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rustc/ty: improve allocations

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This commit is contained in:
ljedrz 2018-10-02 11:00:41 +02:00
parent db171649d3
commit 04b99bc103
3 changed files with 3 additions and 5 deletions
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6
src/librustc/ty/outlives.rs
View File

@ -180,9 +180,5 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
}
fn push_region_constraints<'tcx>(out: &mut Vec<Component<'tcx>>, regions: Vec<ty::Region<'tcx>>) {
for r in regions {
if !r.is_late_bound() {
out.push(Component::Region(r));
}
}
out.extend(regions.iter().filter(|&r| !r.is_late_bound()).map(|r| Component::Region(r)));
}

1
src/librustc/ty/subst.rs
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@ -229,6 +229,7 @@ impl<'a, 'gcx, 'tcx> Substs<'tcx> {
mk_kind: &mut F)
where F: FnMut(&ty::GenericParamDef, &[Kind<'tcx>]) -> Kind<'tcx>
{
substs.reserve(defs.params.len());
for param in &defs.params {
let kind = mk_kind(param, substs);
assert_eq!(param.index as usize, substs.len());

1
src/librustc/ty/wf.rs
View File

@ -493,6 +493,7 @@ impl<'a, 'gcx, 'tcx> WfPredicates<'a, 'gcx, 'tcx> {
let explicit_bound = region;
self.out.reserve(implicit_bounds.len());
for implicit_bound in implicit_bounds {
let cause = self.cause(traits::ObjectTypeBound(ty, explicit_bound));
let outlives = ty::Binder::dummy(