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Cache ast::MacroCalls to their expansions in Semantics::descend_into_macros_impl

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This commit is contained in:
Lukas Wirth 2021-11-05 14:25:47 +01:00
parent 962be38004
commit af4d244462
1 changed files with 18 additions and 9 deletions
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23
crates/hir/src/semantics.rs
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@ -121,7 +121,10 @@ pub struct SemanticsImpl<'db> {
pub db: &'db dyn HirDatabase,
s2d_cache: RefCell<SourceToDefCache>,
expansion_info_cache: RefCell<FxHashMap<HirFileId, Option<ExpansionInfo>>>,
// Rootnode to HirFileId cache
cache: RefCell<FxHashMap<SyntaxNode, HirFileId>>,
// MacroCall to its expansion's HirFileId cache
macro_call_cache: RefCell<FxHashMap<InFile<ast::MacroCall>, HirFileId>>,
}
impl<DB> fmt::Debug for Semantics<'_, DB> {
@ -396,6 +399,7 @@ impl<'db> SemanticsImpl<'db> {
s2d_cache: Default::default(),
cache: Default::default(),
expansion_info_cache: Default::default(),
macro_call_cache: Default::default(),
}
}
@ -554,6 +558,7 @@ impl<'db> SemanticsImpl<'db> {
let sa = self.analyze(&parent);
let mut stack: SmallVec<[_; 1]> = smallvec![InFile::new(sa.file_id, token)];
let mut cache = self.expansion_info_cache.borrow_mut();
let mut mcache = self.macro_call_cache.borrow_mut();
let mut process_expansion_for_token =
|stack: &mut SmallVec<_>, file_id, item, token: InFile<&_>| {
@ -582,14 +587,10 @@ impl<'db> SemanticsImpl<'db> {
let was_not_remapped = (|| {
// are we inside an attribute macro call
let containing_attribute_macro_call = self.with_ctx(|ctx| {
token
.value
.ancestors()
.filter_map(ast::Item::cast)
.filter_map(|item| {
token.value.ancestors().filter_map(ast::Item::cast).find_map(|item| {
// investigate this, seems to be VERY(250ms) expensive in rust-analyzer/src/config.rs?
Some((ctx.item_to_macro_call(token.with_value(item.clone()))?, item))
})
.last()
});
if let Some((call_id, item)) = containing_attribute_macro_call {
let file_id = call_id.as_file();
@ -616,7 +617,15 @@ impl<'db> SemanticsImpl<'db> {
return None;
}
let file_id = sa.expand(self.db, token.with_value(&macro_call))?;
let mcall = token.with_value(macro_call);
let file_id = match mcache.get(&mcall) {
Some(&it) => it,
None => {
let it = sa.expand(self.db, mcall.as_ref())?;
mcache.insert(mcall, it);
it
}
};
return process_expansion_for_token(&mut stack, file_id, None, token.as_ref());
}