From be03db0e3a75533f34d48c3014d532919b30a9e9 Mon Sep 17 00:00:00 2001 From: Florian Diebold Date: Thu, 8 Apr 2021 18:25:18 +0200 Subject: Intern Substitutions (Costs a bit of performance, reduces memory usage on RA by ~10%.) --- crates/hir_ty/src/display.rs | 20 ++++++++++---------- crates/hir_ty/src/infer/expr.rs | 2 +- crates/hir_ty/src/infer/pat.rs | 4 ++-- crates/hir_ty/src/infer/path.rs | 2 +- crates/hir_ty/src/lib.rs | 4 ++-- crates/hir_ty/src/traits/chalk/interner.rs | 23 +++++++++++++++-------- crates/hir_ty/src/traits/chalk/mapping.rs | 4 ++-- 7 files changed, 33 insertions(+), 26 deletions(-) (limited to 'crates/hir_ty') diff --git a/crates/hir_ty/src/display.rs b/crates/hir_ty/src/display.rs index d7a3977e5..92224b46b 100644 --- a/crates/hir_ty/src/display.rs +++ b/crates/hir_ty/src/display.rs @@ -265,7 +265,7 @@ impl HirDisplay for ProjectionTy { write!(f, " as {}", trait_.name)?; if self.substitution.len(&Interner) > 1 { write!(f, "<")?; - f.write_joined(&self.substitution.interned()[1..], ", ")?; + f.write_joined(&self.substitution.as_slice(&Interner)[1..], ", ")?; write!(f, ">")?; } write!(f, ">::{}", f.db.type_alias_data(from_assoc_type_id(self.associated_ty_id)).name)?; @@ -416,7 +416,7 @@ impl HirDisplay for Ty { write!(f, ",)")?; } else { write!(f, "(")?; - f.write_joined(&*substs.interned(), ", ")?; + f.write_joined(&*substs.as_slice(&Interner), ", ")?; write!(f, ")")?; } } @@ -444,7 +444,7 @@ impl HirDisplay for Ty { // We print all params except implicit impl Trait params. Still a bit weird; should we leave out parent and self? if total_len > 0 { write!(f, "<")?; - f.write_joined(¶meters.interned()[..total_len], ", ")?; + f.write_joined(¶meters.as_slice(&Interner)[..total_len], ", ")?; write!(f, ">")?; } } @@ -491,7 +491,7 @@ impl HirDisplay for Ty { .map(|generic_def_id| f.db.generic_defaults(generic_def_id)) .filter(|defaults| !defaults.is_empty()) { - None => parameters.interned().as_ref(), + None => parameters.as_slice(&Interner), Some(default_parameters) => { let mut default_from = 0; for (i, parameter) in parameters.iter(&Interner).enumerate() { @@ -515,11 +515,11 @@ impl HirDisplay for Ty { } } } - ¶meters.interned()[0..default_from] + ¶meters.as_slice(&Interner)[0..default_from] } } } else { - parameters.interned().as_ref() + parameters.as_slice(&Interner) }; if !parameters_to_write.is_empty() { write!(f, "<")?; @@ -542,7 +542,7 @@ impl HirDisplay for Ty { write!(f, "{}::{}", trait_.name, type_alias_data.name)?; if parameters.len(&Interner) > 0 { write!(f, "<")?; - f.write_joined(&*parameters.interned(), ", ")?; + f.write_joined(&*parameters.as_slice(&Interner), ", ")?; write!(f, ">")?; } } else { @@ -749,13 +749,13 @@ fn write_bounds_like_dyn_trait( // existential) here, which is the only thing that's // possible in actual Rust, and hence don't print it write!(f, "{}", f.db.trait_data(trait_).name)?; - if let [_, params @ ..] = &*trait_ref.substitution.interned().as_slice() { + if let [_, params @ ..] = &*trait_ref.substitution.as_slice(&Interner) { if is_fn_trait { if let Some(args) = params.first().and_then(|it| it.assert_ty_ref(&Interner).as_tuple()) { write!(f, "(")?; - f.write_joined(&*args.interned(), ", ")?; + f.write_joined(args.as_slice(&Interner), ", ")?; write!(f, ")")?; } } else if !params.is_empty() { @@ -814,7 +814,7 @@ fn fmt_trait_ref(tr: &TraitRef, f: &mut HirFormatter, use_as: bool) -> Result<() write!(f, "{}", f.db.trait_data(tr.hir_trait_id()).name)?; if tr.substitution.len(&Interner) > 1 { write!(f, "<")?; - f.write_joined(&tr.substitution.interned()[1..], ", ")?; + f.write_joined(&tr.substitution.as_slice(&Interner)[1..], ", ")?; write!(f, ">")?; } Ok(()) diff --git a/crates/hir_ty/src/infer/expr.rs b/crates/hir_ty/src/infer/expr.rs index cbbfa8b5c..ee6763926 100644 --- a/crates/hir_ty/src/infer/expr.rs +++ b/crates/hir_ty/src/infer/expr.rs @@ -462,7 +462,7 @@ impl<'a> InferenceContext<'a> { }; match canonicalized.decanonicalize_ty(derefed_ty.value).kind(&Interner) { TyKind::Tuple(_, substs) => name.as_tuple_index().and_then(|idx| { - substs.interned().get(idx).map(|a| a.assert_ty_ref(&Interner)).cloned() + substs.as_slice(&Interner).get(idx).map(|a| a.assert_ty_ref(&Interner)).cloned() }), TyKind::Adt(AdtId(hir_def::AdtId::StructId(s)), parameters) => { let local_id = self.db.struct_data(*s).variant_data.field(name)?; diff --git a/crates/hir_ty/src/infer/pat.rs b/crates/hir_ty/src/infer/pat.rs index a41e8e116..aea354cde 100644 --- a/crates/hir_ty/src/infer/pat.rs +++ b/crates/hir_ty/src/infer/pat.rs @@ -122,7 +122,7 @@ impl<'a> InferenceContext<'a> { let ty = match &body[pat] { &Pat::Tuple { ref args, ellipsis } => { let expectations = match expected.as_tuple() { - Some(parameters) => &*parameters.interned().as_slice(), + Some(parameters) => &*parameters.as_slice(&Interner), _ => &[], }; @@ -242,7 +242,7 @@ impl<'a> InferenceContext<'a> { let (inner_ty, alloc_ty) = match expected.as_adt() { Some((adt, subst)) if adt == box_adt => ( subst.at(&Interner, 0).assert_ty_ref(&Interner).clone(), - subst.interned().get(1).and_then(|a| a.ty(&Interner).cloned()), + subst.as_slice(&Interner).get(1).and_then(|a| a.ty(&Interner).cloned()), ), _ => (self.result.standard_types.unknown.clone(), None), }; diff --git a/crates/hir_ty/src/infer/path.rs b/crates/hir_ty/src/infer/path.rs index f8955aa32..495282eba 100644 --- a/crates/hir_ty/src/infer/path.rs +++ b/crates/hir_ty/src/infer/path.rs @@ -101,7 +101,7 @@ impl<'a> InferenceContext<'a> { let substs = ctx.substs_from_path(path, typable, true); let ty = TyBuilder::value_ty(self.db, typable) .use_parent_substs(&parent_substs) - .fill(substs.interned()[parent_substs.len(&Interner)..].iter().cloned()) + .fill(substs.as_slice(&Interner)[parent_substs.len(&Interner)..].iter().cloned()) .build(); Some(ty) } diff --git a/crates/hir_ty/src/lib.rs b/crates/hir_ty/src/lib.rs index 874c95411..beb58d711 100644 --- a/crates/hir_ty/src/lib.rs +++ b/crates/hir_ty/src/lib.rs @@ -109,7 +109,7 @@ pub type WhereClause = chalk_ir::WhereClause; pub fn subst_prefix(s: &Substitution, n: usize) -> Substitution { Substitution::from_iter( &Interner, - s.interned()[..std::cmp::min(s.len(&Interner), n)].iter().cloned(), + s.as_slice(&Interner)[..std::cmp::min(s.len(&Interner), n)].iter().cloned(), ) } @@ -187,7 +187,7 @@ impl CallableSig { .shifted_out_to(&Interner, DebruijnIndex::ONE) .expect("unexpected lifetime vars in fn ptr") .0 - .interned() + .as_slice(&Interner) .iter() .map(|arg| arg.assert_ty_ref(&Interner).clone()) .collect(), diff --git a/crates/hir_ty/src/traits/chalk/interner.rs b/crates/hir_ty/src/traits/chalk/interner.rs index 7a3bd41d4..17e056f03 100644 --- a/crates/hir_ty/src/traits/chalk/interner.rs +++ b/crates/hir_ty/src/traits/chalk/interner.rs @@ -3,11 +3,12 @@ use super::tls; use base_db::salsa::InternId; -use chalk_ir::{GenericArg, Goal, GoalData}; +use chalk_ir::{Goal, GoalData}; use hir_def::{ intern::{impl_internable, InternStorage, Internable, Interned}, TypeAliasId, }; +use crate::GenericArg; use smallvec::SmallVec; use std::{fmt, sync::Arc}; @@ -32,7 +33,13 @@ pub(crate) type Variances = chalk_ir::Variances; #[derive(PartialEq, Eq, Hash, Debug)] pub struct InternedVariableKindsInner(Vec>); -impl_internable!(InternedVariableKindsInner,); +#[derive(PartialEq, Eq, Hash, Debug)] +pub struct InternedSubstitutionInner(SmallVec<[GenericArg; 2]>); + +impl_internable!( + InternedVariableKindsInner, + InternedSubstitutionInner, +); impl chalk_ir::interner::Interner for Interner { type InternedType = Arc>; @@ -42,7 +49,7 @@ impl chalk_ir::interner::Interner for Interner { type InternedGenericArg = chalk_ir::GenericArgData; type InternedGoal = Arc>; type InternedGoals = Vec>; - type InternedSubstitution = SmallVec<[GenericArg; 2]>; + type InternedSubstitution = Interned; type InternedProgramClause = Arc>; type InternedProgramClauses = Arc<[chalk_ir::ProgramClause]>; type InternedQuantifiedWhereClauses = Vec>; @@ -107,7 +114,7 @@ impl chalk_ir::interner::Interner for Interner { } fn debug_generic_arg( - parameter: &GenericArg, + parameter: &GenericArg, fmt: &mut fmt::Formatter<'_>, ) -> Option { tls::with_current_program(|prog| Some(prog?.debug_generic_arg(parameter, fmt))) @@ -272,16 +279,16 @@ impl chalk_ir::interner::Interner for Interner { fn intern_substitution( &self, - data: impl IntoIterator, E>>, + data: impl IntoIterator>, ) -> Result { - data.into_iter().collect() + Ok(Interned::new(InternedSubstitutionInner(data.into_iter().collect::, _>>()?))) } fn substitution_data<'a>( &self, substitution: &'a Self::InternedSubstitution, - ) -> &'a [GenericArg] { - substitution + ) -> &'a [GenericArg] { + &substitution.as_ref().0 } fn intern_program_clause( diff --git a/crates/hir_ty/src/traits/chalk/mapping.rs b/crates/hir_ty/src/traits/chalk/mapping.rs index 7818f6387..e78581ea5 100644 --- a/crates/hir_ty/src/traits/chalk/mapping.rs +++ b/crates/hir_ty/src/traits/chalk/mapping.rs @@ -99,7 +99,7 @@ pub(super) fn generic_predicate_to_inline_bound( // have the expected self type return None; } - let args_no_self = trait_ref.substitution.interned()[1..] + let args_no_self = trait_ref.substitution.as_slice(&Interner)[1..] .iter() .map(|ty| ty.clone().cast(&Interner)) .collect(); @@ -111,7 +111,7 @@ pub(super) fn generic_predicate_to_inline_bound( return None; } let trait_ = projection_ty.trait_(db); - let args_no_self = projection_ty.substitution.interned()[1..] + let args_no_self = projection_ty.substitution.as_slice(&Interner)[1..] .iter() .map(|ty| ty.clone().cast(&Interner)) .collect(); -- cgit v1.2.3