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Avoid unneeded else branches

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Santiago Pastorino
2019-07-19 21:58:03 +02:00
parent 9b549d3c9d
commit 17a465cb85
1 changed files with 13 additions and 22 deletions
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src/librustc_mir/dataflow/move_paths/builder.rs
+13 -22
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@@ -429,30 +429,21 @@ fn gather_move(&mut self, place: &Place<'tcx>) {
fn gather_init(&mut self, place: PlaceRef<'cx, 'tcx>, kind: InitKind) {
debug!("gather_init({:?}, {:?})", self.loc, place);
let place = match place.projection {
// Check if we are assigning into a field of a union, if so, lookup the place
// of the union so it is marked as initialized again.
Some(box Projection {
base: proj_base,
elem: ProjectionElem::Field(_, _),
}) => {
if let ty::Adt(def, _) =
Place::ty_from(place.base, proj_base, self.builder.body, self.builder.tcx)
.ty
.sty
{
if def.is_union() {
PlaceRef { base: place.base, projection: proj_base }
} else {
place
}
} else {
place
let mut place = place;
// Check if we are assigning into a field of a union, if so, lookup the place
// of the union so it is marked as initialized again.
if let Some(box Projection { base: proj_base, elem: ProjectionElem::Field(_, _) }) =
place.projection
{
if let ty::Adt(def, _) =
Place::ty_from(place.base, proj_base, self.builder.body, self.builder.tcx).ty.sty
{
if def.is_union() {
place = PlaceRef { base: place.base, projection: proj_base }
}
}
_ => place
};
}
if let LookupResult::Exact(path) = self.builder.data.rev_lookup.find(place) {
let init = self.builder.data.inits.push(Init {