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Revert "Auto merge of #91354 - fee1-dead:const_env, r=spastorino"

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This reverts commit 18bb8c61a9, reversing
changes made to d9baa36190.
This commit is contained in:
Santiago Pastorino 2021-12-03 10:11:21 -03:00
parent 3e21768a0a
commit 85b723c4e6
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GPG key ID: 8131A24E0C79EFAF
49 changed files with 428 additions and 376 deletions
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36
compiler/rustc_trait_selection/src/traits/mod.rs
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@ -33,7 +33,8 @@ use rustc_hir::lang_items::LangItem;
use rustc_middle::ty::fold::TypeFoldable;
use rustc_middle::ty::subst::{InternalSubsts, SubstsRef};
use rustc_middle::ty::{
self, GenericParamDefKind, ToPredicate, Ty, TyCtxt, VtblEntry, COMMON_VTABLE_ENTRIES,
self, GenericParamDefKind, ToPredicate, Ty, TyCtxt, VtblEntry, WithConstness,
COMMON_VTABLE_ENTRIES,
};
use rustc_span::{sym, Span};
use smallvec::SmallVec;
@ -306,11 +307,8 @@ pub fn normalize_param_env_or_error<'tcx>(
debug!("normalize_param_env_or_error: elaborated-predicates={:?}", predicates);
let elaborated_env = ty::ParamEnv::new(
tcx.intern_predicates(&predicates),
unnormalized_env.reveal(),
unnormalized_env.constness(),
);
let elaborated_env =
ty::ParamEnv::new(tcx.intern_predicates(&predicates), unnormalized_env.reveal());
// HACK: we are trying to normalize the param-env inside *itself*. The problem is that
// normalization expects its param-env to be already normalized, which means we have
@ -362,11 +360,8 @@ pub fn normalize_param_env_or_error<'tcx>(
// predicates here anyway. Keeping them here anyway because it seems safer.
let outlives_env: Vec<_> =
non_outlives_predicates.iter().chain(&outlives_predicates).cloned().collect();
let outlives_env = ty::ParamEnv::new(
tcx.intern_predicates(&outlives_env),
unnormalized_env.reveal(),
unnormalized_env.constness(),
);
let outlives_env =
ty::ParamEnv::new(tcx.intern_predicates(&outlives_env), unnormalized_env.reveal());
let outlives_predicates = match do_normalize_predicates(
tcx,
region_context,
@ -386,11 +381,7 @@ pub fn normalize_param_env_or_error<'tcx>(
let mut predicates = non_outlives_predicates;
predicates.extend(outlives_predicates);
debug!("normalize_param_env_or_error: final predicates={:?}", predicates);
ty::ParamEnv::new(
tcx.intern_predicates(&predicates),
unnormalized_env.reveal(),
unnormalized_env.constness(),
)
ty::ParamEnv::new(tcx.intern_predicates(&predicates), unnormalized_env.reveal())
}
pub fn fully_normalize<'a, 'tcx, T>(
@ -573,17 +564,14 @@ fn prepare_vtable_segments<'tcx, T>(
.predicates
.into_iter()
.filter_map(move |(pred, _)| {
pred.subst_supertrait(tcx, &inner_most_trait_ref).to_opt_poly_trait_pred()
pred.subst_supertrait(tcx, &inner_most_trait_ref).to_opt_poly_trait_ref()
});
'diving_in_skip_visited_traits: loop {
if let Some(next_super_trait) = direct_super_traits_iter.next() {
if visited.insert(next_super_trait.to_predicate(tcx)) {
// We're throwing away potential constness of super traits here.
// FIXME: handle ~const super traits
let next_super_trait = next_super_trait.map_bound(|t| t.trait_ref);
stack.push((
next_super_trait,
next_super_trait.value,
emit_vptr_on_new_entry,
Some(direct_super_traits_iter),
));
@ -615,11 +603,7 @@ fn prepare_vtable_segments<'tcx, T>(
if let Some(siblings) = siblings_opt {
if let Some(next_inner_most_trait_ref) = siblings.next() {
if visited.insert(next_inner_most_trait_ref.to_predicate(tcx)) {
// We're throwing away potential constness of super traits here.
// FIXME: handle ~const super traits
let next_inner_most_trait_ref =
next_inner_most_trait_ref.map_bound(|t| t.trait_ref);
*inner_most_trait_ref = next_inner_most_trait_ref;
*inner_most_trait_ref = next_inner_most_trait_ref.value;
*emit_vptr = emit_vptr_on_new_entry;
break 'exiting_out;
} else {