bjoernager/rust
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Prepare renumber MutVisitor to have projections interned

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This commit is contained in:
Santiago Pastorino 2019-10-07 18:15:19 -03:00
parent 591cc9aede
commit bb7d6d1c70
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GPG key ID: 88C941CDA1D46432
1 changed files with 21 additions and 2 deletions
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23
src/librustc_mir/borrow_check/nll/renumber.rs
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@ -1,7 +1,7 @@
use rustc::ty::subst::SubstsRef;
use rustc::ty::{self, Ty, TypeFoldable};
use rustc::mir::{Location, Body, Promoted};
use rustc::mir::visit::{MutVisitor, TyContext};
use rustc::mir::{Body, Location, Place, PlaceElem, Promoted};
use rustc::mir::visit::{MutVisitor, PlaceContext, TyContext};
use rustc::infer::{InferCtxt, NLLRegionVariableOrigin};
use rustc_index::vec::IndexVec;
@ -62,6 +62,25 @@ impl<'a, 'tcx> MutVisitor<'tcx> for NLLVisitor<'a, 'tcx> {
debug!("visit_ty: ty={:?}", ty);
}
fn visit_place(
&mut self,
place: &mut Place<'tcx>,
context: PlaceContext,
location: Location,
) {
self.visit_place_base(&mut place.base, context, location);
let new_projection: Vec<_> = place.projection.iter().map(|elem|
if let PlaceElem::Field(field, ty) = elem {
PlaceElem::Field(*field, self.renumber_regions(ty))
} else {
elem.clone()
}
).collect();
place.projection = new_projection.into_boxed_slice();
}
fn visit_substs(&mut self, substs: &mut SubstsRef<'tcx>, location: Location) {
debug!("visit_substs(substs={:?}, location={:?})", substs, location);