Rollup of 9 pull requests

compiler/rustc_ast/src/visit.rs

@@ -884,7 +884,7 @@ macro_rules! common_visitor_and_walkers {
                 TyKind::BareFn(function_declaration) => {
                     let BareFnTy { safety, ext: _, generic_params, decl, decl_span } =
                         &$($mut)? **function_declaration;
-                    visit_safety(vis, safety);
+                    try_visit!(visit_safety(vis, safety));
                     try_visit!(visit_generic_params(vis, generic_params));
                     try_visit!(vis.visit_fn_decl(decl));
                     try_visit!(visit_span(vis, decl_span));
@@ -1235,7 +1235,7 @@ macro_rules! common_visitor_and_walkers {
                     bounds,
                     bound_generic_params,
                 }) => {
-                    visit_generic_params(vis, bound_generic_params);
+                    try_visit!(visit_generic_params(vis, bound_generic_params));
                     try_visit!(vis.visit_ty(bounded_ty));
                     walk_list!(vis, visit_param_bound, bounds, BoundKind::Bound);
                 }
@@ -1420,7 +1420,7 @@ macro_rules! common_visitor_and_walkers {
                     let StructExpr { qself, path, fields, rest } = &$($mut)?**se;
                     try_visit!(vis.visit_qself(qself));
                     try_visit!(vis.visit_path(path));
-                    visit_expr_fields(vis, fields);
+                    try_visit!(visit_expr_fields(vis, fields));
                     match rest {
                         StructRest::Base(expr) => try_visit!(vis.visit_expr(expr)),
                         StructRest::Rest(_span) => {}

compiler/rustc_ast_passes/src/ast_validation.rs

@@ -224,20 +224,6 @@ impl<'a> AstValidator<'a> {
         }
     }
 
-    fn visit_struct_field_def(&mut self, field: &'a FieldDef) {
-        if let Some(ref ident) = field.ident
-            && ident.name == kw::Underscore
-        {
-            self.visit_vis(&field.vis);
-            self.visit_ident(ident);
-            self.visit_ty_common(&field.ty);
-            self.walk_ty(&field.ty);
-            walk_list!(self, visit_attribute, &field.attrs);
-        } else {
-            self.visit_field_def(field);
-        }
-    }
-
     fn dcx(&self) -> DiagCtxtHandle<'a> {
         self.sess.dcx()
     }
@@ -1135,8 +1121,7 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
                 VariantData::Struct { fields, .. } => {
                     self.visit_attrs_vis_ident(&item.attrs, &item.vis, ident);
                     self.visit_generics(generics);
-                    // Permit `Anon{Struct,Union}` as field type.
-                    walk_list!(self, visit_struct_field_def, fields);
+                    walk_list!(self, visit_field_def, fields);
                 }
                 _ => visit::walk_item(self, item),
             },
@@ -1148,8 +1133,7 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
                     VariantData::Struct { fields, .. } => {
                         self.visit_attrs_vis_ident(&item.attrs, &item.vis, ident);
                         self.visit_generics(generics);
-                        // Permit `Anon{Struct,Union}` as field type.
-                        walk_list!(self, visit_struct_field_def, fields);
+                        walk_list!(self, visit_field_def, fields);
                     }
                     _ => visit::walk_item(self, item),
                 }

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -69,23 +69,6 @@ pub fn ensure_removed(dcx: DiagCtxtHandle<'_>, path: &Path) {
     }
 }
 
-fn check_link_info_print_request(sess: &Session, crate_types: &[CrateType]) {
-    let print_native_static_libs =
-        sess.opts.prints.iter().any(|p| p.kind == PrintKind::NativeStaticLibs);
-    let has_staticlib = crate_types.iter().any(|ct| *ct == CrateType::Staticlib);
-    if print_native_static_libs {
-        if !has_staticlib {
-            sess.dcx()
-                .warn(format!("cannot output linkage information without staticlib crate-type"));
-            sess.dcx()
-                .note(format!("consider `--crate-type staticlib` to print linkage information"));
-        } else if !sess.opts.output_types.should_link() {
-            sess.dcx()
-                .warn(format!("cannot output linkage information when --emit link is not passed"));
-        }
-    }
-}
-
 /// Performs the linkage portion of the compilation phase. This will generate all
 /// of the requested outputs for this compilation session.
 pub fn link_binary(
@@ -208,8 +191,6 @@ pub fn link_binary(
         }
     }
 
-    check_link_info_print_request(sess, &codegen_results.crate_info.crate_types);
-
     // Remove the temporary object file and metadata if we aren't saving temps.
     sess.time("link_binary_remove_temps", || {
         // If the user requests that temporaries are saved, don't delete any.

compiler/rustc_codegen_ssa/src/back/linker.rs

@@ -1829,6 +1829,7 @@ pub(crate) fn linked_symbols(
     for_each_exported_symbols_include_dep(tcx, crate_type, |symbol, info, cnum| {
         if info.level.is_below_threshold(export_threshold) && !tcx.is_compiler_builtins(cnum)
             || info.used
+            || info.rustc_std_internal_symbol
         {
             symbols.push((
                 symbol_export::linking_symbol_name_for_instance_in_crate(tcx, symbol, cnum),

compiler/rustc_codegen_ssa/src/back/metadata.rs

@@ -379,6 +379,24 @@ pub(super) fn elf_e_flags(architecture: Architecture, sess: &Session) -> u32 {
             };
             e_flags
         }
+        Architecture::PowerPc64 => {
+            const EF_PPC64_ABI_UNKNOWN: u32 = 0;
+            const EF_PPC64_ABI_ELF_V1: u32 = 1;
+            const EF_PPC64_ABI_ELF_V2: u32 = 2;
+
+            match sess.target.options.llvm_abiname.as_ref() {
+                // If the flags do not correctly indicate the ABI,
+                // linkers such as ld.lld assume that the ppc64 object files are always ELFv2
+                // which leads to broken binaries if ELFv1 is used for the object files.
+                "elfv1" => EF_PPC64_ABI_ELF_V1,
+                "elfv2" => EF_PPC64_ABI_ELF_V2,
+                "" if sess.target.options.binary_format.to_object() == BinaryFormat::Elf => {
+                    bug!("No ABI specified for this PPC64 ELF target");
+                }
+                // Fall back
+                _ => EF_PPC64_ABI_UNKNOWN,
+            }
+        }
         _ => 0,
     }
 }

compiler/rustc_codegen_ssa/src/back/symbol_export.rs

@@ -131,6 +131,9 @@ fn reachable_non_generics_provider(tcx: TyCtxt<'_>, _: LocalCrate) -> DefIdMap<S
                 used: codegen_attrs.flags.contains(CodegenFnAttrFlags::USED_COMPILER)
                     || codegen_attrs.flags.contains(CodegenFnAttrFlags::USED_LINKER)
                     || used,
+                rustc_std_internal_symbol: codegen_attrs
+                    .flags
+                    .contains(CodegenFnAttrFlags::RUSTC_STD_INTERNAL_SYMBOL),
             };
             (def_id.to_def_id(), info)
         })
@@ -143,6 +146,7 @@ fn reachable_non_generics_provider(tcx: TyCtxt<'_>, _: LocalCrate) -> DefIdMap<S
                 level: SymbolExportLevel::C,
                 kind: SymbolExportKind::Data,
                 used: false,
+                rustc_std_internal_symbol: false,
             },
         );
     }
@@ -191,6 +195,7 @@ fn exported_symbols_provider_local<'tcx>(
                         level: info.level,
                         kind: SymbolExportKind::Text,
                         used: info.used,
+                        rustc_std_internal_symbol: info.rustc_std_internal_symbol,
                     },
                 )
             })
@@ -207,6 +212,7 @@ fn exported_symbols_provider_local<'tcx>(
                 level: SymbolExportLevel::C,
                 kind: SymbolExportKind::Text,
                 used: false,
+                rustc_std_internal_symbol: false,
             },
         ));
     }
@@ -229,6 +235,7 @@ fn exported_symbols_provider_local<'tcx>(
                     level: SymbolExportLevel::Rust,
                     kind: SymbolExportKind::Text,
                     used: false,
+                    rustc_std_internal_symbol: true,
                 },
             ));
         }
@@ -243,6 +250,7 @@ fn exported_symbols_provider_local<'tcx>(
                 level: SymbolExportLevel::Rust,
                 kind: SymbolExportKind::Data,
                 used: false,
+                rustc_std_internal_symbol: true,
             },
         ))
     }
@@ -262,6 +270,7 @@ fn exported_symbols_provider_local<'tcx>(
                     level: SymbolExportLevel::C,
                     kind: SymbolExportKind::Data,
                     used: false,
+                    rustc_std_internal_symbol: false,
                 },
             )
         }));
@@ -287,6 +296,7 @@ fn exported_symbols_provider_local<'tcx>(
                     level: SymbolExportLevel::C,
                     kind: SymbolExportKind::Data,
                     used: false,
+                    rustc_std_internal_symbol: false,
                 },
             )
         }));
@@ -304,6 +314,7 @@ fn exported_symbols_provider_local<'tcx>(
                 level: SymbolExportLevel::C,
                 kind: SymbolExportKind::Data,
                 used: true,
+                rustc_std_internal_symbol: false,
             },
         ));
     }
@@ -379,6 +390,8 @@ fn exported_symbols_provider_local<'tcx>(
                 }
             }
 
+            // Note: These all set rustc_std_internal_symbol to false as generic functions must not
+            // be marked with this attribute and we are only handling generic functions here.
             match *mono_item {
                 MonoItem::Fn(Instance { def: InstanceKind::Item(def), args }) => {
                     let has_generics = args.non_erasable_generics().next().is_some();
@@ -394,6 +407,7 @@ fn exported_symbols_provider_local<'tcx>(
                                 level: SymbolExportLevel::Rust,
                                 kind: SymbolExportKind::Text,
                                 used: false,
+                                rustc_std_internal_symbol: false,
                             },
                         ));
                     }
@@ -416,6 +430,7 @@ fn exported_symbols_provider_local<'tcx>(
                                 level: SymbolExportLevel::Rust,
                                 kind: SymbolExportKind::Text,
                                 used: false,
+                                rustc_std_internal_symbol: false,
                             },
                         ));
                     }
@@ -432,6 +447,7 @@ fn exported_symbols_provider_local<'tcx>(
                             level: SymbolExportLevel::Rust,
                             kind: SymbolExportKind::Text,
                             used: false,
+                            rustc_std_internal_symbol: false,
                         },
                     ));
                 }
@@ -442,6 +458,7 @@ fn exported_symbols_provider_local<'tcx>(
                             level: SymbolExportLevel::Rust,
                             kind: SymbolExportKind::Text,
                             used: false,
+                            rustc_std_internal_symbol: false,
                         },
                     ));
                 }

compiler/rustc_codegen_ssa/src/base.rs

@@ -6,7 +6,7 @@ use std::time::{Duration, Instant};
 use itertools::Itertools;
 use rustc_abi::FIRST_VARIANT;
 use rustc_ast as ast;
-use rustc_ast::expand::allocator::{ALLOCATOR_METHODS, AllocatorKind, global_fn_name};
+use rustc_ast::expand::allocator::AllocatorKind;
 use rustc_attr_data_structures::OptimizeAttr;
 use rustc_data_structures::fx::{FxHashMap, FxIndexSet};
 use rustc_data_structures::profiling::{get_resident_set_size, print_time_passes_entry};
@@ -1039,26 +1039,6 @@ impl CrateInfo {
                         .collect::<Vec<_>>();
                     symbols.sort_unstable_by(|a, b| a.0.cmp(&b.0));
                     linked_symbols.extend(symbols);
-                    if tcx.allocator_kind(()).is_some() {
-                        // At least one crate needs a global allocator. This crate may be placed
-                        // after the crate that defines it in the linker order, in which case some
-                        // linkers return an error. By adding the global allocator shim methods to
-                        // the linked_symbols list, linking the generated symbols.o will ensure that
-                        // circular dependencies involving the global allocator don't lead to linker
-                        // errors.
-                        linked_symbols.extend(ALLOCATOR_METHODS.iter().map(|method| {
-                            (
-                                format!(
-                                    "{prefix}{}",
-                                    mangle_internal_symbol(
-                                        tcx,
-                                        global_fn_name(method.name).as_str()
-                                    )
-                                ),
-                                SymbolExportKind::Text,
-                            )
-                        }));
-                    }
                 });
         }