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Simplify LocalUseMapBuild.

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It has four different `insert` methods, with some duplication. This
commit finds the commonality and removes them all.
This commit is contained in:
Nicholas Nethercote 2024-10-11 17:07:13 +11:00
parent 6ecf80e1ad
commit ce2f0b4ce9
1 changed files with 14 additions and 48 deletions
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62
compiler/rustc_borrowck/src/type_check/liveness/local_use_map.rs
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@ -137,56 +137,22 @@ struct LocalUseMapBuild<'me> {
locals_with_use_data: IndexVec<Local, bool>,
}
impl LocalUseMapBuild<'_> {
fn insert_def(&mut self, local: Local, location: Location) {
Self::insert(
self.elements,
&mut self.local_use_map.first_def_at[local],
&mut self.local_use_map.appearances,
location,
);
}
fn insert_use(&mut self, local: Local, location: Location) {
Self::insert(
self.elements,
&mut self.local_use_map.first_use_at[local],
&mut self.local_use_map.appearances,
location,
);
}
fn insert_drop(&mut self, local: Local, location: Location) {
Self::insert(
self.elements,
&mut self.local_use_map.first_drop_at[local],
&mut self.local_use_map.appearances,
location,
);
}
fn insert(
elements: &DenseLocationMap,
first_appearance: &mut Option<AppearanceIndex>,
appearances: &mut Appearances,
location: Location,
) {
let point_index = elements.point_from_location(location);
let appearance_index =
appearances.push(Appearance { point_index, next: *first_appearance });
*first_appearance = Some(appearance_index);
}
}
impl Visitor<'_> for LocalUseMapBuild<'_> {
fn visit_local(&mut self, local: Local, context: PlaceContext, location: Location) {
if self.locals_with_use_data[local] {
match def_use::categorize(context) {
Some(DefUse::Def) => self.insert_def(local, location),
Some(DefUse::Use) => self.insert_use(local, location),
Some(DefUse::Drop) => self.insert_drop(local, location),
_ => (),
}
if self.locals_with_use_data[local]
&& let Some(def_use) = def_use::categorize(context)
{
let first_appearance = match def_use {
DefUse::Def => &mut self.local_use_map.first_def_at[local],
DefUse::Use => &mut self.local_use_map.first_use_at[local],
DefUse::Drop => &mut self.local_use_map.first_drop_at[local],
};
let point_index = self.elements.point_from_location(location);
let appearance_index = self
.local_use_map
.appearances
.push(Appearance { point_index, next: *first_appearance });
*first_appearance = Some(appearance_index);
}
}
}