Auto merge of rust-lang#134195 - jieyouxu:rollup-xnaenjd, r=jieyouxu

Rollup of 13 pull requests

Successful merges:

 - rust-lang#122003 (link libunwind dynamically and allow controlling it via `crt-static` on gnullvm targets)
 - rust-lang#133122 (Add unpolished, experimental support for AFIDT (async fn in dyn trait))
 - rust-lang#133859 (Move some alloc tests to the alloctests crate)
 - rust-lang#134070 (Some asm! diagnostic adjustments and a papercut fix)
 - rust-lang#134095 ([CI] Use a lockfile for installing the `datadog` package)
 - rust-lang#134144 (Properly consider APITs for never type fallback ascription fix)
 - rust-lang#134152 (Simplify `rustc_mir_dataflow::abs_domain`.)
 - rust-lang#134154 (suppress field expr with generics error message if it's a method)
 - rust-lang#134155 (Forbid `unsafe_op_in_unsafe_fn` for Hurd)
 - rust-lang#134173 (allow `symbol_intern_string_literal` lint in test modules)
 - rust-lang#134178 (Stabilize the Rust 2024 prelude)
 - rust-lang#134179 (Remove outdated consteval note from `<*mut T>::align_offset` docs.)
 - rust-lang#134187 (Remove `PErr`.)

r? `@ghost`
`@rustbot` modify labels: rollup

.github/workflows/ci.yml

@@ -235,8 +235,9 @@ jobs:
           DATADOG_API_KEY: ${{ secrets.DATADOG_API_KEY }}
           DD_GITHUB_JOB_NAME: ${{ matrix.name }}
         run: |
-          npm install -g @datadog/datadog-ci@^2.x.x
-          python3 src/ci/scripts/upload-build-metrics.py build/cpu-usage.csv
+          cd src/ci
+          npm ci
+          python3 scripts/upload-build-metrics.py ../../build/cpu-usage.csv
 
   # This job isused to tell bors the final status of the build, as there is no practical way to detect
   # when a workflow is successful listening to webhooks only in our current bors implementation (homu).

compiler/rustc_ast/src/util/comments/tests.rs

@@ -1,3 +1,5 @@
+#![cfg_attr(not(bootstrap), allow(rustc::symbol_intern_string_literal))]
+
 use rustc_span::create_default_session_globals_then;
 
 use super::*;

compiler/rustc_errors/src/lib.rs

@@ -94,8 +94,7 @@ mod styled_buffer;
 mod tests;
 pub mod translation;
 
-pub type PErr<'a> = Diag<'a>;
-pub type PResult<'a, T> = Result<T, PErr<'a>>;
+pub type PResult<'a, T> = Result<T, Diag<'a>>;
 
 rustc_fluent_macro::fluent_messages! { "../messages.ftl" }
 
@@ -576,6 +575,10 @@ pub enum StashKey {
     UndeterminedMacroResolution,
     /// Used by `Parser::maybe_recover_trailing_expr`
     ExprInPat,
+    /// If in the parser we detect a field expr with turbofish generic params it's possible that
+    /// it's a method call without parens. If later on in `hir_typeck` we find out that this is
+    /// the case we suppress this message and we give a better suggestion.
+    GenericInFieldExpr,
 }
 
 fn default_track_diagnostic<R>(diag: DiagInner, f: &mut dyn FnMut(DiagInner) -> R) -> R {

compiler/rustc_feature/src/unstable.rs

@@ -390,6 +390,8 @@ declare_features! (
     (unstable, associated_type_defaults, "1.2.0", Some(29661)),
     /// Allows `async || body` closures.
     (unstable, async_closure, "1.37.0", Some(62290)),
+    /// Allows async functions to be called from `dyn Trait`.
+    (incomplete, async_fn_in_dyn_trait, "CURRENT_RUSTC_VERSION", Some(133119)),
     /// Allows `#[track_caller]` on async functions.
     (unstable, async_fn_track_caller, "1.73.0", Some(110011)),
     /// Allows `for await` loops.

compiler/rustc_hir/src/tests.rs

@@ -1,3 +1,5 @@
+#![cfg_attr(not(bootstrap), allow(rustc::symbol_intern_string_literal))]
+
 use rustc_data_structures::stable_hasher::Hash64;
 use rustc_span::def_id::{DefPathHash, StableCrateId};
 use rustc_span::edition::Edition;

compiler/rustc_hir_analysis/src/check/intrinsicck.rs

@@ -3,6 +3,7 @@ use std::assert_matches::debug_assert_matches;
 use rustc_abi::FieldIdx;
 use rustc_ast::InlineAsmTemplatePiece;
 use rustc_data_structures::fx::FxIndexSet;
+use rustc_hir::def_id::DefId;
 use rustc_hir::{self as hir, LangItem};
 use rustc_middle::bug;
 use rustc_middle::ty::{self, FloatTy, IntTy, Ty, TyCtxt, TypeVisitableExt, UintTy};
@@ -21,6 +22,12 @@ pub struct InlineAsmCtxt<'a, 'tcx> {
     get_operand_ty: Box<dyn Fn(&'tcx hir::Expr<'tcx>) -> Ty<'tcx> + 'a>,
 }
 
+enum NonAsmTypeReason<'tcx> {
+    UnevaluatedSIMDArrayLength(DefId, ty::Const<'tcx>),
+    Invalid(Ty<'tcx>),
+    InvalidElement(DefId, Ty<'tcx>),
+}
+
 impl<'a, 'tcx> InlineAsmCtxt<'a, 'tcx> {
     pub fn new_global_asm(tcx: TyCtxt<'tcx>) -> Self {
         InlineAsmCtxt {
@@ -56,7 +63,7 @@ impl<'a, 'tcx> InlineAsmCtxt<'a, 'tcx> {
         false
     }
 
-    fn get_asm_ty(&self, ty: Ty<'tcx>) -> Option<InlineAsmType> {
+    fn get_asm_ty(&self, ty: Ty<'tcx>) -> Result<InlineAsmType, NonAsmTypeReason<'tcx>> {
         let asm_ty_isize = match self.tcx.sess.target.pointer_width {
             16 => InlineAsmType::I16,
             32 => InlineAsmType::I32,
@@ -65,64 +72,62 @@ impl<'a, 'tcx> InlineAsmCtxt<'a, 'tcx> {
         };
 
         match *ty.kind() {
-            ty::Int(IntTy::I8) | ty::Uint(UintTy::U8) => Some(InlineAsmType::I8),
-            ty::Int(IntTy::I16) | ty::Uint(UintTy::U16) => Some(InlineAsmType::I16),
-            ty::Int(IntTy::I32) | ty::Uint(UintTy::U32) => Some(InlineAsmType::I32),
-            ty::Int(IntTy::I64) | ty::Uint(UintTy::U64) => Some(InlineAsmType::I64),
-            ty::Int(IntTy::I128) | ty::Uint(UintTy::U128) => Some(InlineAsmType::I128),
-            ty::Int(IntTy::Isize) | ty::Uint(UintTy::Usize) => Some(asm_ty_isize),
-            ty::Float(FloatTy::F16) => Some(InlineAsmType::F16),
-            ty::Float(FloatTy::F32) => Some(InlineAsmType::F32),
-            ty::Float(FloatTy::F64) => Some(InlineAsmType::F64),
-            ty::Float(FloatTy::F128) => Some(InlineAsmType::F128),
-            ty::FnPtr(..) => Some(asm_ty_isize),
-            ty::RawPtr(ty, _) if self.is_thin_ptr_ty(ty) => Some(asm_ty_isize),
+            ty::Int(IntTy::I8) | ty::Uint(UintTy::U8) => Ok(InlineAsmType::I8),
+            ty::Int(IntTy::I16) | ty::Uint(UintTy::U16) => Ok(InlineAsmType::I16),
+            ty::Int(IntTy::I32) | ty::Uint(UintTy::U32) => Ok(InlineAsmType::I32),
+            ty::Int(IntTy::I64) | ty::Uint(UintTy::U64) => Ok(InlineAsmType::I64),
+            ty::Int(IntTy::I128) | ty::Uint(UintTy::U128) => Ok(InlineAsmType::I128),
+            ty::Int(IntTy::Isize) | ty::Uint(UintTy::Usize) => Ok(asm_ty_isize),
+            ty::Float(FloatTy::F16) => Ok(InlineAsmType::F16),
+            ty::Float(FloatTy::F32) => Ok(InlineAsmType::F32),
+            ty::Float(FloatTy::F64) => Ok(InlineAsmType::F64),
+            ty::Float(FloatTy::F128) => Ok(InlineAsmType::F128),
+            ty::FnPtr(..) => Ok(asm_ty_isize),
+            ty::RawPtr(ty, _) if self.is_thin_ptr_ty(ty) => Ok(asm_ty_isize),
             ty::Adt(adt, args) if adt.repr().simd() => {
                 let fields = &adt.non_enum_variant().fields;
-                let elem_ty = fields[FieldIdx::ZERO].ty(self.tcx, args);
+                let field = &fields[FieldIdx::ZERO];
+                let elem_ty = field.ty(self.tcx, args);
 
                 let (size, ty) = match elem_ty.kind() {
                     ty::Array(ty, len) => {
+                        let len = self.tcx.normalize_erasing_regions(self.typing_env, *len);
                         if let Some(len) = len.try_to_target_usize(self.tcx) {
                             (len, *ty)
                         } else {
-                            return None;
+                            return Err(NonAsmTypeReason::UnevaluatedSIMDArrayLength(
+                                field.did, len,
+                            ));
                         }
                     }
                     _ => (fields.len() as u64, elem_ty),
                 };
 
                 match ty.kind() {
-                    ty::Int(IntTy::I8) | ty::Uint(UintTy::U8) => Some(InlineAsmType::VecI8(size)),
-                    ty::Int(IntTy::I16) | ty::Uint(UintTy::U16) => {
-                        Some(InlineAsmType::VecI16(size))
-                    }
-                    ty::Int(IntTy::I32) | ty::Uint(UintTy::U32) => {
-                        Some(InlineAsmType::VecI32(size))
-                    }
-                    ty::Int(IntTy::I64) | ty::Uint(UintTy::U64) => {
-                        Some(InlineAsmType::VecI64(size))
-                    }
+                    ty::Int(IntTy::I8) | ty::Uint(UintTy::U8) => Ok(InlineAsmType::VecI8(size)),
+                    ty::Int(IntTy::I16) | ty::Uint(UintTy::U16) => Ok(InlineAsmType::VecI16(size)),
+                    ty::Int(IntTy::I32) | ty::Uint(UintTy::U32) => Ok(InlineAsmType::VecI32(size)),
+                    ty::Int(IntTy::I64) | ty::Uint(UintTy::U64) => Ok(InlineAsmType::VecI64(size)),
                     ty::Int(IntTy::I128) | ty::Uint(UintTy::U128) => {
-                        Some(InlineAsmType::VecI128(size))
+                        Ok(InlineAsmType::VecI128(size))
                     }
                     ty::Int(IntTy::Isize) | ty::Uint(UintTy::Usize) => {
-                        Some(match self.tcx.sess.target.pointer_width {
+                        Ok(match self.tcx.sess.target.pointer_width {
                             16 => InlineAsmType::VecI16(size),
                             32 => InlineAsmType::VecI32(size),
                             64 => InlineAsmType::VecI64(size),
                             width => bug!("unsupported pointer width: {width}"),
                         })
                     }
-                    ty::Float(FloatTy::F16) => Some(InlineAsmType::VecF16(size)),
-                    ty::Float(FloatTy::F32) => Some(InlineAsmType::VecF32(size)),
-                    ty::Float(FloatTy::F64) => Some(InlineAsmType::VecF64(size)),
-                    ty::Float(FloatTy::F128) => Some(InlineAsmType::VecF128(size)),
-                    _ => None,
+                    ty::Float(FloatTy::F16) => Ok(InlineAsmType::VecF16(size)),
+                    ty::Float(FloatTy::F32) => Ok(InlineAsmType::VecF32(size)),
+                    ty::Float(FloatTy::F64) => Ok(InlineAsmType::VecF64(size)),
+                    ty::Float(FloatTy::F128) => Ok(InlineAsmType::VecF128(size)),
+                    _ => Err(NonAsmTypeReason::InvalidElement(field.did, ty)),
                 }
             }
             ty::Infer(_) => bug!("unexpected infer ty in asm operand"),
-            _ => None,
+            _ => Err(NonAsmTypeReason::Invalid(ty)),
         }
     }
 
@@ -163,17 +168,42 @@ impl<'a, 'tcx> InlineAsmCtxt<'a, 'tcx> {
             }
             _ => self.get_asm_ty(ty),
         };
-        let Some(asm_ty) = asm_ty else {
-            let msg = format!("cannot use value of type `{ty}` for inline assembly");
-            self.tcx
-                .dcx()
-                .struct_span_err(expr.span, msg)
-                .with_note(
-                    "only integers, floats, SIMD vectors, pointers and function pointers \
-                     can be used as arguments for inline assembly",
-                )
-                .emit();
-            return None;
+        let asm_ty = match asm_ty {
+            Ok(asm_ty) => asm_ty,
+            Err(reason) => {
+                match reason {
+                    NonAsmTypeReason::UnevaluatedSIMDArrayLength(did, len) => {
+                        let msg = format!("cannot evaluate SIMD vector length `{len}`");
+                        self.tcx
+                            .dcx()
+                            .struct_span_err(self.tcx.def_span(did), msg)
+                            .with_span_note(
+                                expr.span,
+                                "SIMD vector length needs to be known statically for use in `asm!`",
+                            )
+                            .emit();
+                    }
+                    NonAsmTypeReason::Invalid(ty) => {
+                        let msg = format!("cannot use value of type `{ty}` for inline assembly");
+                        self.tcx.dcx().struct_span_err(expr.span, msg).with_note(
+                            "only integers, floats, SIMD vectors, pointers and function pointers \
+                            can be used as arguments for inline assembly",
+                        ).emit();
+                    }
+                    NonAsmTypeReason::InvalidElement(did, ty) => {
+                        let msg = format!(
+                            "cannot use SIMD vector with element type `{ty}` for inline assembly"
+                        );
+                        self.tcx.dcx()
+                        .struct_span_err(self.tcx.def_span(did), msg).with_span_note(
+                            expr.span,
+                            "only integers, floats, SIMD vectors, pointers and function pointers \
+                            can be used as arguments for inline assembly",
+                        ).emit();
+                    }
+                }
+                return None;
+            }
         };
 
         // Check that the type implements Copy. The only case where this can

compiler/rustc_hir_typeck/src/expr.rs

@@ -3076,7 +3076,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             err.help("methods are immutable and cannot be assigned to");
         }
 
-        err.emit()
+        // See `StashKey::GenericInFieldExpr` for more info
+        self.dcx().try_steal_replace_and_emit_err(field.span, StashKey::GenericInFieldExpr, err)
     }
 
     fn point_at_param_definition(&self, err: &mut Diag<'_>, param: ty::ParamTy) {

compiler/rustc_hir_typeck/src/fallback.rs

@@ -613,19 +613,16 @@ impl<'tcx> AnnotateUnitFallbackVisitor<'_, 'tcx> {
         if arg_segment.args.is_none()
             && let Some(all_args) = self.fcx.typeck_results.borrow().node_args_opt(id)
             && let generics = self.fcx.tcx.generics_of(def_id)
-            && let args = &all_args[generics.parent_count..]
+            && let args = all_args[generics.parent_count..].iter().zip(&generics.own_params)
             // We can't turbofish consts :(
-            && args.iter().all(|arg| matches!(arg.unpack(), ty::GenericArgKind::Type(_) | ty::GenericArgKind::Lifetime(_)))
+            && args.clone().all(|(_, param)| matches!(param.kind, ty::GenericParamDefKind::Type { .. } | ty::GenericParamDefKind::Lifetime))
         {
-            let n_tys = args
-                .iter()
-                .filter(|arg| matches!(arg.unpack(), ty::GenericArgKind::Type(_)))
-                .count();
-            for (idx, arg) in args
-                .iter()
-                .filter(|arg| matches!(arg.unpack(), ty::GenericArgKind::Type(_)))
-                .enumerate()
-            {
+            // We filter out APITs, which are not turbofished.
+            let non_apit_type_args = args.filter(|(_, param)| {
+                matches!(param.kind, ty::GenericParamDefKind::Type { synthetic: false, .. })
+            });
+            let n_tys = non_apit_type_args.clone().count();
+            for (idx, (arg, _)) in non_apit_type_args.enumerate() {
                 if let Some(ty) = arg.as_type()
                     && let Some(vid) = self.fcx.root_vid(ty)
                     && self.reachable_vids.contains(&vid)

compiler/rustc_lint/src/tests.rs

@@ -1,3 +1,5 @@
+#![cfg_attr(not(bootstrap), allow(rustc::symbol_intern_string_literal))]
+
 use rustc_span::{Symbol, create_default_session_globals_then};
 
 use crate::levels::parse_lint_and_tool_name;

compiler/rustc_middle/src/ty/instance.rs

@@ -677,23 +677,26 @@ impl<'tcx> Instance<'tcx> {
                 //
                 // 1) The underlying method expects a caller location parameter
                 // in the ABI
-                if resolved.def.requires_caller_location(tcx)
-                        // 2) The caller location parameter comes from having `#[track_caller]`
-                        // on the implementation, and *not* on the trait method.
-                        && !tcx.should_inherit_track_caller(def)
-                        // If the method implementation comes from the trait definition itself
-                        // (e.g. `trait Foo { #[track_caller] my_fn() { /* impl */ } }`),
-                        // then we don't need to generate a shim. This check is needed because
-                        // `should_inherit_track_caller` returns `false` if our method
-                        // implementation comes from the trait block, and not an impl block
-                        && !matches!(
-                            tcx.opt_associated_item(def),
-                            Some(ty::AssocItem {
-                                container: ty::AssocItemContainer::Trait,
-                                ..
-                            })
-                        )
-                {
+                let needs_track_caller_shim = resolved.def.requires_caller_location(tcx)
+                    // 2) The caller location parameter comes from having `#[track_caller]`
+                    // on the implementation, and *not* on the trait method.
+                    && !tcx.should_inherit_track_caller(def)
+                    // If the method implementation comes from the trait definition itself
+                    // (e.g. `trait Foo { #[track_caller] my_fn() { /* impl */ } }`),
+                    // then we don't need to generate a shim. This check is needed because
+                    // `should_inherit_track_caller` returns `false` if our method
+                    // implementation comes from the trait block, and not an impl block
+                    && !matches!(
+                        tcx.opt_associated_item(def),
+                        Some(ty::AssocItem {
+                            container: ty::AssocItemContainer::Trait,
+                            ..
+                        })
+                    );
+                // We also need to generate a shim if this is an AFIT.
+                let needs_rpitit_shim =
+                    tcx.return_position_impl_trait_in_trait_shim_data(def).is_some();
+                if needs_track_caller_shim || needs_rpitit_shim {
                     if tcx.is_closure_like(def) {
                         debug!(
                             " => vtable fn pointer created for closure with #[track_caller]: {:?} for method {:?} {:?}",

compiler/rustc_middle/src/ty/mod.rs

@@ -146,6 +146,7 @@ mod opaque_types;
 mod parameterized;
 mod predicate;
 mod region;
+mod return_position_impl_trait_in_trait;
 mod rvalue_scopes;
 mod structural_impls;
 #[allow(hidden_glob_reexports)]