linux-gnu-gcc foo.c -c`, note though
             // that the `+d` target feature represents whether the double
             // float abi is enabled.
             let e_flags = elf::EF_RISCV_RVC | elf::EF_RISCV_FLOAT_ABI_DOUBLE;
-            file.flags = FileFlags::Elf { e_flags };
+            e_flags
         }
-        _ => {}
+        _ => 0,
+    };
+    // adapted from LLVM's `MCELFObjectTargetWriter::getOSABI`
+    let os_abi = match sess.target.options.os.as_ref() {
+        "hermit" => elf::ELFOSABI_STANDALONE,
+        "freebsd" => elf::ELFOSABI_FREEBSD,
+        "solaris" => elf::ELFOSABI_SOLARIS,
+        _ => elf::ELFOSABI_NONE,
     };
+    let abi_version = 0;
+    file.flags = FileFlags::Elf { os_abi, abi_version, e_flags };
     Some(file)
 }
 

diff --git a/compiler/rustc_metadata/src/creader.rs b/compiler/rustc_metadata/src/creader.rs
@@ -133,6 +133,10 @@ impl CStore {
         CrateNum::new(self.metas.len() - 1)
     }
 
+    pub fn has_crate_data(&self, cnum: CrateNum) -> bool {
+        self.metas[cnum].is_some()
+    }
+
     pub(crate) fn get_crate_data(&self, cnum: CrateNum) -> CrateMetadataRef<'_> {
         let cdata = self.metas[cnum]
             .as_ref()

diff --git a/compiler/rustc_middle/src/ty/print/pretty.rs b/compiler/rustc_middle/src/ty/print/pretty.rs
@@ -5,7 +5,7 @@ use crate::ty::{
     TypeSuperFoldable,
 };
 use rustc_apfloat::ieee::{Double, Single};
-use rustc_data_structures::fx::FxHashMap;
+use rustc_data_structures::fx::{FxHashMap, FxIndexMap};
 use rustc_data_structures::sso::SsoHashSet;
 use rustc_hir as hir;
 use rustc_hir::def::{self, CtorKind, DefKind, Namespace};
@@ -779,8 +779,8 @@ pub trait PrettyPrinter<'tcx>:
         // by looking up the projections associated with the def_id.
         let bounds = self.tcx().bound_explicit_item_bounds(def_id);
 
-        let mut traits = BTreeMap::new();
-        let mut fn_traits = BTreeMap::new();
+        let mut traits = FxIndexMap::default();
+        let mut fn_traits = FxIndexMap::default();
         let mut is_sized = false;
 
         for predicate in bounds.transpose_iter().map(|e| e.map_bound(|(p, _)| *p)) {
@@ -856,7 +856,7 @@ pub trait PrettyPrinter<'tcx>:
                     p!(")");
                     if let Term::Ty(ty) = return_ty.skip_binder() {
                         if !ty.is_unit() {
-                            p!("-> ", print(return_ty));
+                            p!(" -> ", print(return_ty));
                         }
                     }
                     p!(write("{}", if paren_needed { ")" } else { "" }));
@@ -970,11 +970,11 @@ pub trait PrettyPrinter<'tcx>:
         &mut self,
         trait_ref: ty::PolyTraitRef<'tcx>,
         proj_ty: Option<(DefId, ty::Binder<'tcx, Term<'tcx>>)>,
-        traits: &mut BTreeMap<
+        traits: &mut FxIndexMap<
             ty::PolyTraitRef<'tcx>,
-            BTreeMap<DefId, ty::Binder<'tcx, Term<'tcx>>>,
+            FxIndexMap<DefId, ty::Binder<'tcx, Term<'tcx>>>,
         >,
-        fn_traits: &mut BTreeMap<ty::PolyTraitRef<'tcx>, OpaqueFnEntry<'tcx>>,
+        fn_traits: &mut FxIndexMap<ty::PolyTraitRef<'tcx>, OpaqueFnEntry<'tcx>>,
     ) {
         let trait_def_id = trait_ref.def_id();
 
@@ -1110,19 +1110,18 @@ pub trait PrettyPrinter<'tcx>:
         // Builtin bounds.
         // FIXME(eddyb) avoid printing twice (needed to ensure
         // that the auto traits are sorted *and* printed via cx).
-        let mut auto_traits: Vec<_> =
-            predicates.auto_traits().map(|did| (self.tcx().def_path_str(did), did)).collect();
+        let mut auto_traits: Vec<_> = predicates.auto_traits().collect();
 
         // The auto traits come ordered by `DefPathHash`. While
         // `DefPathHash` is *stable* in the sense that it depends on
         // neither the host nor the phase of the moon, it depends
         // "pseudorandomly" on the compiler version and the target.
         //
-        // To avoid that causing instabilities in compiletest
+        // To avoid causing instabilities in compiletest
         // output, sort the auto-traits alphabetically.
-        auto_traits.sort();
+        auto_traits.sort_by_cached_key(|did| self.tcx().def_path_str(*did));
 
-        for (_, def_id) in auto_traits {
+        for def_id in auto_traits {
             if !first {
                 p!(" + ");
             }

diff --git a/compiler/rustc_passes/src/entry.rs b/compiler/rustc_passes/src/entry.rs
@@ -56,7 +56,7 @@ fn entry_point_type(ctxt: &EntryContext<'_>, id: ItemId, at_root: bool) -> Entry
     if ctxt.tcx.sess.contains_name(attrs, sym::start) {
         EntryPointType::Start
     } else if ctxt.tcx.sess.contains_name(attrs, sym::rustc_main) {
-        EntryPointType::MainAttr
+        EntryPointType::RustcMainAttr
     } else {
         if let Some(name) = ctxt.tcx.opt_item_name(id.def_id.to_def_id())
             && name == sym::main {
@@ -95,21 +95,21 @@ fn find_item(id: ItemId, ctxt: &mut EntryContext<'_>) {
         EntryPointType::OtherMain => {
             ctxt.non_main_fns.push(ctxt.tcx.def_span(id.def_id));
         }
-        EntryPointType::MainAttr => {
+        EntryPointType::RustcMainAttr => {
             if ctxt.attr_main_fn.is_none() {
                 ctxt.attr_main_fn = Some((id.def_id, ctxt.tcx.def_span(id.def_id.to_def_id())));
             } else {
                 struct_span_err!(
                     ctxt.tcx.sess,
                     ctxt.tcx.def_span(id.def_id.to_def_id()),
                     E0137,
-                    "multiple functions with a `#[main]` attribute"
+                    "multiple functions with a `#[rustc_main]` attribute"
                 )
                 .span_label(
                     ctxt.tcx.def_span(id.def_id.to_def_id()),
-                    "additional `#[main]` function",
+                    "additional `#[rustc_main]` function",
                 )
-                .span_label(ctxt.attr_main_fn.unwrap().1, "first `#[main]` function")
+                .span_label(ctxt.attr_main_fn.unwrap().1, "first `#[rustc_main]` function")
                 .emit();
             }
         }

diff --git a/compiler/rustc_passes/src/weak_lang_items.rs b/compiler/rustc_passes/src/weak_lang_items.rs
@@ -17,7 +17,7 @@ pub fn check_crate<'tcx>(tcx: TyCtxt<'tcx>, items: &mut lang_items::LanguageItem
     if items.eh_personality().is_none() {
         items.missing.push(LangItem::EhPersonality);
     }
-    if tcx.sess.target.is_like_emscripten && items.eh_catch_typeinfo().is_none() {
+    if tcx.sess.target.os == "emscripten" && items.eh_catch_typeinfo().is_none() {
         items.missing.push(LangItem::EhCatchTypeinfo);
     }
 

diff --git a/compiler/rustc_resolve/src/late.rs b/compiler/rustc_resolve/src/late.rs
@@ -3514,7 +3514,9 @@ impl<'a: 'ast, 'b, 'ast> LateResolutionVisitor<'a, 'b, 'ast> {
                     })
                 });
             }
-            ExprKind::Async(..) | ExprKind::Closure(..) => {
+            // For closures, ClosureOrAsyncRibKind is added in visit_fn
+            ExprKind::Closure(..) => visit::walk_expr(self, expr),
+            ExprKind::Async(..) => {
                 self.with_label_rib(ClosureOrAsyncRibKind, |this| visit::walk_expr(this, expr));
             }
             ExprKind::Repeat(ref elem, ref ct) => {

diff --git a/compiler/rustc_target/src/asm/aarch64.rs b/compiler/rustc_target/src/asm/aarch64.rs
@@ -74,7 +74,7 @@ impl AArch64InlineAsmRegClass {
 }
 
 pub fn target_reserves_x18(target: &Target) -> bool {
-    target.os == "android" || target.is_like_fuchsia || target.is_like_osx || target.is_like_windows
+    target.os == "android" || target.os == "fuchsia" || target.is_like_osx || target.is_like_windows
 }
 
 fn reserved_x18(

diff --git a/compiler/rustc_target/src/spec/fuchsia_base.rs b/compiler/rustc_target/src/spec/fuchsia_base.rs
@@ -28,7 +28,6 @@ pub fn opts() -> TargetOptions {
         dynamic_linking: true,
         executables: true,
         families: cvs!["unix"],
-        is_like_fuchsia: true,
         pre_link_args,
         pre_link_objects: crt_objects::new(&[
             (LinkOutputKind::DynamicNoPicExe, &["Scrt1.o"]),

diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
@@ -1273,12 +1273,6 @@ pub struct TargetOptions {
     ///   - uses SEH-based unwinding,
     ///   - supports control flow guard mechanism.
     pub is_like_msvc: bool,
-    /// Whether the target toolchain is like Emscripten's. Only useful for compiling with
-    /// Emscripten toolchain.
-    /// Defaults to false.
-    pub is_like_emscripten: bool,
-    /// Whether the target toolchain is like Fuchsia's.
-    pub is_like_fuchsia: bool,
     /// Whether a target toolchain is like WASM.
     pub is_like_wasm: bool,
     /// Version of DWARF to use if not using the default.
@@ -1505,9 +1499,7 @@ impl Default for TargetOptions {
             is_like_osx: false,
             is_like_solaris: false,
             is_like_windows: false,
-            is_like_emscripten: false,
             is_like_msvc: false,
-            is_like_fuchsia: false,
             is_like_wasm: false,
             dwarf_version: None,
             linker_is_gnu: true,
@@ -2112,8 +2104,6 @@ impl Target {
         key!(is_like_solaris, bool);
         key!(is_like_windows, bool);
         key!(is_like_msvc, bool);
-        key!(is_like_emscripten, bool);
-        key!(is_like_fuchsia, bool);
         key!(is_like_wasm, bool);
         key!(dwarf_version, Option<u32>);
         key!(linker_is_gnu, bool);
@@ -2358,8 +2348,6 @@ impl ToJson for Target {
         target_option_val!(is_like_solaris);
         target_option_val!(is_like_windows);
         target_option_val!(is_like_msvc);
-        target_option_val!(is_like_emscripten);
-        target_option_val!(is_like_fuchsia);
         target_option_val!(is_like_wasm);
         target_option_val!(dwarf_version);
         target_option_val!(linker_is_gnu);