make `LayoutCx` not generic

compiler/rustc_const_eval/src/interpret/validity.rs

@@ -21,7 +21,7 @@ use rustc_middle::mir::interpret::{
     UnsupportedOpInfo, ValidationErrorInfo,
 };
 use rustc_middle::ty::layout::{LayoutCx, LayoutOf, TyAndLayout};
-use rustc_middle::ty::{self, Ty, TyCtxt};
+use rustc_middle::ty::{self, Ty};
 use rustc_span::symbol::{sym, Symbol};
 use rustc_target::abi::{
     Abi, FieldIdx, FieldsShape, Scalar as ScalarAbi, Size, VariantIdx, Variants, WrappingRange,
@@ -949,7 +949,7 @@ impl<'rt, 'tcx, M: Machine<'tcx>> ValidityVisitor<'rt, 'tcx, M> {
 
         /// Helper for recursive traversal: add data ranges of the given type to `out`.
         fn union_data_range_uncached<'tcx>(
-            cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+            cx: &LayoutCx<'tcx>,
             layout: TyAndLayout<'tcx>,
             base_offset: Size,
             out: &mut RangeSet,

compiler/rustc_const_eval/src/util/check_validity_requirement.rs

@@ -42,7 +42,7 @@ pub fn check_validity_requirement<'tcx>(
 /// for details.
 fn check_validity_requirement_strict<'tcx>(
     ty: TyAndLayout<'tcx>,
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     kind: ValidityRequirement,
 ) -> Result<bool, &'tcx LayoutError<'tcx>> {
     let machine = CompileTimeMachine::new(CanAccessMutGlobal::No, CheckAlignment::Error);
@@ -80,7 +80,7 @@ fn check_validity_requirement_strict<'tcx>(
 /// function for details.
 fn check_validity_requirement_lax<'tcx>(
     this: TyAndLayout<'tcx>,
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     init_kind: ValidityRequirement,
 ) -> Result<bool, &'tcx LayoutError<'tcx>> {
     let scalar_allows_raw_init = move |s: Scalar| -> bool {

compiler/rustc_middle/src/ty/layout.rs

@@ -286,12 +286,12 @@ impl<'tcx> IntoDiagArg for LayoutError<'tcx> {
 }
 
 #[derive(Clone, Copy)]
-pub struct LayoutCx<'tcx, C> {
-    pub tcx: C,
+pub struct LayoutCx<'tcx> {
+    pub tcx: TyCtxt<'tcx>,
     pub param_env: ty::ParamEnv<'tcx>,
 }
 
-impl<'tcx> LayoutCalculator for LayoutCx<'tcx, TyCtxt<'tcx>> {
+impl<'tcx> LayoutCalculator for LayoutCx<'tcx> {
     type TargetDataLayoutRef = &'tcx TargetDataLayout;
 
     fn delayed_bug(&self, txt: impl Into<Cow<'static, str>>) {
@@ -568,31 +568,31 @@ impl<'tcx> HasTyCtxt<'tcx> for TyCtxtAt<'tcx> {
     }
 }
 
-impl<'tcx, C> HasParamEnv<'tcx> for LayoutCx<'tcx, C> {
+impl<'tcx> HasParamEnv<'tcx> for LayoutCx<'tcx> {
     fn param_env(&self) -> ty::ParamEnv<'tcx> {
         self.param_env
     }
 }
 
-impl<'tcx, T: HasDataLayout> HasDataLayout for LayoutCx<'tcx, T> {
+impl<'tcx> HasDataLayout for LayoutCx<'tcx> {
     fn data_layout(&self) -> &TargetDataLayout {
         self.tcx.data_layout()
     }
 }
 
-impl<'tcx, T: HasTargetSpec> HasTargetSpec for LayoutCx<'tcx, T> {
+impl<'tcx> HasTargetSpec for LayoutCx<'tcx> {
     fn target_spec(&self) -> &Target {
         self.tcx.target_spec()
     }
 }
 
-impl<'tcx, T: HasWasmCAbiOpt> HasWasmCAbiOpt for LayoutCx<'tcx, T> {
+impl<'tcx> HasWasmCAbiOpt for LayoutCx<'tcx> {
     fn wasm_c_abi_opt(&self) -> WasmCAbi {
         self.tcx.wasm_c_abi_opt()
     }
 }
 
-impl<'tcx, T: HasTyCtxt<'tcx>> HasTyCtxt<'tcx> for LayoutCx<'tcx, T> {
+impl<'tcx> HasTyCtxt<'tcx> for LayoutCx<'tcx> {
     fn tcx(&self) -> TyCtxt<'tcx> {
         self.tcx.tcx()
     }
@@ -685,7 +685,7 @@ pub trait LayoutOf<'tcx>: LayoutOfHelpers<'tcx> {
 
 impl<'tcx, C: LayoutOfHelpers<'tcx>> LayoutOf<'tcx> for C {}
 
-impl<'tcx> LayoutOfHelpers<'tcx> for LayoutCx<'tcx, TyCtxt<'tcx>> {
+impl<'tcx> LayoutOfHelpers<'tcx> for LayoutCx<'tcx> {
     type LayoutOfResult = Result<TyAndLayout<'tcx>, &'tcx LayoutError<'tcx>>;
 
     #[inline]
@@ -699,25 +699,6 @@ impl<'tcx> LayoutOfHelpers<'tcx> for LayoutCx<'tcx, TyCtxt<'tcx>> {
     }
 }
 
-impl<'tcx> LayoutOfHelpers<'tcx> for LayoutCx<'tcx, TyCtxtAt<'tcx>> {
-    type LayoutOfResult = Result<TyAndLayout<'tcx>, &'tcx LayoutError<'tcx>>;
-
-    #[inline]
-    fn layout_tcx_at_span(&self) -> Span {
-        self.tcx.span
-    }
-
-    #[inline]
-    fn handle_layout_err(
-        &self,
-        err: LayoutError<'tcx>,
-        _: Span,
-        _: Ty<'tcx>,
-    ) -> &'tcx LayoutError<'tcx> {
-        self.tcx.arena.alloc(err)
-    }
-}
-
 impl<'tcx, C> TyAbiInterface<'tcx, C> for Ty<'tcx>
 where
     C: HasTyCtxt<'tcx> + HasParamEnv<'tcx>,

compiler/rustc_transmute/src/layout/mod.rs

@@ -64,7 +64,7 @@ pub mod rustc {
 
     use rustc_middle::mir::Mutability;
     use rustc_middle::ty::layout::{LayoutCx, LayoutError};
-    use rustc_middle::ty::{self, Ty, TyCtxt};
+    use rustc_middle::ty::{self, Ty};
     use rustc_target::abi::Layout;
 
     /// A reference in the layout.
@@ -124,7 +124,7 @@ pub mod rustc {
     }
 
     pub(crate) fn layout_of<'tcx>(
-        cx: LayoutCx<'tcx, TyCtxt<'tcx>>,
+        cx: LayoutCx<'tcx>,
         ty: Ty<'tcx>,
     ) -> Result<Layout<'tcx>, &'tcx LayoutError<'tcx>> {
         use rustc_middle::ty::layout::LayoutOf;

compiler/rustc_transmute/src/layout/tree.rs

@@ -204,7 +204,7 @@ pub(crate) mod rustc {
     }
 
     impl<'tcx> Tree<Def<'tcx>, Ref<'tcx>> {
-        pub(crate) fn from_ty(ty: Ty<'tcx>, cx: LayoutCx<'tcx, TyCtxt<'tcx>>) -> Result<Self, Err> {
+        pub(crate) fn from_ty(ty: Ty<'tcx>, cx: LayoutCx<'tcx>) -> Result<Self, Err> {
             use rustc_target::abi::HasDataLayout;
             let layout = layout_of(cx, ty)?;
 
@@ -274,7 +274,7 @@ pub(crate) mod rustc {
         fn from_tuple(
             (ty, layout): (Ty<'tcx>, Layout<'tcx>),
             members: &'tcx List<Ty<'tcx>>,
-            cx: LayoutCx<'tcx, TyCtxt<'tcx>>,
+            cx: LayoutCx<'tcx>,
         ) -> Result<Self, Err> {
             match &layout.fields {
                 FieldsShape::Primitive => {
@@ -299,7 +299,7 @@ pub(crate) mod rustc {
         fn from_struct(
             (ty, layout): (Ty<'tcx>, Layout<'tcx>),
             def: AdtDef<'tcx>,
-            cx: LayoutCx<'tcx, TyCtxt<'tcx>>,
+            cx: LayoutCx<'tcx>,
         ) -> Result<Self, Err> {
             assert!(def.is_struct());
             let def = Def::Adt(def);
@@ -314,7 +314,7 @@ pub(crate) mod rustc {
         fn from_enum(
             (ty, layout): (Ty<'tcx>, Layout<'tcx>),
             def: AdtDef<'tcx>,
-            cx: LayoutCx<'tcx, TyCtxt<'tcx>>,
+            cx: LayoutCx<'tcx>,
         ) -> Result<Self, Err> {
             assert!(def.is_enum());
 
@@ -389,7 +389,7 @@ pub(crate) mod rustc {
             tag: Option<(ScalarInt, VariantIdx, TagEncoding<VariantIdx>)>,
             (ty, layout): (Ty<'tcx>, Layout<'tcx>),
             total_size: Size,
-            cx: LayoutCx<'tcx, TyCtxt<'tcx>>,
+            cx: LayoutCx<'tcx>,
         ) -> Result<Self, Err> {
             // This constructor does not support non-`FieldsShape::Arbitrary`
             // layouts.
@@ -470,7 +470,7 @@ pub(crate) mod rustc {
         fn from_union(
             (ty, layout): (Ty<'tcx>, Layout<'tcx>),
             def: AdtDef<'tcx>,
-            cx: LayoutCx<'tcx, TyCtxt<'tcx>>,
+            cx: LayoutCx<'tcx>,
         ) -> Result<Self, Err> {
             assert!(def.is_union());
 
@@ -500,7 +500,7 @@ pub(crate) mod rustc {
     }
 
     fn ty_field<'tcx>(
-        cx: LayoutCx<'tcx, TyCtxt<'tcx>>,
+        cx: LayoutCx<'tcx>,
         (ty, layout): (Ty<'tcx>, Layout<'tcx>),
         i: FieldIdx,
     ) -> Ty<'tcx> {
@@ -527,7 +527,7 @@ pub(crate) mod rustc {
     }
 
     fn ty_variant<'tcx>(
-        cx: LayoutCx<'tcx, TyCtxt<'tcx>>,
+        cx: LayoutCx<'tcx>,
         (ty, layout): (Ty<'tcx>, Layout<'tcx>),
         i: VariantIdx,
     ) -> Layout<'tcx> {

compiler/rustc_ty_utils/src/abi.rs

@@ -358,7 +358,7 @@ fn fn_abi_of_instance<'tcx>(
 
 // Handle safe Rust thin and fat pointers.
 fn adjust_for_rust_scalar<'tcx>(
-    cx: LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: LayoutCx<'tcx>,
     attrs: &mut ArgAttributes,
     scalar: Scalar,
     layout: TyAndLayout<'tcx>,
@@ -448,12 +448,12 @@ fn adjust_for_rust_scalar<'tcx>(
 
 /// Ensure that the ABI makes basic sense.
 fn fn_abi_sanity_check<'tcx>(
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     fn_abi: &FnAbi<'tcx, Ty<'tcx>>,
     spec_abi: SpecAbi,
 ) {
     fn fn_arg_sanity_check<'tcx>(
-        cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+        cx: &LayoutCx<'tcx>,
         fn_abi: &FnAbi<'tcx, Ty<'tcx>>,
         spec_abi: SpecAbi,
         arg: &ArgAbi<'tcx, Ty<'tcx>>,
@@ -538,7 +538,7 @@ fn fn_abi_sanity_check<'tcx>(
 // arguments of this method, into a separate `struct`.
 #[tracing::instrument(level = "debug", skip(cx, caller_location, fn_def_id, force_thin_self_ptr))]
 fn fn_abi_new_uncached<'tcx>(
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     sig: ty::PolyFnSig<'tcx>,
     extra_args: &[Ty<'tcx>],
     caller_location: Option<Ty<'tcx>>,
@@ -643,7 +643,7 @@ fn fn_abi_new_uncached<'tcx>(
 
 #[tracing::instrument(level = "trace", skip(cx))]
 fn fn_abi_adjust_for_abi<'tcx>(
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     fn_abi: &mut FnAbi<'tcx, Ty<'tcx>>,
     abi: SpecAbi,
     fn_def_id: Option<DefId>,

compiler/rustc_ty_utils/src/layout.rs

@@ -79,15 +79,12 @@ fn layout_of<'tcx>(
     Ok(layout)
 }
 
-fn error<'tcx>(
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
-    err: LayoutError<'tcx>,
-) -> &'tcx LayoutError<'tcx> {
+fn error<'tcx>(cx: &LayoutCx<'tcx>, err: LayoutError<'tcx>) -> &'tcx LayoutError<'tcx> {
     cx.tcx.arena.alloc(err)
 }
 
 fn univariant_uninterned<'tcx>(
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     ty: Ty<'tcx>,
     fields: &IndexSlice<FieldIdx, Layout<'_>>,
     repr: &ReprOptions,
@@ -103,7 +100,7 @@ fn univariant_uninterned<'tcx>(
 }
 
 fn layout_of_uncached<'tcx>(
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     ty: Ty<'tcx>,
 ) -> Result<Layout<'tcx>, &'tcx LayoutError<'tcx>> {
     // Types that reference `ty::Error` pessimistically don't have a meaningful layout.
@@ -809,7 +806,7 @@ fn coroutine_saved_local_eligibility(
 
 /// Compute the full coroutine layout.
 fn coroutine_layout<'tcx>(
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     ty: Ty<'tcx>,
     def_id: hir::def_id::DefId,
     args: GenericArgsRef<'tcx>,
@@ -1017,7 +1014,7 @@ fn coroutine_layout<'tcx>(
     Ok(layout)
 }
 
-fn record_layout_for_printing<'tcx>(cx: &LayoutCx<'tcx, TyCtxt<'tcx>>, layout: TyAndLayout<'tcx>) {
+fn record_layout_for_printing<'tcx>(cx: &LayoutCx<'tcx>, layout: TyAndLayout<'tcx>) {
     // Ignore layouts that are done with non-empty environments or
     // non-monomorphic layouts, as the user only wants to see the stuff
     // resulting from the final codegen session.
@@ -1068,7 +1065,7 @@ fn record_layout_for_printing<'tcx>(cx: &LayoutCx<'tcx, TyCtxt<'tcx>>, layout: T
 }
 
 fn variant_info_for_adt<'tcx>(
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     layout: TyAndLayout<'tcx>,
     adt_def: AdtDef<'tcx>,
 ) -> (Vec<VariantInfo>, Option<Size>) {
@@ -1140,7 +1137,7 @@ fn variant_info_for_adt<'tcx>(
 }
 
 fn variant_info_for_coroutine<'tcx>(
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
+    cx: &LayoutCx<'tcx>,
     layout: TyAndLayout<'tcx>,
     def_id: DefId,
     args: ty::GenericArgsRef<'tcx>,

compiler/rustc_ty_utils/src/layout_sanity_check.rs

@@ -2,14 +2,10 @@ use std::assert_matches::assert_matches;
 
 use rustc_middle::bug;
 use rustc_middle::ty::layout::{LayoutCx, TyAndLayout};
-use rustc_middle::ty::TyCtxt;
 use rustc_target::abi::*;
 
 /// Enforce some basic invariants on layouts.
-pub(super) fn sanity_check_layout<'tcx>(
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
-    layout: &TyAndLayout<'tcx>,
-) {
+pub(super) fn sanity_check_layout<'tcx>(cx: &LayoutCx<'tcx>, layout: &TyAndLayout<'tcx>) {
     // Type-level uninhabitedness should always imply ABI uninhabitedness.
     if layout.ty.is_privately_uninhabited(cx.tcx, cx.param_env) {
         assert!(layout.abi.is_uninhabited());
@@ -28,8 +24,8 @@ pub(super) fn sanity_check_layout<'tcx>(
     }
 
     /// Yields non-ZST fields of the type
-    fn non_zst_fields<'a, 'tcx>(
-        cx: &'a LayoutCx<'tcx, TyCtxt<'tcx>>,
+    fn non_zst_fields<'tcx, 'a>(
+        cx: &'a LayoutCx<'tcx>,
         layout: &'a TyAndLayout<'tcx>,
     ) -> impl Iterator<Item = (Size, TyAndLayout<'tcx>)> + 'a {
         (0..layout.layout.fields().count()).filter_map(|i| {
@@ -43,10 +39,7 @@ pub(super) fn sanity_check_layout<'tcx>(
         })
     }
 
-    fn skip_newtypes<'tcx>(
-        cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
-        layout: &TyAndLayout<'tcx>,
-    ) -> TyAndLayout<'tcx> {
+    fn skip_newtypes<'tcx>(cx: &LayoutCx<'tcx>, layout: &TyAndLayout<'tcx>) -> TyAndLayout<'tcx> {
         if matches!(layout.layout.variants(), Variants::Multiple { .. }) {
             // Definitely not a newtype of anything.
             return *layout;
@@ -69,7 +62,7 @@ pub(super) fn sanity_check_layout<'tcx>(
         *layout
     }
 
-    fn check_layout_abi<'tcx>(cx: &LayoutCx<'tcx, TyCtxt<'tcx>>, layout: &TyAndLayout<'tcx>) {
+    fn check_layout_abi<'tcx>(cx: &LayoutCx<'tcx>, layout: &TyAndLayout<'tcx>) {
         // Verify the ABI mandated alignment and size.
         let align = layout.abi.inherent_align(cx).map(|align| align.abi);
         let size = layout.abi.inherent_size(cx);

src/tools/miri/src/machine.rs

@@ -381,7 +381,7 @@ pub struct PrimitiveLayouts<'tcx> {
 }
 
 impl<'tcx> PrimitiveLayouts<'tcx> {
-    fn new(layout_cx: LayoutCx<'tcx, TyCtxt<'tcx>>) -> Result<Self, &'tcx LayoutError<'tcx>> {
+    fn new(layout_cx: LayoutCx<'tcx>) -> Result<Self, &'tcx LayoutError<'tcx>> {
         let tcx = layout_cx.tcx;
         let mut_raw_ptr = Ty::new_mut_ptr(tcx, tcx.types.unit);
         let const_raw_ptr = Ty::new_imm_ptr(tcx, tcx.types.unit);
@@ -596,7 +596,7 @@ pub struct MiriMachine<'tcx> {
 }
 
 impl<'tcx> MiriMachine<'tcx> {
-    pub(crate) fn new(config: &MiriConfig, layout_cx: LayoutCx<'tcx, TyCtxt<'tcx>>) -> Self {
+    pub(crate) fn new(config: &MiriConfig, layout_cx: LayoutCx<'tcx>) -> Self {
         let tcx = layout_cx.tcx;
         let local_crates = helpers::get_local_crates(tcx);
         let layouts =