use `TypingEnv` when no `infcx` is available

the behavior of the type system not only depends on the current
assumptions, but also the currentnphase of the compiler. This is
mostly necessary as we need to decide whether and how to reveal
opaque types. We track this via the `TypingMode`.

1 files changed, 20 insertions, 18 deletions

diff --git a/compiler/rustc_ty_utils/src/abi.rs b/compiler/rustc_ty_utils/src/abi.rs
index 0184e93acf1..e2283383196 100644
--- a/compiler/rustc_ty_utils/src/abi.rs
+++ b/compiler/rustc_ty_utils/src/abi.rs
@@ -7,7 +7,7 @@ use rustc_hir::lang_items::LangItem;
 use rustc_middle::bug;
 use rustc_middle::query::Providers;
 use rustc_middle::ty::layout::{
-    FnAbiError, HasParamEnv, HasTyCtxt, LayoutCx, LayoutOf, TyAndLayout, fn_can_unwind,
+    FnAbiError, HasTyCtxt, HasTypingEnv, LayoutCx, LayoutOf, TyAndLayout, fn_can_unwind,
 };
 use rustc_middle::ty::{self, InstanceKind, Ty, TyCtxt};
 use rustc_session::config::OptLevel;
@@ -26,11 +26,11 @@ pub(crate) fn provide(providers: &mut Providers) {
 // for `Instance` (e.g. typeck would use `Ty::fn_sig` instead),
 // or should go through `FnAbi` instead, to avoid losing any
 // adjustments `fn_abi_of_instance` might be performing.
-#[tracing::instrument(level = "debug", skip(tcx, param_env))]
+#[tracing::instrument(level = "debug", skip(tcx, typing_env))]
 fn fn_sig_for_fn_abi<'tcx>(
     tcx: TyCtxt<'tcx>,
     instance: ty::Instance<'tcx>,
-    param_env: ty::ParamEnv<'tcx>,
+    typing_env: ty::TypingEnv<'tcx>,
 ) -> ty::PolyFnSig<'tcx> {
     if let InstanceKind::ThreadLocalShim(..) = instance.def {
         return ty::Binder::dummy(tcx.mk_fn_sig(
@@ -42,7 +42,7 @@ fn fn_sig_for_fn_abi<'tcx>(
         ));
     }
 
-    let ty = instance.ty(tcx, param_env);
+    let ty = instance.ty(tcx, typing_env);
     match *ty.kind() {
         ty::FnDef(..) => {
             // HACK(davidtwco,eddyb): This is a workaround for polymorphization considering
@@ -56,7 +56,10 @@ fn fn_sig_for_fn_abi<'tcx>(
                 ty::FnDef(def_id, args) => tcx
                     .fn_sig(def_id)
                     .map_bound(|fn_sig| {
-                        tcx.normalize_erasing_regions(tcx.param_env(def_id), fn_sig)
+                        tcx.normalize_erasing_regions(
+                            ty::TypingEnv::non_body_analysis(tcx, def_id),
+                            fn_sig,
+                        )
                     })
                     .instantiate(tcx, args),
                 _ => unreachable!(),
@@ -329,27 +332,26 @@ fn conv_from_spec_abi(tcx: TyCtxt<'_>, abi: ExternAbi, c_variadic: bool) -> Conv
 
 fn fn_abi_of_fn_ptr<'tcx>(
     tcx: TyCtxt<'tcx>,
-    query: ty::ParamEnvAnd<'tcx, (ty::PolyFnSig<'tcx>, &'tcx ty::List<Ty<'tcx>>)>,
+    query: ty::PseudoCanonicalInput<'tcx, (ty::PolyFnSig<'tcx>, &'tcx ty::List<Ty<'tcx>>)>,
 ) -> Result<&'tcx FnAbi<'tcx, Ty<'tcx>>, &'tcx FnAbiError<'tcx>> {
-    let (param_env, (sig, extra_args)) = query.into_parts();
-
-    let cx = LayoutCx::new(tcx, param_env);
+    let ty::PseudoCanonicalInput { typing_env, value: (sig, extra_args) } = query;
+    let cx = LayoutCx::new(tcx, typing_env);
     fn_abi_new_uncached(&cx, sig, extra_args, None, None, false)
 }
 
 fn fn_abi_of_instance<'tcx>(
     tcx: TyCtxt<'tcx>,
-    query: ty::ParamEnvAnd<'tcx, (ty::Instance<'tcx>, &'tcx ty::List<Ty<'tcx>>)>,
+    query: ty::PseudoCanonicalInput<'tcx, (ty::Instance<'tcx>, &'tcx ty::List<Ty<'tcx>>)>,
 ) -> Result<&'tcx FnAbi<'tcx, Ty<'tcx>>, &'tcx FnAbiError<'tcx>> {
-    let (param_env, (instance, extra_args)) = query.into_parts();
+    let ty::PseudoCanonicalInput { typing_env, value: (instance, extra_args) } = query;
 
-    let sig = fn_sig_for_fn_abi(tcx, instance, param_env);
+    let sig = fn_sig_for_fn_abi(tcx, instance, typing_env);
 
     let caller_location =
         instance.def.requires_caller_location(tcx).then(|| tcx.caller_location_ty());
 
     fn_abi_new_uncached(
-        &LayoutCx::new(tcx, param_env),
+        &LayoutCx::new(tcx, typing_env),
         sig,
         extra_args,
         caller_location,
@@ -395,7 +397,7 @@ fn adjust_for_rust_scalar<'tcx>(
             Some(kind)
         } else if let Some(pointee) = drop_target_pointee {
             // The argument to `drop_in_place` is semantically equivalent to a mutable reference.
-            Some(PointerKind::MutableRef { unpin: pointee.is_unpin(tcx, cx.param_env()) })
+            Some(PointerKind::MutableRef { unpin: pointee.is_unpin(tcx, cx.typing_env.param_env) })
         } else {
             None
         };
@@ -542,7 +544,7 @@ fn fn_abi_sanity_check<'tcx>(
                 // With metadata. Must be unsized and not on the stack.
                 assert!(arg.layout.is_unsized() && !on_stack);
                 // Also, must not be `extern` type.
-                let tail = tcx.struct_tail_for_codegen(arg.layout.ty, cx.param_env());
+                let tail = tcx.struct_tail_for_codegen(arg.layout.ty, cx.typing_env);
                 if matches!(tail.kind(), ty::Foreign(..)) {
                     // These types do not have metadata, so having `meta_attrs` is bogus.
                     // Conceptually, unsized arguments must be copied around, which requires dynamically
@@ -573,7 +575,7 @@ fn fn_abi_new_uncached<'tcx>(
     force_thin_self_ptr: bool,
 ) -> Result<&'tcx FnAbi<'tcx, Ty<'tcx>>, &'tcx FnAbiError<'tcx>> {
     let tcx = cx.tcx();
-    let sig = tcx.normalize_erasing_late_bound_regions(cx.param_env, sig);
+    let sig = tcx.normalize_erasing_late_bound_regions(cx.typing_env, sig);
 
     let conv = conv_from_spec_abi(cx.tcx(), sig.abi, sig.c_variadic);
 
@@ -744,7 +746,7 @@ fn fn_abi_adjust_for_abi<'tcx>(
 
 #[tracing::instrument(level = "debug", skip(cx))]
 fn make_thin_self_ptr<'tcx>(
-    cx: &(impl HasTyCtxt<'tcx> + HasParamEnv<'tcx>),
+    cx: &(impl HasTyCtxt<'tcx> + HasTypingEnv<'tcx>),
     layout: TyAndLayout<'tcx>,
 ) -> TyAndLayout<'tcx> {
     let tcx = cx.tcx();
@@ -784,6 +786,6 @@ fn make_thin_self_ptr<'tcx>(
 
         // NOTE(eddyb) using an empty `ParamEnv`, and `unwrap`-ing the `Result`
         // should always work because the type is always `*mut ()`.
-        ..tcx.layout_of(ty::ParamEnv::reveal_all().and(unit_ptr_ty)).unwrap()
+        ..tcx.layout_of(ty::TypingEnv::fully_monomorphized().as_query_input(unit_ptr_ty)).unwrap()
     }
 }