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Add SMIR visitor for Places and projections

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Kirby Linvill 2023-11-10 11:21:46 -07:00
parent 998aa383ba
commit d517a1cbda
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2 changed files with 33 additions and 2 deletions
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2
compiler/stable_mir/src/mir/body.rs
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@ -406,7 +406,7 @@ pub struct Place {
// ProjectionElem<Local, Ty>) and user-provided type annotations (for which the projection elements
// are of type ProjectionElem<(), ()>). In SMIR we don't need this generality, so we just use
// ProjectionElem for Places.
#[derive(Clone, Debug)]
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum ProjectionElem {
/// Dereference projections (e.g. `*_1`) project to the address referenced by the base place.
Deref,

33
compiler/stable_mir/src/mir/visit.rs
View File

@ -76,6 +76,15 @@ pub trait MirVisitor {
self.super_place(place, ptx, location)
}
fn visit_projection_elem(
&mut self,
elem: &ProjectionElem,
ptx: PlaceContext,
location: Location,
) {
self.super_projection_elem(elem, ptx, location);
}
fn visit_local(&mut self, local: &Local, ptx: PlaceContext, location: Location) {
let _ = (local, ptx, location);
}
@ -264,7 +273,29 @@ pub trait MirVisitor {
fn super_place(&mut self, place: &Place, ptx: PlaceContext, location: Location) {
let _ = location;
let _ = ptx;
visit_opaque(&Opaque(place.projection.clone()));
self.visit_local(&place.local, ptx, location);
for elem in &place.projection {
self.visit_projection_elem(elem, ptx, location);
}
}
fn super_projection_elem(
&mut self,
elem: &ProjectionElem,
ptx: PlaceContext,
location: Location,
) {
match elem {
ProjectionElem::Deref => {}
ProjectionElem::Field(_idx, ty) => self.visit_ty(ty, location),
ProjectionElem::Index(local) => self.visit_local(local, ptx, location),
ProjectionElem::ConstantIndex { offset: _, min_length: _, from_end: _ } => {}
ProjectionElem::Subslice { from: _, to: _, from_end: _ } => {}
ProjectionElem::Downcast(_idx) => {}
ProjectionElem::OpaqueCast(ty) => self.visit_ty(ty, location),
ProjectionElem::Subtype(ty) => self.visit_ty(ty, location),
}
}
fn super_rvalue(&mut self, rvalue: &Rvalue, location: Location) {