Aaron Hill 3291218f47 Improve caching during trait evaluation ... Previously, we would 'forget' that we had `'static` regions in some place during trait evaluation. This lead to us producing `EvaluatedToOkModuloRegions` when we could have produced `EvaluatedToOk`, causing us to perform unnecessary work. This PR preserves `'static` regions when we canonicalize a predicate for `evaluate_obligation`, and when we 'freshen' a predicate during trait evaluation. Thie ensures that evaluating a predicate containing `'static` regions can produce `EvaluatedToOk` (assuming that we don't end up introducing any region dependencies during evaluation). Building off of this improved caching, we use `predicate_must_hold_considering_regions` during fulfillment of projection predicates to see if we can skip performing additional work. We already do this for trait predicates, but doing this for projection predicates lead to mixed performance results without the above caching improvements.		2021-07-21 17:54:05 -05:00
..
src	Improve caching during trait evaluation	2021-07-21 17:54:05 -05:00
Cargo.toml	bumped smallvec deps	2021-02-14 18:03:11 +03:00