Merge branch 'rust-lang:master' into patch-1

Author: root-goblin

.gitmodules

@@ -47,3 +47,7 @@
 	path = src/tools/rustc-perf
 	url = https://github.com/rust-lang/rustc-perf.git
 	shallow = true
+[submodule "src/tools/enzyme"]
+	path = src/tools/enzyme
+	url = https://github.com/EnzymeAD/Enzyme.git
+	shallow = true

.mailmap

@@ -81,6 +81,7 @@ boolean_coercion <[email protected]>
 Boris Egorov <[email protected]> <[email protected]>
 bors <[email protected]> bors[bot] <26634292+bors[bot]@users.noreply.github.com>
 bors <[email protected]> bors[bot] <bors[bot]@users.noreply.github.com>
+Boxy <[email protected]> <[email protected]>
 Braden Nelson <[email protected]>
 Brandon Sanderson <[email protected]> Brandon Sanderson <[email protected]>
 Brett Cannon <[email protected]> Brett Cannon <[email protected]>
@@ -146,6 +147,7 @@ David Klein <[email protected]>
 David Manescu <[email protected]> <[email protected]>
 David Ross <[email protected]>
 David Wood <[email protected]> <[email protected]>
+David Wood <[email protected]> <[email protected]>
 Deadbeef <[email protected]>
 Deadbeef <[email protected]> <[email protected]>
 dependabot[bot] <dependabot[bot]@users.noreply.github.com> <27856297+dependabot-preview[bot]@users.noreply.github.com>

Cargo.lock

@@ -199,7 +199,7 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "01667f6f40216b9a0b2945e05fed5f1ad0ab6470e69cb9378001e37b1c0668e4"
 dependencies = [
- "object 0.36.3",
+ "object 0.36.4",
 ]
 
 [[package]]
@@ -2453,17 +2453,17 @@ dependencies = [
 
 [[package]]
 name = "object"
-version = "0.36.3"
+version = "0.36.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "27b64972346851a39438c60b341ebc01bba47464ae329e55cf343eb93964efd9"
+checksum = "084f1a5821ac4c651660a94a7153d27ac9d8a53736203f58b31945ded098070a"
 dependencies = [
  "crc32fast",
  "flate2",
  "hashbrown",
  "indexmap",
  "memchr",
  "ruzstd 0.7.0",
- "wasmparser 0.215.0",
+ "wasmparser",
 ]
 
 [[package]]
@@ -3129,11 +3129,11 @@ dependencies = [
  "build_helper",
  "gimli 0.31.0",
  "libc",
- "object 0.36.3",
+ "object 0.36.4",
  "regex",
  "serde_json",
  "similar",
- "wasmparser 0.216.0",
+ "wasmparser",
 ]
 
 [[package]]
@@ -3408,7 +3408,7 @@ dependencies = [
  "itertools",
  "libc",
  "measureme",
- "object 0.36.3",
+ "object 0.36.4",
  "rustc-demangle",
  "rustc_ast",
  "rustc_attr",
@@ -3447,7 +3447,7 @@ dependencies = [
  "itertools",
  "jobserver",
  "libc",
- "object 0.36.3",
+ "object 0.36.4",
  "pathdiff",
  "regex",
  "rustc_arena",
@@ -3569,6 +3569,7 @@ dependencies = [
  "rustc_hir_pretty",
  "rustc_hir_typeck",
  "rustc_incremental",
+ "rustc_index",
  "rustc_infer",
  "rustc_interface",
  "rustc_lint",
@@ -4166,6 +4167,7 @@ dependencies = [
  "rustc_errors",
  "rustc_feature",
  "rustc_fluent_macro",
+ "rustc_index",
  "rustc_lexer",
  "rustc_macros",
  "rustc_session",
@@ -4431,7 +4433,7 @@ name = "rustc_target"
 version = "0.0.0"
 dependencies = [
  "bitflags 2.6.0",
- "object 0.36.3",
+ "object 0.36.4",
  "rustc_abi",
  "rustc_data_structures",
  "rustc_feature",
@@ -5849,7 +5851,7 @@ dependencies = [
  "lexopt",
  "tempfile",
  "wasi-preview1-component-adapter-provider",
- "wasmparser 0.216.0",
+ "wasmparser",
  "wat",
  "wit-component",
  "wit-parser",
@@ -5869,7 +5871,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04c23aebea22c8a75833ae08ed31ccc020835b12a41999e58c31464271b94a88"
 dependencies = [
  "leb128",
- "wasmparser 0.216.0",
+ "wasmparser",
 ]
 
 [[package]]
@@ -5885,16 +5887,7 @@ dependencies = [
  "serde_json",
  "spdx",
  "wasm-encoder",
- "wasmparser 0.216.0",
-]
-
-[[package]]
-name = "wasmparser"
-version = "0.215.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53fbde0881f24199b81cf49b6ff8f9c145ac8eb1b7fc439adb5c099734f7d90e"
-dependencies = [
- "bitflags 2.6.0",
+ "wasmparser",
 ]
 
 [[package]]
@@ -6228,7 +6221,7 @@ dependencies = [
  "serde_json",
  "wasm-encoder",
  "wasm-metadata",
- "wasmparser 0.216.0",
+ "wasmparser",
  "wit-parser",
 ]
 
@@ -6247,7 +6240,7 @@ dependencies = [
  "serde_derive",
  "serde_json",
  "unicode-xid",
- "wasmparser 0.216.0",
+ "wasmparser",
 ]
 
 [[package]]

RELEASES.md

@@ -34,7 +34,6 @@ Compiler
   - [Add Tier 3 `std` Xtensa targets:](https://github.com/rust-lang/rust/pull/126380/) `xtensa-esp32-espidf`, `xtensa-esp32s2-espidf`, `xtensa-esp32s3-espidf`
   - [Add Tier 3 i686 Redox OS target:](https://github.com/rust-lang/rust/pull/126192/) `i686-unknown-redox`
   - [Promote `arm64ec-pc-windows-msvc` to Tier 2.](https://github.com/rust-lang/rust/pull/126039/)
-  - [Promote `wasm32-wasip2` to Tier 2.](https://github.com/rust-lang/rust/pull/126967/)
   - [Promote `loongarch64-unknown-linux-musl` to Tier 2 with host tools.](https://github.com/rust-lang/rust/pull/126298/)
   - [Enable full tools and profiler for LoongArch Linux targets.](https://github.com/rust-lang/rust/pull/127078/)
   - [Unconditionally warn on usage of `wasm32-wasi`.](https://github.com/rust-lang/rust/pull/126662/) (see compatibility note below)
@@ -100,6 +99,9 @@ Compatibility Notes
   The reason is that these types have different roles: `std::panic::PanicHookInfo` is the argument to the [panic hook](https://doc.rust-lang.org/stable/std/panic/fn.set_hook.html) in std context (where panics can have an arbitrary payload), while `core::panic::PanicInfo` is the argument to the [`#[panic_handler]`](https://doc.rust-lang.org/nomicon/panic-handler.html) in no_std context (where panics always carry a formatted *message*). Separating these types allows us to add more useful methods to these types, such as `std::panic::PanicHookInfo::payload_as_str()` and `core::panic::PanicInfo::message()`.
 
 * The new sort implementations may panic if a type's implementation of [`Ord`](https://doc.rust-lang.org/std/cmp/trait.Ord.html) (or the given comparison function) does not implement a [total order](https://en.wikipedia.org/wiki/Total_order) as the trait requires. `Ord`'s supertraits (`PartialOrd`, `Eq`, and `PartialEq`) must also be consistent. The previous implementations would not "notice" any problem, but the new implementations have a good chance of detecting inconsistencies, throwing a panic rather than returning knowingly unsorted data.
+* [In very rare cases, a change in the internal evaluation order of the trait
+  solver may result in new fatal overflow errors.](https://github.com/rust-lang/rust/pull/126128)
+
 
 <a id="1.81.0-Internal-Changes"></a>
 
@@ -112,6 +114,14 @@ tools.
 
 - [Add a Rust-for Linux `auto` CI job to check kernel builds.](https://github.com/rust-lang/rust/pull/125209/)
 
+Version 1.80.1 (2024-08-08)
+===========================
+
+<a id="1.80.1"></a>
+
+- [Fix miscompilation in the jump threading MIR optimization when comparing floats](https://github.com/rust-lang/rust/pull/128271)
+- [Revert changes to the `dead_code` lint from 1.80.0](https://github.com/rust-lang/rust/pull/128618)
+
 Version 1.80.0 (2024-07-25)
 ==========================
 

compiler/rustc/Cargo.toml

@@ -30,5 +30,6 @@ features = ['unprefixed_malloc_on_supported_platforms']
 jemalloc = ['dep:jemalloc-sys']
 llvm = ['rustc_driver_impl/llvm']
 max_level_info = ['rustc_driver_impl/max_level_info']
+rustc_randomized_layouts = ['rustc_driver_impl/rustc_randomized_layouts']
 rustc_use_parallel_compiler = ['rustc_driver_impl/rustc_use_parallel_compiler']
 # tidy-alphabetical-end

compiler/rustc_abi/src/layout.rs

@@ -968,8 +968,8 @@ fn univariant<
     let mut align = if pack.is_some() { dl.i8_align } else { dl.aggregate_align };
     let mut max_repr_align = repr.align;
     let mut inverse_memory_index: IndexVec<u32, FieldIdx> = fields.indices().collect();
-    let optimize = !repr.inhibit_struct_field_reordering();
-    if optimize && fields.len() > 1 {
+    let optimize_field_order = !repr.inhibit_struct_field_reordering();
+    if optimize_field_order && fields.len() > 1 {
         let end = if let StructKind::MaybeUnsized = kind { fields.len() - 1 } else { fields.len() };
         let optimizing = &mut inverse_memory_index.raw[..end];
         let fields_excluding_tail = &fields.raw[..end];
@@ -1176,7 +1176,7 @@ fn univariant<
     // If field 5 has offset 0, offsets[0] is 5, and memory_index[5] should be 0.
     // Field 5 would be the first element, so memory_index is i:
     // Note: if we didn't optimize, it's already right.
-    let memory_index = if optimize {
+    let memory_index = if optimize_field_order {
         inverse_memory_index.invert_bijective_mapping()
     } else {
         debug_assert!(inverse_memory_index.iter().copied().eq(fields.indices()));
@@ -1189,6 +1189,9 @@ fn univariant<
     }
     let mut layout_of_single_non_zst_field = None;
     let mut abi = Abi::Aggregate { sized };
+
+    let optimize_abi = !repr.inhibit_newtype_abi_optimization();
+
     // Try to make this a Scalar/ScalarPair.
     if sized && size.bytes() > 0 {
         // We skip *all* ZST here and later check if we are good in terms of alignment.
@@ -1205,7 +1208,7 @@ fn univariant<
                     match field.abi {
                         // For plain scalars, or vectors of them, we can't unpack
                         // newtypes for `#[repr(C)]`, as that affects C ABIs.
-                        Abi::Scalar(_) | Abi::Vector { .. } if optimize => {
+                        Abi::Scalar(_) | Abi::Vector { .. } if optimize_abi => {
                             abi = field.abi;
                         }
                         // But scalar pairs are Rust-specific and get

compiler/rustc_abi/src/lib.rs

@@ -43,14 +43,17 @@ bitflags! {
         const IS_SIMD            = 1 << 1;
         const IS_TRANSPARENT     = 1 << 2;
         // Internal only for now. If true, don't reorder fields.
+        // On its own it does not prevent ABI optimizations.
         const IS_LINEAR          = 1 << 3;
-        // If true, the type's layout can be randomized using
-        // the seed stored in `ReprOptions.field_shuffle_seed`
+        // If true, the type's crate has opted into layout randomization.
+        // Other flags can still inhibit reordering and thus randomization.
+        // The seed stored in `ReprOptions.field_shuffle_seed`.
         const RANDOMIZE_LAYOUT   = 1 << 4;
         // Any of these flags being set prevent field reordering optimisation.
-        const IS_UNOPTIMISABLE   = ReprFlags::IS_C.bits()
+        const FIELD_ORDER_UNOPTIMIZABLE   = ReprFlags::IS_C.bits()
                                  | ReprFlags::IS_SIMD.bits()
                                  | ReprFlags::IS_LINEAR.bits();
+        const ABI_UNOPTIMIZABLE = ReprFlags::IS_C.bits() | ReprFlags::IS_SIMD.bits();
     }
 }
 
@@ -139,10 +142,14 @@ impl ReprOptions {
         self.c() || self.int.is_some()
     }
 
+    pub fn inhibit_newtype_abi_optimization(&self) -> bool {
+        self.flags.intersects(ReprFlags::ABI_UNOPTIMIZABLE)
+    }
+
     /// Returns `true` if this `#[repr()]` guarantees a fixed field order,
     /// e.g. `repr(C)` or `repr(<int>)`.
     pub fn inhibit_struct_field_reordering(&self) -> bool {
-        self.flags.intersects(ReprFlags::IS_UNOPTIMISABLE) || self.int.is_some()
+        self.flags.intersects(ReprFlags::FIELD_ORDER_UNOPTIMIZABLE) || self.int.is_some()
     }
 
     /// Returns `true` if this type is valid for reordering and `-Z randomize-layout`

compiler/rustc_ast/src/mut_visit.rs

@@ -752,7 +752,7 @@ fn visit_lazy_tts<T: MutVisitor>(vis: &mut T, lazy_tts: &mut Option<LazyAttrToke
 pub fn visit_token<T: MutVisitor>(vis: &mut T, t: &mut Token) {
     let Token { kind, span } = t;
     match kind {
-        token::Ident(name, _ /*raw*/) | token::Lifetime(name) => {
+        token::Ident(name, _is_raw) | token::Lifetime(name, _is_raw) => {
             let mut ident = Ident::new(*name, *span);
             vis.visit_ident(&mut ident);
             *name = ident.name;
@@ -762,7 +762,7 @@ pub fn visit_token<T: MutVisitor>(vis: &mut T, t: &mut Token) {
         token::NtIdent(ident, _is_raw) => {
             vis.visit_ident(ident);
         }
-        token::NtLifetime(ident) => {
+        token::NtLifetime(ident, _is_raw) => {
             vis.visit_ident(ident);
         }
         token::Interpolated(nt) => {

compiler/rustc_ast/src/token.rs

@@ -331,11 +331,11 @@ pub enum TokenKind {
     /// Do not forget about `NtLifetime` when you want to match on lifetime identifiers.
     /// It's recommended to use `Token::(lifetime,uninterpolate,uninterpolated_span)` to
     /// treat regular and interpolated lifetime identifiers in the same way.
-    Lifetime(Symbol),
+    Lifetime(Symbol, IdentIsRaw),
     /// This identifier (and its span) is the lifetime passed to the
     /// declarative macro. The span in the surrounding `Token` is the span of
     /// the `lifetime` metavariable in the macro's RHS.
-    NtLifetime(Ident),
+    NtLifetime(Ident, IdentIsRaw),
 
     /// An embedded AST node, as produced by a macro. This only exists for
     /// historical reasons. We'd like to get rid of it, for multiple reasons.
@@ -458,7 +458,7 @@ impl Token {
     /// if they keep spans or perform edition checks.
     pub fn uninterpolated_span(&self) -> Span {
         match self.kind {
-            NtIdent(ident, _) | NtLifetime(ident) => ident.span,
+            NtIdent(ident, _) | NtLifetime(ident, _) => ident.span,
             Interpolated(ref nt) => nt.use_span(),
             _ => self.span,
         }
@@ -661,7 +661,9 @@ impl Token {
     pub fn uninterpolate(&self) -> Cow<'_, Token> {
         match self.kind {
             NtIdent(ident, is_raw) => Cow::Owned(Token::new(Ident(ident.name, is_raw), ident.span)),
-            NtLifetime(ident) => Cow::Owned(Token::new(Lifetime(ident.name), ident.span)),
+            NtLifetime(ident, is_raw) => {
+                Cow::Owned(Token::new(Lifetime(ident.name, is_raw), ident.span))
+            }
             _ => Cow::Borrowed(self),
         }
     }
@@ -679,11 +681,11 @@ impl Token {
 
     /// Returns a lifetime identifier if this token is a lifetime.
     #[inline]
-    pub fn lifetime(&self) -> Option<Ident> {
+    pub fn lifetime(&self) -> Option<(Ident, IdentIsRaw)> {
         // We avoid using `Token::uninterpolate` here because it's slow.
         match self.kind {
-            Lifetime(name) => Some(Ident::new(name, self.span)),
-            NtLifetime(ident) => Some(ident),
+            Lifetime(name, is_raw) => Some((Ident::new(name, self.span), is_raw)),
+            NtLifetime(ident, is_raw) => Some((ident, is_raw)),
             _ => None,
         }
     }
@@ -865,7 +867,7 @@ impl Token {
                 _ => return None,
             },
             SingleQuote => match joint.kind {
-                Ident(name, IdentIsRaw::No) => Lifetime(Symbol::intern(&format!("'{name}"))),
+                Ident(name, is_raw) => Lifetime(Symbol::intern(&format!("'{name}")), is_raw),
                 _ => return None,
             },
 

compiler/rustc_ast/src/tokenstream.rs

@@ -482,11 +482,11 @@ impl TokenStream {
             token::NtIdent(ident, is_raw) => {
                 TokenTree::Token(Token::new(token::Ident(ident.name, is_raw), ident.span), spacing)
             }
-            token::NtLifetime(ident) => TokenTree::Delimited(
+            token::NtLifetime(ident, is_raw) => TokenTree::Delimited(
                 DelimSpan::from_single(token.span),
                 DelimSpacing::new(Spacing::JointHidden, spacing),
                 Delimiter::Invisible,
-                TokenStream::token_alone(token::Lifetime(ident.name), ident.span),
+                TokenStream::token_alone(token::Lifetime(ident.name, is_raw), ident.span),
             ),
             token::Interpolated(ref nt) => TokenTree::Delimited(
                 DelimSpan::from_single(token.span),

compiler/rustc_ast_lowering/src/delegation.rs

@@ -72,7 +72,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
     fn has_self(&self, def_id: DefId, span: Span) -> bool {
         if let Some(local_sig_id) = def_id.as_local() {
             // The value may be missing due to recursive delegation.
-            // Error will be emmited later during HIR ty lowering.
+            // Error will be emitted later during HIR ty lowering.
             self.resolver.delegation_fn_sigs.get(&local_sig_id).map_or(false, |sig| sig.has_self)
         } else {
             match self.tcx.def_kind(def_id) {
@@ -139,7 +139,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
     fn param_count(&self, sig_id: DefId) -> (usize, bool /*c_variadic*/) {
         if let Some(local_sig_id) = sig_id.as_local() {
             // Map may be filled incorrectly due to recursive delegation.
-            // Error will be emmited later during HIR ty lowering.
+            // Error will be emitted later during HIR ty lowering.
             match self.resolver.delegation_fn_sigs.get(&local_sig_id) {
                 Some(sig) => (sig.param_count, sig.c_variadic),
                 None => (0, false),