Merge from rustc

Author: RalfJung

src/borrow_tracker/stacked_borrows/mod.rs

@@ -71,7 +71,7 @@ impl NewPermission {
                         access: None,
                         protector: None,
                     }
-                } else if pointee.is_unpin(*cx.tcx, cx.param_env()) {
+                } else if pointee.is_unpin(*cx.tcx, cx.typing_env()) {
                     // A regular full mutable reference. On `FnEntry` this is `noalias` and `dereferenceable`.
                     NewPermission::Uniform {
                         perm: Permission::Unique,
@@ -129,7 +129,7 @@ impl NewPermission {
     fn from_box_ty<'tcx>(ty: Ty<'tcx>, kind: RetagKind, cx: &crate::MiriInterpCx<'tcx>) -> Self {
         // `ty` is not the `Box` but the field of the Box with this pointer (due to allocator handling).
         let pointee = ty.builtin_deref(true).unwrap();
-        if pointee.is_unpin(*cx.tcx, cx.param_env()) {
+        if pointee.is_unpin(*cx.tcx, cx.typing_env()) {
             // A regular box. On `FnEntry` this is `noalias`, but not `dereferenceable` (hence only
             // a weak protector).
             NewPermission::Uniform {
@@ -608,7 +608,7 @@ trait EvalContextPrivExt<'tcx, 'ecx>: crate::MiriInterpCxExt<'tcx> {
                 match new_perm {
                     NewPermission::Uniform { perm, .. } =>
                         write!(kind_str, "{perm:?} permission").unwrap(),
-                    NewPermission::FreezeSensitive { freeze_perm, .. } if ty.is_freeze(*this.tcx, this.param_env()) =>
+                    NewPermission::FreezeSensitive { freeze_perm, .. } if ty.is_freeze(*this.tcx, this.typing_env()) =>
                         write!(kind_str, "{freeze_perm:?} permission").unwrap(),
                     NewPermission::FreezeSensitive { freeze_perm, nonfreeze_perm, .. }  =>
                         write!(kind_str, "{freeze_perm:?}/{nonfreeze_perm:?} permission for frozen/non-frozen parts").unwrap(),

src/borrow_tracker/tree_borrows/mod.rs

@@ -132,8 +132,8 @@ impl<'tcx> NewPermission {
         kind: RetagKind,
         cx: &crate::MiriInterpCx<'tcx>,
     ) -> Option<Self> {
-        let ty_is_freeze = pointee.is_freeze(*cx.tcx, cx.param_env());
-        let ty_is_unpin = pointee.is_unpin(*cx.tcx, cx.param_env());
+        let ty_is_freeze = pointee.is_freeze(*cx.tcx, cx.typing_env());
+        let ty_is_unpin = pointee.is_unpin(*cx.tcx, cx.typing_env());
         let is_protected = kind == RetagKind::FnEntry;
         // As demonstrated by `tests/fail/tree_borrows/reservedim_spurious_write.rs`,
         // interior mutability and protectors interact poorly.
@@ -164,10 +164,10 @@ impl<'tcx> NewPermission {
         zero_size: bool,
     ) -> Option<Self> {
         let pointee = ty.builtin_deref(true).unwrap();
-        pointee.is_unpin(*cx.tcx, cx.param_env()).then_some(()).map(|()| {
+        pointee.is_unpin(*cx.tcx, cx.typing_env()).then_some(()).map(|()| {
             // Regular `Unpin` box, give it `noalias` but only a weak protector
             // because it is valid to deallocate it within the function.
-            let ty_is_freeze = ty.is_freeze(*cx.tcx, cx.param_env());
+            let ty_is_freeze = ty.is_freeze(*cx.tcx, cx.typing_env());
             let protected = kind == RetagKind::FnEntry;
             let initial_state = Permission::new_reserved(ty_is_freeze, protected);
             Self {
@@ -521,7 +521,7 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
         // Note: if we were to inline `new_reserved` below we would find out that
         // `ty_is_freeze` is eventually unused because it appears in a `ty_is_freeze || true`.
         // We are nevertheless including it here for clarity.
-        let ty_is_freeze = place.layout.ty.is_freeze(*this.tcx, this.param_env());
+        let ty_is_freeze = place.layout.ty.is_freeze(*this.tcx, this.typing_env());
         // Retag it. With protection! That is the entire point.
         let new_perm = NewPermission {
             initial_state: Permission::new_reserved(ty_is_freeze, /* protected */ true),

src/eval.rs

@@ -273,7 +273,7 @@ pub fn create_ecx<'tcx>(
     let mut ecx = InterpCx::new(
         tcx,
         rustc_span::DUMMY_SP,
-        typing_env.param_env,
+        typing_env,
         MiriMachine::new(config, layout_cx),
     );
 

src/machine.rs

@@ -17,7 +17,9 @@ use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::static_assert_size;
 use rustc_middle::mir;
 use rustc_middle::query::TyCtxtAt;
-use rustc_middle::ty::layout::{HasTyCtxt, LayoutCx, LayoutError, LayoutOf, TyAndLayout};
+use rustc_middle::ty::layout::{
+    HasTyCtxt, HasTypingEnv, LayoutCx, LayoutError, LayoutOf, TyAndLayout,
+};
 use rustc_middle::ty::{self, Instance, Ty, TyCtxt};
 use rustc_session::config::InliningThreshold;
 use rustc_span::def_id::{CrateNum, DefId};