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Fix perf issue for auto trait selection

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This commit is contained in:
Guillaume Gomez 2022-03-26 14:58:19 +01:00
parent 3fe3b89cd5
commit ad88732254
3 changed files with 29 additions and 2 deletions
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4
compiler/rustc_trait_selection/src/traits/select/mod.rs
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@ -1272,7 +1272,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
// the master cache. Since coherence executes pretty quickly,
// it's not worth going to more trouble to increase the
// hit-rate, I don't think.
if self.intercrate || self.allow_negative_impls {
if self.intercrate {
return false;
}
@ -1289,7 +1289,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
// mode, so don't do any caching. In particular, we might
// re-use the same `InferCtxt` with both an intercrate
// and non-intercrate `SelectionContext`
if self.intercrate || self.allow_negative_impls {
if self.intercrate {
return None;
}
let tcx = self.tcx();