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Merge #5136

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5136: Split namespace maps in `ItemScope` r=jonas-schievink a=jonas-schievink

Reduces memory usage of the CrateDefMap query by ~130 MB (50%) on r-a.

I was also looking into handling glob imports more efficiently (storing scope chains instead of always duplicating everything into the glob-importing module's scope), but it seems that this already gives the most significant wins.

Co-authored-by: Jonas Schievink <jonas.schievink@ferrous-systems.com>
This commit is contained in:
bors[bot] 2020-06-30 12:10:21 +00:00 committed by GitHub
commit 3e70d0f308
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2 changed files with 73 additions and 44 deletions
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103
crates/ra_hir_def/src/item_scope.rs
View file

@ -1,6 +1,8 @@
//! Describes items defined or visible (ie, imported) in a certain scope.
//! This is shared between modules and blocks.
use std::collections::hash_map::Entry;
use hir_expand::name::Name;
use once_cell::sync::Lazy;
use ra_db::CrateId;
@ -27,7 +29,11 @@ pub struct PerNsGlobImports {
#[derive(Debug, Default, PartialEq, Eq)]
pub struct ItemScope {
visible: FxHashMap<Name, PerNs>,
types: FxHashMap<Name, (ModuleDefId, Visibility)>,
values: FxHashMap<Name, (ModuleDefId, Visibility)>,
macros: FxHashMap<Name, (MacroDefId, Visibility)>,
unresolved: FxHashSet<Name>,
defs: Vec<ModuleDefId>,
impls: Vec<ImplId>,
/// Macros visible in current module in legacy textual scope
@ -65,14 +71,16 @@ pub(crate) enum BuiltinShadowMode {
/// Other methods will only resolve values, types and module scoped macros only.
impl ItemScope {
pub fn entries<'a>(&'a self) -> impl Iterator<Item = (&'a Name, PerNs)> + 'a {
//FIXME: shadowing
self.visible.iter().map(|(n, def)| (n, *def))
}
// FIXME: shadowing
let keys: FxHashSet<_> = self
.types
.keys()
.chain(self.values.keys())
.chain(self.macros.keys())
.chain(self.unresolved.iter())
.collect();
pub fn entries_without_primitives<'a>(
&'a self,
) -> impl Iterator<Item = (&'a Name, PerNs)> + 'a {
self.visible.iter().map(|(n, def)| (n, *def))
keys.into_iter().map(move |name| (name, self.get(name)))
}
pub fn declarations(&self) -> impl Iterator<Item = ModuleDefId> + '_ {
@ -91,7 +99,7 @@ impl ItemScope {
/// Iterate over all module scoped macros
pub(crate) fn macros<'a>(&'a self) -> impl Iterator<Item = (&'a Name, MacroDefId)> + 'a {
self.visible.iter().filter_map(|(name, def)| def.take_macros().map(|macro_| (name, macro_)))
self.entries().filter_map(|(name, def)| def.take_macros().map(|macro_| (name, macro_)))
}
/// Iterate over all legacy textual scoped macros visible at the end of the module
@ -101,12 +109,16 @@ impl ItemScope {
/// Get a name from current module scope, legacy macros are not included
pub(crate) fn get(&self, name: &Name) -> PerNs {
self.visible.get(name).copied().unwrap_or_else(PerNs::none)
PerNs {
types: self.types.get(name).copied(),
values: self.values.get(name).copied(),
macros: self.macros.get(name).copied(),
}
}
pub(crate) fn name_of(&self, item: ItemInNs) -> Option<(&Name, Visibility)> {
for (name, per_ns) in &self.visible {
if let Some(vis) = item.match_with(*per_ns) {
for (name, per_ns) in self.entries() {
if let Some(vis) = item.match_with(per_ns) {
return Some((name, vis));
}
}
@ -114,8 +126,8 @@ impl ItemScope {
}
pub(crate) fn traits<'a>(&'a self) -> impl Iterator<Item = TraitId> + 'a {
self.visible.values().filter_map(|def| match def.take_types() {
Some(ModuleDefId::TraitId(t)) => Some(t),
self.types.values().filter_map(|(def, _)| match def {
ModuleDefId::TraitId(t) => Some(*t),
_ => None,
})
}
@ -138,21 +150,30 @@ impl ItemScope {
pub(crate) fn push_res(&mut self, name: Name, def: PerNs) -> bool {
let mut changed = false;
let existing = self.visible.entry(name).or_default();
if existing.types.is_none() && def.types.is_some() {
existing.types = def.types;
if let Some(types) = def.types {
self.types.entry(name.clone()).or_insert_with(|| {
changed = true;
types
});
}
if let Some(values) = def.values {
self.values.entry(name.clone()).or_insert_with(|| {
changed = true;
values
});
}
if let Some(macros) = def.macros {
self.macros.entry(name.clone()).or_insert_with(|| {
changed = true;
macros
});
}
if existing.values.is_none() && def.values.is_some() {
existing.values = def.values;
if def.is_none() {
if self.unresolved.insert(name) {
changed = true;
}
if existing.macros.is_none() && def.macros.is_some() {
existing.macros = def.macros;
changed = true;
}
changed
@ -166,17 +187,17 @@ impl ItemScope {
def_import_type: ImportType,
) -> bool {
let mut changed = false;
let existing = self.visible.entry(lookup.1.clone()).or_default();
macro_rules! check_changed {
(
$changed:ident,
( $existing:ident / $def:ident ) . $field:ident,
( $this:ident / $def:ident ) . $field:ident,
$glob_imports:ident [ $lookup:ident ],
$def_import_type:ident
) => {
match ($existing.$field, $def.$field) {
(None, Some(_)) => {
) => {{
let existing = $this.$field.entry($lookup.1.clone());
match (existing, $def.$field) {
(Entry::Vacant(entry), Some(_)) => {
match $def_import_type {
ImportType::Glob => {
$glob_imports.$field.insert($lookup.clone());
@ -186,32 +207,42 @@ impl ItemScope {
}
}
$existing.$field = $def.$field;
if let Some(fld) = $def.$field {
entry.insert(fld);
}
$changed = true;
}
(Some(_), Some(_))
(Entry::Occupied(mut entry), Some(_))
if $glob_imports.$field.contains(&$lookup)
&& matches!($def_import_type, ImportType::Named) =>
{
mark::hit!(import_shadowed);
$glob_imports.$field.remove(&$lookup);
$existing.$field = $def.$field;
if let Some(fld) = $def.$field {
entry.insert(fld);
}
$changed = true;
}
_ => {}
}
};
}};
}
check_changed!(changed, (existing / def).types, glob_imports[lookup], def_import_type);
check_changed!(changed, (existing / def).values, glob_imports[lookup], def_import_type);
check_changed!(changed, (existing / def).macros, glob_imports[lookup], def_import_type);
check_changed!(changed, (self / def).types, glob_imports[lookup], def_import_type);
check_changed!(changed, (self / def).values, glob_imports[lookup], def_import_type);
check_changed!(changed, (self / def).macros, glob_imports[lookup], def_import_type);
if def.is_none() {
if self.unresolved.insert(lookup.1) {
changed = true;
}
}
changed
}
pub(crate) fn resolutions<'a>(&'a self) -> impl Iterator<Item = (Name, PerNs)> + 'a {
self.visible.iter().map(|(name, res)| (name.clone(), *res))
self.entries().map(|(name, res)| (name.clone(), res))
}
pub(crate) fn collect_legacy_macros(&self) -> FxHashMap<Name, MacroDefId> {

6
crates/ra_hir_def/src/resolver.rs
View file

@ -511,11 +511,9 @@ impl Scope {
});
}
}
Scope::LocalItemsScope(body) => {
body.item_scope.entries_without_primitives().for_each(|(name, def)| {
Scope::LocalItemsScope(body) => body.item_scope.entries().for_each(|(name, def)| {
f(name.clone(), ScopeDef::PerNs(def));
})
}
}),
Scope::GenericParams { params, def } => {
for (local_id, param) in params.types.iter() {
if let Some(name) = &param.name {