bjoernager/rust
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Canonicalize const variables correctly

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This commit is contained in:
Michael Goulet 2022-01-07 09:13:00 -08:00
parent 72e74d7b9c
commit 012910dab2
4 changed files with 11 additions and 14 deletions
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2
compiler/rustc_infer/src/infer/canonical/canonicalizer.rs
View file

@ -425,7 +425,7 @@ impl<'cx, 'tcx> TypeFolder<'tcx> for Canonicalizer<'cx, 'tcx> {
// FIXME: perf problem described in #55921.
ui = ty::UniverseIndex::ROOT;
return self.canonicalize_const_var(
CanonicalVarInfo { kind: CanonicalVarKind::Const(ui) },
CanonicalVarInfo { kind: CanonicalVarKind::Const(ui, ct.ty) },
ct,
);
}

7
compiler/rustc_infer/src/infer/canonical/mod.rs
View file

@ -137,12 +137,9 @@ impl<'cx, 'tcx> InferCtxt<'cx, 'tcx> {
self.tcx.mk_region(ty::RePlaceholder(placeholder_mapped)).into()
}
CanonicalVarKind::Const(ui) => self
CanonicalVarKind::Const(ui, ty) => self
.next_const_var_in_universe(
self.next_ty_var_in_universe(
TypeVariableOrigin { kind: TypeVariableOriginKind::MiscVariable, span },
universe_map(ui),
),
ty,
ConstVariableOrigin { kind: ConstVariableOriginKind::MiscVariable, span },
universe_map(ui),
)

8
compiler/rustc_middle/src/infer/canonical.rs
View file

@ -23,7 +23,7 @@
use crate::infer::MemberConstraint;
use crate::ty::subst::GenericArg;
use crate::ty::{self, BoundVar, List, Region, TyCtxt};
use crate::ty::{self, BoundVar, List, Region, Ty, TyCtxt};
use rustc_index::vec::IndexVec;
use rustc_macros::HashStable;
use smallvec::SmallVec;
@ -104,7 +104,7 @@ impl<'tcx> CanonicalVarInfo<'tcx> {
CanonicalVarKind::PlaceholderTy(_) => false,
CanonicalVarKind::Region(_) => true,
CanonicalVarKind::PlaceholderRegion(..) => false,
CanonicalVarKind::Const(_) => true,
CanonicalVarKind::Const(..) => true,
CanonicalVarKind::PlaceholderConst(_) => false,
}
}
@ -130,7 +130,7 @@ pub enum CanonicalVarKind<'tcx> {
PlaceholderRegion(ty::PlaceholderRegion),
/// Some kind of const inference variable.
Const(ty::UniverseIndex),
Const(ty::UniverseIndex, Ty<'tcx>),
/// A "placeholder" that represents "any const".
PlaceholderConst(ty::PlaceholderConst<'tcx>),
@ -147,7 +147,7 @@ impl<'tcx> CanonicalVarKind<'tcx> {
CanonicalVarKind::PlaceholderTy(placeholder) => placeholder.universe,
CanonicalVarKind::Region(ui) => ui,
CanonicalVarKind::PlaceholderRegion(placeholder) => placeholder.universe,
CanonicalVarKind::Const(ui) => ui,
CanonicalVarKind::Const(ui, _) => ui,
CanonicalVarKind::PlaceholderConst(placeholder) => placeholder.universe,
}
}

8
compiler/rustc_traits/src/chalk/mod.rs
View file

@ -85,7 +85,7 @@ crate fn evaluate_goal<'tcx>(
chalk_ir::VariableKind::Lifetime,
chalk_ir::UniverseIndex { counter: ui.index() },
),
CanonicalVarKind::Const(_ui) => unimplemented!(),
CanonicalVarKind::Const(_ui, _ty) => unimplemented!(),
CanonicalVarKind::PlaceholderConst(_pc) => unimplemented!(),
}),
),
@ -127,9 +127,9 @@ crate fn evaluate_goal<'tcx>(
chalk_ir::VariableKind::Lifetime => CanonicalVarKind::Region(
ty::UniverseIndex::from_usize(var.skip_kind().counter),
),
chalk_ir::VariableKind::Const(_) => CanonicalVarKind::Const(
ty::UniverseIndex::from_usize(var.skip_kind().counter),
),
// FIXME(compiler-errors): We don't currently have a way of turning
// a Chalk ty back into a rustc ty, right?
chalk_ir::VariableKind::Const(_) => todo!(),
};
CanonicalVarInfo { kind }
})