Rollup of 8 pull requests

compiler/rustc_hir_analysis/src/hir_ty_lowering/errors.rs

@@ -9,6 +9,7 @@ use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::def_id::DefId;
 use rustc_middle::bug;
+use rustc_middle::ty::fast_reject::{TreatParams, simplify_type};
 use rustc_middle::ty::print::{PrintPolyTraitRefExt as _, PrintTraitRefExt as _};
 use rustc_middle::ty::{
     self, AdtDef, GenericParamDefKind, Ty, TyCtxt, TypeVisitableExt,
@@ -998,12 +999,19 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                     )),
                 ..
             }) = node
-            && let Some(adt_def) = qself_ty.ty_adt_def()
-            && let [inherent_impl] = tcx.inherent_impls(adt_def.did())
-            && let name = format!("{ident2}_{ident3}")
-            && let Some(ty::AssocItem { kind: ty::AssocKind::Fn, .. }) = tcx
-                .associated_items(inherent_impl)
-                .filter_by_name_unhygienic(Symbol::intern(&name))
+            && let Some(inherent_impls) = qself_ty
+                .ty_adt_def()
+                .map(|adt_def| tcx.inherent_impls(adt_def.did()))
+                .or_else(|| {
+                    simplify_type(tcx, qself_ty, TreatParams::InstantiateWithInfer)
+                        .map(|simple_ty| tcx.incoherent_impls(simple_ty))
+                })
+            && let name = Symbol::intern(&format!("{ident2}_{ident3}"))
+            && let Some(ty::AssocItem { kind: ty::AssocKind::Fn, .. }) = inherent_impls
+                .iter()
+                .flat_map(|inherent_impl| {
+                    tcx.associated_items(inherent_impl).filter_by_name_unhygienic(name)
+                })
                 .next()
         {
             Err(struct_span_code_err!(self.dcx(), span, E0223, "ambiguous associated type")

compiler/rustc_target/src/spec/mod.rs

@@ -1853,6 +1853,8 @@ supported_targets! {
 
     ("armv7a-none-eabi", armv7a_none_eabi),
     ("armv7a-none-eabihf", armv7a_none_eabihf),
+    ("armv7a-nuttx-eabi", armv7a_nuttx_eabi),
+    ("armv7a-nuttx-eabihf", armv7a_nuttx_eabihf),
 
     ("msp430-none-elf", msp430_none_elf),
 
@@ -1896,6 +1898,7 @@ supported_targets! {
 
     ("aarch64-unknown-none", aarch64_unknown_none),
     ("aarch64-unknown-none-softfloat", aarch64_unknown_none_softfloat),
+    ("aarch64-unknown-nuttx", aarch64_unknown_nuttx),
 
     ("x86_64-fortanix-unknown-sgx", x86_64_fortanix_unknown_sgx),
 
@@ -1971,6 +1974,8 @@ supported_targets! {
     ("x86_64-unknown-linux-none", x86_64_unknown_linux_none),
 
     ("thumbv6m-nuttx-eabi", thumbv6m_nuttx_eabi),
+    ("thumbv7a-nuttx-eabi", thumbv7a_nuttx_eabi),
+    ("thumbv7a-nuttx-eabihf", thumbv7a_nuttx_eabihf),
     ("thumbv7m-nuttx-eabi", thumbv7m_nuttx_eabi),
     ("thumbv7em-nuttx-eabi", thumbv7em_nuttx_eabi),
     ("thumbv7em-nuttx-eabihf", thumbv7em_nuttx_eabihf),

compiler/rustc_target/src/spec/targets/aarch64_unknown_nuttx.rs

@@ -0,0 +1,46 @@
+// Generic AArch64 target for NuttX OS
+//
+// Can be used in conjunction with the `target-feature` and
+// `target-cpu` compiler flags to opt-in more hardware-specific
+// features.
+//
+// For example, `-C target-cpu=cortex-a53`.
+
+use crate::spec::{
+    Cc, LinkerFlavor, Lld, PanicStrategy, RelocModel, SanitizerSet, StackProbeType, Target,
+    TargetOptions, cvs,
+};
+
+pub(crate) fn target() -> Target {
+    let opts = TargetOptions {
+        linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::Yes),
+        linker: Some("rust-lld".into()),
+        // Enable the Cortex-A53 errata 843419 mitigation by default
+        pre_link_args: TargetOptions::link_args(LinkerFlavor::Gnu(Cc::No, Lld::No), &[
+            "--fix-cortex-a53-843419",
+        ]),
+        features: "+v8a,+strict-align,+neon,+fp-armv8".into(),
+        supported_sanitizers: SanitizerSet::KCFI | SanitizerSet::KERNELADDRESS,
+        relocation_model: RelocModel::Static,
+        disable_redzone: true,
+        max_atomic_width: Some(128),
+        stack_probes: StackProbeType::Inline,
+        panic_strategy: PanicStrategy::Abort,
+        families: cvs!["unix"],
+        os: "nuttx".into(),
+        ..Default::default()
+    };
+    Target {
+        llvm_target: "aarch64-unknown-none".into(),
+        metadata: crate::spec::TargetMetadata {
+            description: Some("AArch64 NuttX".into()),
+            tier: Some(3),
+            host_tools: Some(false),
+            std: Some(false),
+        },
+        pointer_width: 64,
+        data_layout: "e-m:e-p270:32:32-p271:32:32-p272:64:64-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32".into(),
+        arch: "aarch64".into(),
+        options: opts,
+    }
+}

compiler/rustc_target/src/spec/targets/armv7a_nuttx_eabi.rs

@@ -0,0 +1,41 @@
+// Targets Cortex-A7/A8/A9 processors (ARMv7-A) running NuttX
+//
+// This target assumes that the device does NOT have a FPU (Floating Point Unit)
+// and will use software floating point operations. This matches the NuttX EABI
+// configuration without hardware floating point support.
+
+use crate::spec::{
+    Cc, FloatAbi, LinkerFlavor, Lld, PanicStrategy, RelocModel, Target, TargetOptions, cvs,
+};
+
+pub(crate) fn target() -> Target {
+    let opts = TargetOptions {
+        abi: "eabi".into(),
+        llvm_floatabi: Some(FloatAbi::Soft),
+        linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::Yes),
+        linker: Some("rust-lld".into()),
+        features: "+v7,+thumb2,+soft-float,-neon,+strict-align".into(),
+        relocation_model: RelocModel::Static,
+        disable_redzone: true,
+        max_atomic_width: Some(64),
+        panic_strategy: PanicStrategy::Abort,
+        emit_debug_gdb_scripts: false,
+        c_enum_min_bits: Some(8),
+        families: cvs!["unix"],
+        os: "nuttx".into(),
+        ..Default::default()
+    };
+    Target {
+        llvm_target: "armv7a-none-eabi".into(),
+        metadata: crate::spec::TargetMetadata {
+            description: Some("ARMv7-A Cortex-A with NuttX".into()),
+            tier: Some(3),
+            host_tools: Some(false),
+            std: Some(false),
+        },
+        pointer_width: 32,
+        data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
+        arch: "arm".into(),
+        options: opts,
+    }
+}

compiler/rustc_target/src/spec/targets/armv7a_nuttx_eabihf.rs

@@ -0,0 +1,41 @@
+// Targets Cortex-A7/A8/A9 processors (ARMv7-A) running NuttX with hardware floating point
+//
+// This target assumes that the device has a FPU (Floating Point Unit)
+// and will use hardware floating point operations. This matches the NuttX EABI
+// configuration with hardware floating point support.
+
+use crate::spec::{
+    Cc, FloatAbi, LinkerFlavor, Lld, PanicStrategy, RelocModel, Target, TargetOptions, cvs,
+};
+
+pub(crate) fn target() -> Target {
+    let opts = TargetOptions {
+        abi: "eabihf".into(),
+        llvm_floatabi: Some(FloatAbi::Hard),
+        linker_flavor: LinkerFlavor::Gnu(Cc::No, Lld::Yes),
+        linker: Some("rust-lld".into()),
+        features: "+v7,+thumb2,+vfp3,+neon,+strict-align".into(),
+        relocation_model: RelocModel::Static,
+        disable_redzone: true,
+        max_atomic_width: Some(64),
+        panic_strategy: PanicStrategy::Abort,
+        emit_debug_gdb_scripts: false,
+        c_enum_min_bits: Some(8),
+        families: cvs!["unix"],
+        os: "nuttx".into(),
+        ..Default::default()
+    };
+    Target {
+        llvm_target: "armv7a-none-eabihf".into(),
+        metadata: crate::spec::TargetMetadata {
+            description: Some("ARMv7-A Cortex-A with NuttX (hard float)".into()),
+            tier: Some(3),
+            host_tools: Some(false),
+            std: Some(false),
+        },
+        pointer_width: 32,
+        data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
+        arch: "arm".into(),
+        options: opts,
+    }
+}

compiler/rustc_target/src/spec/targets/thumbv7a_nuttx_eabi.rs

@@ -0,0 +1,33 @@
+// Targets Cortex-A7/A8/A9 processors (ARMv7-A)
+//
+// This target assumes that the device does NOT have a FPU (Floating Point Unit)
+// and will use software floating point operations. This matches the NuttX EABI
+// configuration without hardware floating point support.
+
+use crate::spec::{FloatAbi, Target, TargetOptions, base, cvs};
+
+pub(crate) fn target() -> Target {
+    Target {
+        llvm_target: "thumbv7a-none-eabi".into(),
+        metadata: crate::spec::TargetMetadata {
+            description: None,
+            tier: None,
+            host_tools: None,
+            std: None,
+        },
+        pointer_width: 32,
+        data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
+        arch: "arm".into(),
+
+        options: TargetOptions {
+            families: cvs!["unix"],
+            os: "nuttx".into(),
+            abi: "eabi".into(),
+            llvm_floatabi: Some(FloatAbi::Soft),
+            // Cortex-A7/A8/A9 with software floating point
+            features: "+soft-float,-neon".into(),
+            max_atomic_width: Some(64),
+            ..base::thumb::opts()
+        },
+    }
+}

compiler/rustc_target/src/spec/targets/thumbv7a_nuttx_eabihf.rs

@@ -0,0 +1,37 @@
+// Targets Cortex-A7/A8/A9 processors (ARMv7-A)
+//
+// This target assumes that the device has a FPU (Floating Point Unit) and lowers all (single
+// precision) floating point operations to hardware instructions. Cortex-A7/A8/A9 processors
+// support VFPv3-D32 or VFPv4-D32 floating point units with optional double-precision support.
+//
+// This target uses the "hard" floating convention (ABI) where floating point values
+// are passed to/from subroutines via FPU registers (S0, S1, D0, D1, etc.).
+
+use crate::spec::{FloatAbi, Target, TargetOptions, base, cvs};
+
+pub(crate) fn target() -> Target {
+    Target {
+        llvm_target: "thumbv7a-none-eabihf".into(),
+        metadata: crate::spec::TargetMetadata {
+            description: None,
+            tier: None,
+            host_tools: None,
+            std: None,
+        },
+        pointer_width: 32,
+        data_layout: "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64".into(),
+        arch: "arm".into(),
+
+        options: TargetOptions {
+            families: cvs!["unix"],
+            os: "nuttx".into(),
+            abi: "eabihf".into(),
+            llvm_floatabi: Some(FloatAbi::Hard),
+            // Cortex-A7/A8/A9 support VFPv3-D32/VFPv4-D32 with optional double-precision
+            // and NEON SIMD instructions
+            features: "+vfp3,+neon".into(),
+            max_atomic_width: Some(64),
+            ..base::thumb::opts()
+        },
+    }
+}

compiler/rustc_trait_selection/src/traits/query/dropck_outlives.rs

@@ -6,8 +6,7 @@ use rustc_span::{DUMMY_SP, Span};
 use tracing::{debug, instrument};
 
 use crate::traits::query::NoSolution;
-use crate::traits::query::normalize::QueryNormalizeExt;
-use crate::traits::{Normalized, ObligationCause, ObligationCtxt};
+use crate::traits::{ObligationCause, ObligationCtxt};
 
 /// This returns true if the type `ty` is "trivial" for
 /// dropck-outlives -- that is, if it doesn't require any types to
@@ -172,26 +171,31 @@ pub fn compute_dropck_outlives_inner<'tcx>(
         // do not themselves define a destructor", more or less. We have
         // to push them onto the stack to be expanded.
         for ty in constraints.dtorck_types.drain(..) {
-            let Normalized { value: ty, obligations } =
-                ocx.infcx.at(&cause, param_env).query_normalize(ty)?;
-            ocx.register_obligations(obligations);
+            let normalized_ty = ocx.normalize(&cause, param_env, ty);
 
-            debug!("dropck_outlives: ty from dtorck_types = {:?}", ty);
+            let errors = ocx.select_where_possible();
+            if !errors.is_empty() {
+                debug!("failed to normalize dtorck type: {ty} ~> {errors:#?}");
+                return Err(NoSolution);
+            }
+
+            let normalized_ty = ocx.infcx.resolve_vars_if_possible(normalized_ty);
+            debug!("dropck_outlives: ty from dtorck_types = {:?}", normalized_ty);
 
-            match ty.kind() {
+            match normalized_ty.kind() {
                 // All parameters live for the duration of the
                 // function.
                 ty::Param(..) => {}
 
                 // A projection that we couldn't resolve - it
                 // might have a destructor.
                 ty::Alias(..) => {
-                    result.kinds.push(ty.into());
+                    result.kinds.push(normalized_ty.into());
                 }
 
                 _ => {
-                    if ty_set.insert(ty) {
-                        ty_stack.push((ty, depth + 1));
+                    if ty_set.insert(normalized_ty) {
+                        ty_stack.push((normalized_ty, depth + 1));
                     }
                 }
             }

compiler/rustc_traits/src/type_op.rs

@@ -6,13 +6,12 @@ use rustc_middle::query::Providers;
 use rustc_middle::traits::query::NoSolution;
 use rustc_middle::ty::{Clause, FnSig, ParamEnvAnd, PolyFnSig, Ty, TyCtxt, TypeFoldable};
 use rustc_trait_selection::infer::InferCtxtBuilderExt;
-use rustc_trait_selection::traits::query::normalize::QueryNormalizeExt;
 use rustc_trait_selection::traits::query::type_op::ascribe_user_type::{
     AscribeUserType, type_op_ascribe_user_type_with_span,
 };
 use rustc_trait_selection::traits::query::type_op::normalize::Normalize;
 use rustc_trait_selection::traits::query::type_op::prove_predicate::ProvePredicate;
-use rustc_trait_selection::traits::{Normalized, Obligation, ObligationCause, ObligationCtxt};
+use rustc_trait_selection::traits::{Obligation, ObligationCause, ObligationCtxt};
 
 pub(crate) fn provide(p: &mut Providers) {
     *p = Providers {
@@ -43,10 +42,7 @@ where
     T: fmt::Debug + TypeFoldable<TyCtxt<'tcx>>,
 {
     let (param_env, Normalize { value }) = key.into_parts();
-    let Normalized { value, obligations } =
-        ocx.infcx.at(&ObligationCause::dummy(), param_env).query_normalize(value)?;
-    ocx.register_obligations(obligations);
-    Ok(value)
+    Ok(ocx.normalize(&ObligationCause::dummy(), param_env, value))
 }
 
 fn type_op_normalize_ty<'tcx>(

library/alloc/src/collections/vec_deque/mod.rs

@@ -1735,6 +1735,52 @@ impl<T, A: Allocator> VecDeque<T, A> {
         }
     }
 
+    /// Removes and returns the first element from the deque if the predicate
+    /// returns `true`, or [`None`] if the predicate returns false or the deque
+    /// is empty (the predicate will not be called in that case).
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(vec_deque_pop_if)]
+    /// use std::collections::VecDeque;
+    ///
+    /// let mut deque: VecDeque<i32> = vec![0, 1, 2, 3, 4].into();
+    /// let pred = |x: &mut i32| *x % 2 == 0;
+    ///
+    /// assert_eq!(deque.pop_front_if(pred), Some(0));
+    /// assert_eq!(deque, [1, 2, 3, 4]);
+    /// assert_eq!(deque.pop_front_if(pred), None);
+    /// ```
+    #[unstable(feature = "vec_deque_pop_if", issue = "135889")]
+    pub fn pop_front_if(&mut self, predicate: impl FnOnce(&mut T) -> bool) -> Option<T> {
+        let first = self.front_mut()?;
+        if predicate(first) { self.pop_front() } else { None }
+    }
+
+    /// Removes and returns the last element from the deque if the predicate
+    /// returns `true`, or [`None`] if the predicate returns false or the deque
+    /// is empty (the predicate will not be called in that case).
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(vec_deque_pop_if)]
+    /// use std::collections::VecDeque;
+    ///
+    /// let mut deque: VecDeque<i32> = vec![0, 1, 2, 3, 4].into();
+    /// let pred = |x: &mut i32| *x % 2 == 0;
+    ///
+    /// assert_eq!(deque.pop_back_if(pred), Some(4));
+    /// assert_eq!(deque, [0, 1, 2, 3]);
+    /// assert_eq!(deque.pop_back_if(pred), None);
+    /// ```
+    #[unstable(feature = "vec_deque_pop_if", issue = "135889")]
+    pub fn pop_back_if(&mut self, predicate: impl FnOnce(&mut T) -> bool) -> Option<T> {
+        let first = self.back_mut()?;
+        if predicate(first) { self.pop_back() } else { None }
+    }
+
     /// Prepends an element to the deque.
     ///
     /// # Examples