bootstrap: add rust.std-features config

.gitmodules

@@ -51,3 +51,7 @@
 	path = src/tools/enzyme
 	url = https://github.com/EnzymeAD/Enzyme.git
 	shallow = true
+[submodule "src/gcc"]
+	path = src/gcc
+	url = https://github.com/rust-lang/gcc.git
+	shallow = true

LICENSES/GCC-exception-3.1.txt

@@ -0,0 +1,30 @@
+GCC RUNTIME LIBRARY EXCEPTION
+
+Version 3.1, 31 March 2009
+
+Copyright © 2009 Free Software Foundation, Inc. <https://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
+
+This GCC Runtime Library Exception ("Exception") is an additional permission under section 7 of the GNU General Public License, version 3 ("GPLv3"). It applies to a given file (the "Runtime Library") that bears a notice placed by the copyright holder of the file stating that the file is governed by GPLv3 along with this Exception.
+
+When you use GCC to compile a program, GCC may combine portions of certain GCC header files and runtime libraries with the compiled program. The purpose of this Exception is to allow compilation of non-GPL (including proprietary) programs to use, in this way, the header files and runtime libraries covered by this Exception.
+0. Definitions.
+
+A file is an "Independent Module" if it either requires the Runtime Library for execution after a Compilation Process, or makes use of an interface provided by the Runtime Library, but is not otherwise based on the Runtime Library.
+
+"GCC" means a version of the GNU Compiler Collection, with or without modifications, governed by version 3 (or a specified later version) of the GNU General Public License (GPL) with the option of using any subsequent versions published by the FSF.
+
+"GPL-compatible Software" is software whose conditions of propagation, modification and use would permit combination with GCC in accord with the license of GCC.
+
+"Target Code" refers to output from any compiler for a real or virtual target processor architecture, in executable form or suitable for input to an assembler, loader, linker and/or execution phase. Notwithstanding that, Target Code does not include data in any format that is used as a compiler intermediate representation, or used for producing a compiler intermediate representation.
+
+The "Compilation Process" transforms code entirely represented in non-intermediate languages designed for human-written code, and/or in Java Virtual Machine byte code, into Target Code. Thus, for example, use of source code generators and preprocessors need not be considered part of the Compilation Process, since the Compilation Process can be understood as starting with the output of the generators or preprocessors.
+
+A Compilation Process is "Eligible" if it is done using GCC, alone or with other GPL-compatible software, or if it is done without using any work based on GCC. For example, using non-GPL-compatible Software to optimize any GCC intermediate representations would not qualify as an Eligible Compilation Process.
+1. Grant of Additional Permission.
+
+You have permission to propagate a work of Target Code formed by combining the Runtime Library with Independent Modules, even if such propagation would otherwise violate the terms of GPLv3, provided that all Target Code was generated by Eligible Compilation Processes. You may then convey such a combination under terms of your choice, consistent with the licensing of the Independent Modules.
+2. No Weakening of GCC Copyleft.
+
+The availability of this Exception does not imply any general presumption that third-party software is unaffected by the copyleft requirements of the license of GCC.

LICENSES/ISC.txt

@@ -0,0 +1,7 @@
+ISC License
+
+<copyright notice>
+
+Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

REUSE.toml

@@ -168,3 +168,37 @@ SPDX-FileCopyrightText = [
     "2003-2019 University of Illinois at Urbana-Champaign.",
 ]
 SPDX-License-Identifier = "NCSA AND Apache-2.0 WITH LLVM-exception"
+
+[[annotations]]
+path = "src/gcc/**"
+precedence = "override"
+SPDX-FileCopyrightText = [
+    "Copyright (C) 1997-2024 Free Software Foundation, Inc.",
+]
+SPDX-License-Identifier = "GPL-3.0-or-later"
+
+[[annotations]]
+path = "src/gcc/gcc/testsuite/**"
+precedence = "override"
+SPDX-FileCopyrightText = [
+    "Copyright (C) 2000-2024 Free Software Foundation, Inc.",
+]
+SPDX-License-Identifier = "GPL-2.0-only"
+
+[[annotations]]
+path = "src/gcc/gcc/testsuite/c-c++-common/analyzer/*.c"
+precedence = "override"
+SPDX-FileCopyrightText = [
+    "Copyright (c) 2007-2011 Atheros Communications Inc.",
+    "Copyright (c) 2011-2012,2017 Qualcomm Atheros, Inc.",
+    "Copyright (c) 2016-2017 Erik Stromdahl <erik.stromdahl@gmail.com>",
+]
+SPDX-License-Identifier = "ISC"
+
+[[annotations]]
+path = "src/gcc/libstdc++-v3/config/os/aix/os_defines.h"
+precedence = "override"
+SPDX-FileCopyrightText = [
+    "Copyright (C) 2000-2024 Free Software Foundation, Inc.",
+]
+SPDX-License-Identifier = "GCC-exception-3.1"

compiler/rustc_arena/src/lib.rs

@@ -614,34 +614,34 @@ pub macro declare_arena([$($a:tt $name:ident: $ty:ty,)*]) {
 
     pub trait ArenaAllocatable<'tcx, C = rustc_arena::IsNotCopy>: Sized {
         #[allow(clippy::mut_from_ref)]
-        fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut Self;
+        fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut Self;
         #[allow(clippy::mut_from_ref)]
-        fn allocate_from_iter<'a>(
-            arena: &'a Arena<'tcx>,
+        fn allocate_from_iter(
+            arena: &'tcx Arena<'tcx>,
             iter: impl ::std::iter::IntoIterator<Item = Self>,
-        ) -> &'a mut [Self];
+        ) -> &'tcx mut [Self];
     }
 
     // Any type that impls `Copy` can be arena-allocated in the `DroplessArena`.
     impl<'tcx, T: Copy> ArenaAllocatable<'tcx, rustc_arena::IsCopy> for T {
         #[inline]
         #[allow(clippy::mut_from_ref)]
-        fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut Self {
+        fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut Self {
             arena.dropless.alloc(self)
         }
         #[inline]
         #[allow(clippy::mut_from_ref)]
-        fn allocate_from_iter<'a>(
-            arena: &'a Arena<'tcx>,
+        fn allocate_from_iter(
+            arena: &'tcx Arena<'tcx>,
             iter: impl ::std::iter::IntoIterator<Item = Self>,
-        ) -> &'a mut [Self] {
+        ) -> &'tcx mut [Self] {
             arena.dropless.alloc_from_iter(iter)
         }
     }
     $(
         impl<'tcx> ArenaAllocatable<'tcx, rustc_arena::IsNotCopy> for $ty {
             #[inline]
-            fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut Self {
+            fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut Self {
                 if !::std::mem::needs_drop::<Self>() {
                     arena.dropless.alloc(self)
                 } else {
@@ -651,10 +651,10 @@ pub macro declare_arena([$($a:tt $name:ident: $ty:ty,)*]) {
 
             #[inline]
             #[allow(clippy::mut_from_ref)]
-            fn allocate_from_iter<'a>(
-                arena: &'a Arena<'tcx>,
+            fn allocate_from_iter(
+                arena: &'tcx Arena<'tcx>,
                 iter: impl ::std::iter::IntoIterator<Item = Self>,
-            ) -> &'a mut [Self] {
+            ) -> &'tcx mut [Self] {
                 if !::std::mem::needs_drop::<Self>() {
                     arena.dropless.alloc_from_iter(iter)
                 } else {
@@ -667,7 +667,7 @@ pub macro declare_arena([$($a:tt $name:ident: $ty:ty,)*]) {
     impl<'tcx> Arena<'tcx> {
         #[inline]
         #[allow(clippy::mut_from_ref)]
-        pub fn alloc<T: ArenaAllocatable<'tcx, C>, C>(&self, value: T) -> &mut T {
+        pub fn alloc<T: ArenaAllocatable<'tcx, C>, C>(&'tcx self, value: T) -> &mut T {
             value.allocate_on(self)
         }
 
@@ -691,7 +691,7 @@ pub macro declare_arena([$($a:tt $name:ident: $ty:ty,)*]) {
 
         #[allow(clippy::mut_from_ref)]
         pub fn alloc_from_iter<T: ArenaAllocatable<'tcx, C>, C>(
-            &self,
+            &'tcx self,
             iter: impl ::std::iter::IntoIterator<Item = T>,
         ) -> &mut [T] {
             T::allocate_from_iter(self, iter)

compiler/rustc_ast/src/ast.rs

@@ -1188,14 +1188,7 @@ impl Expr {
     ///
     /// Does not ensure that the path resolves to a const param, the caller should check this.
     pub fn is_potential_trivial_const_arg(&self) -> bool {
-        let this = if let ExprKind::Block(block, None) = &self.kind
-            && let [stmt] = block.stmts.as_slice()
-            && let StmtKind::Expr(expr) = &stmt.kind
-        {
-            expr
-        } else {
-            self
-        };
+        let this = self.maybe_unwrap_block();
 
         if let ExprKind::Path(None, path) = &this.kind
             && path.is_potential_trivial_const_arg()
@@ -1206,6 +1199,17 @@ impl Expr {
         }
     }
 
+    pub fn maybe_unwrap_block(&self) -> &Expr {
+        if let ExprKind::Block(block, None) = &self.kind
+            && let [stmt] = block.stmts.as_slice()
+            && let StmtKind::Expr(expr) = &stmt.kind
+        {
+            expr
+        } else {
+            self
+        }
+    }
+
     pub fn to_bound(&self) -> Option<GenericBound> {
         match &self.kind {
             ExprKind::Path(None, path) => Some(GenericBound::Trait(
@@ -2418,11 +2422,22 @@ impl InlineAsmOperand {
     }
 }
 
+#[derive(Clone, Copy, Encodable, Decodable, Debug, HashStable_Generic)]
+pub enum AsmMacro {
+    /// The `asm!` macro
+    Asm,
+    /// The `global_asm!` macro
+    GlobalAsm,
+    /// The `naked_asm!` macro
+    NakedAsm,
+}
+
 /// Inline assembly.
 ///
 /// E.g., `asm!("NOP");`.
 #[derive(Clone, Encodable, Decodable, Debug)]
 pub struct InlineAsm {
+    pub asm_macro: AsmMacro,
     pub template: Vec<InlineAsmTemplatePiece>,
     pub template_strs: Box<[(Symbol, Option<Symbol>, Span)]>,
     pub operands: Vec<(InlineAsmOperand, Span)>,
@@ -2591,12 +2606,12 @@ impl CoroutineKind {
         }
     }
 
-    pub fn is_async(self) -> bool {
-        matches!(self, CoroutineKind::Async { .. })
-    }
-
-    pub fn is_gen(self) -> bool {
-        matches!(self, CoroutineKind::Gen { .. })
+    pub fn as_str(self) -> &'static str {
+        match self {
+            CoroutineKind::Async { .. } => "async",
+            CoroutineKind::Gen { .. } => "gen",
+            CoroutineKind::AsyncGen { .. } => "async gen",
+        }
     }
 
     pub fn closure_id(self) -> NodeId {
@@ -3475,7 +3490,7 @@ impl From<ForeignItemKind> for ItemKind {
     fn from(foreign_item_kind: ForeignItemKind) -> ItemKind {
         match foreign_item_kind {
             ForeignItemKind::Static(box static_foreign_item) => {
-                ItemKind::Static(Box::new(static_foreign_item.into()))
+                ItemKind::Static(Box::new(static_foreign_item))
             }
             ForeignItemKind::Fn(fn_kind) => ItemKind::Fn(fn_kind),
             ForeignItemKind::TyAlias(ty_alias_kind) => ItemKind::TyAlias(ty_alias_kind),
@@ -3489,9 +3504,7 @@ impl TryFrom<ItemKind> for ForeignItemKind {
 
     fn try_from(item_kind: ItemKind) -> Result<ForeignItemKind, ItemKind> {
         Ok(match item_kind {
-            ItemKind::Static(box static_item) => {
-                ForeignItemKind::Static(Box::new(static_item.into()))
-            }
+            ItemKind::Static(box static_item) => ForeignItemKind::Static(Box::new(static_item)),
             ItemKind::Fn(fn_kind) => ForeignItemKind::Fn(fn_kind),
             ItemKind::TyAlias(ty_alias_kind) => ForeignItemKind::TyAlias(ty_alias_kind),
             ItemKind::MacCall(a) => ForeignItemKind::MacCall(a),

compiler/rustc_ast/src/ast_traits.rs

@@ -153,7 +153,7 @@ impl HasTokens for StmtKind {
             StmtKind::Let(local) => local.tokens.as_ref(),
             StmtKind::Item(item) => item.tokens(),
             StmtKind::Expr(expr) | StmtKind::Semi(expr) => expr.tokens(),
-            StmtKind::Empty => return None,
+            StmtKind::Empty => None,
             StmtKind::MacCall(mac) => mac.tokens.as_ref(),
         }
     }
@@ -162,7 +162,7 @@ impl HasTokens for StmtKind {
             StmtKind::Let(local) => Some(&mut local.tokens),
             StmtKind::Item(item) => item.tokens_mut(),
             StmtKind::Expr(expr) | StmtKind::Semi(expr) => expr.tokens_mut(),
-            StmtKind::Empty => return None,
+            StmtKind::Empty => None,
             StmtKind::MacCall(mac) => Some(&mut mac.tokens),
         }
     }

compiler/rustc_ast/src/entry.rs

@@ -45,18 +45,16 @@ pub fn entry_point_type(
         EntryPointType::Start
     } else if attr::contains_name(attrs, sym::rustc_main) {
         EntryPointType::RustcMainAttr
-    } else {
-        if let Some(name) = name
-            && name == sym::main
-        {
-            if at_root {
-                // This is a top-level function so it can be `main`.
-                EntryPointType::MainNamed
-            } else {
-                EntryPointType::OtherMain
-            }
+    } else if let Some(name) = name
+        && name == sym::main
+    {
+        if at_root {
+            // This is a top-level function so it can be `main`.
+            EntryPointType::MainNamed
         } else {
-            EntryPointType::None
+            EntryPointType::OtherMain
         }
+    } else {
+        EntryPointType::None
     }
 }

compiler/rustc_ast/src/mut_visit.rs

@@ -1388,6 +1388,7 @@ fn walk_anon_const<T: MutVisitor>(vis: &mut T, AnonConst { id, value }: &mut Ano
 fn walk_inline_asm<T: MutVisitor>(vis: &mut T, asm: &mut InlineAsm) {
     // FIXME: Visit spans inside all this currently ignored stuff.
     let InlineAsm {
+        asm_macro: _,
         template: _,
         template_strs: _,
         operands,

compiler/rustc_ast/src/visit.rs

@@ -976,6 +976,7 @@ pub fn walk_anon_const<'a, V: Visitor<'a>>(visitor: &mut V, constant: &'a AnonCo
 
 pub fn walk_inline_asm<'a, V: Visitor<'a>>(visitor: &mut V, asm: &'a InlineAsm) -> V::Result {
     let InlineAsm {
+        asm_macro: _,
         template: _,
         template_strs: _,
         operands,

compiler/rustc_ast_lowering/src/asm.rs

@@ -220,9 +220,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                             let parent_def_id = self.current_def_id_parent;
                             let node_id = self.next_node_id();
                             // HACK(min_generic_const_args): see lower_anon_const
-                            if !self.tcx.features().const_arg_path
-                                || !expr.is_potential_trivial_const_arg()
-                            {
+                            if !expr.is_potential_trivial_const_arg() {
                                 self.create_def(
                                     parent_def_id,
                                     node_id,
@@ -474,8 +472,14 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         );
         let line_spans =
             self.arena.alloc_from_iter(asm.line_spans.iter().map(|span| self.lower_span(*span)));
-        let hir_asm =
-            hir::InlineAsm { template, template_strs, operands, options: asm.options, line_spans };
+        let hir_asm = hir::InlineAsm {
+            asm_macro: asm.asm_macro,
+            template,
+            template_strs,
+            operands,
+            options: asm.options,
+            line_spans,
+        };
         self.arena.alloc(hir_asm)
     }
 }

compiler/rustc_ast_lowering/src/expr.rs

@@ -387,7 +387,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                 let node_id = self.next_node_id();
 
                 // HACK(min_generic_const_args): see lower_anon_const
-                if !self.tcx.features().const_arg_path || !arg.is_potential_trivial_const_arg() {
+                if !arg.is_potential_trivial_const_arg() {
                     // Add a definition for the in-band const def.
                     self.create_def(parent_def_id, node_id, kw::Empty, DefKind::AnonConst, f.span);
                 }
@@ -1837,7 +1837,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
             Safety::Default,
             sym::allow,
             sym::unreachable_code,
-            self.lower_span(span),
+            try_span,
         );
         let attrs: AttrVec = thin_vec![attr];