Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Use a SmallVec for Candidate::match_pairs. #66540

Merged
merged 1 commit into from
Nov 25, 2019
Merged

Use a SmallVec for Candidate::match_pairs. #66540

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 4 additions & 3 deletions src/librustc_mir/build/matches/mod.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ use rustc::ty::{self, CanonicalUserTypeAnnotation, Ty};
use rustc::ty::layout::VariantIdx;
use rustc_index::bit_set::BitSet;
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use smallvec::{SmallVec, smallvec};
use syntax::ast::Name;
use syntax_pos::Span;

Expand Down Expand Up @@ -166,7 +167,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
|(pattern, pre_binding_block)| {
Candidate {
span: pattern.span,
match_pairs: vec![
match_pairs: smallvec![
MatchPair::new(scrutinee_place.clone(), pattern),
],
bindings: vec![],
Expand Down Expand Up @@ -421,7 +422,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
// create a dummy candidate
let mut candidate = Candidate {
span: irrefutable_pat.span,
match_pairs: vec![MatchPair::new(initializer.clone(), &irrefutable_pat)],
match_pairs: smallvec![MatchPair::new(initializer.clone(), &irrefutable_pat)],
bindings: vec![],
ascriptions: vec![],

Expand Down Expand Up @@ -671,7 +672,7 @@ pub struct Candidate<'pat, 'tcx> {
span: Span,

// all of these must be satisfied...
match_pairs: Vec<MatchPair<'pat, 'tcx>>,
match_pairs: SmallVec<[MatchPair<'pat, 'tcx>; 1]>,

// ...these bindings established...
bindings: Vec<Binding<'tcx>>,
Expand Down
3 changes: 2 additions & 1 deletion src/librustc_mir/build/matches/util.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ use crate::build::Builder;
use crate::build::matches::MatchPair;
use crate::hair::*;
use rustc::mir::*;
use smallvec::SmallVec;
use std::u32;
use std::convert::TryInto;

Expand All @@ -25,7 +26,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
}

pub fn prefix_slice_suffix<'pat>(&mut self,
match_pairs: &mut Vec<MatchPair<'pat, 'tcx>>,
match_pairs: &mut SmallVec<[MatchPair<'pat, 'tcx>; 1]>,
place: &Place<'tcx>,
prefix: &'pat [Pat<'tcx>],
opt_slice: Option<&'pat Pat<'tcx>>,
Expand Down