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| author | bors <bors@rust-lang.org> | 2020-01-28 20:26:24 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2020-01-28 20:26:24 +0000 |
| commit | 3761dcd3467441f78939ccb3b341b03b6a7558d7 (patch) | |
| tree | 9db360c58dde696d24eeb1f733cd1ec458743850 | |
| parent | ac2f3fa41ac5ae8425b959f955bb7433b7c57aea (diff) | |
| parent | 474d0e33717062696be4c9799ce9822bf7b56fc2 (diff) | |
Auto merge of #68606 - jonas-schievink:normalize-fastpath, r=Zoxc
Add an early-exit to `QueryNormalizer::fold_ty` Pulled out from https://github.com/rust-lang/rust/pull/68524, this results in a ~60-70% reduction in compile time for the await-call-tree benchmarks. This should unblock https://github.com/rust-lang/rust/issues/67982 as well. r? @Zoxc
| -rw-r--r-- | src/librustc/traits/query/normalize.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/librustc/traits/query/normalize.rs b/src/librustc/traits/query/normalize.rs index 8f23f98a2a4..20d7b556377 100644 --- a/src/librustc/traits/query/normalize.rs +++ b/src/librustc/traits/query/normalize.rs @@ -81,6 +81,10 @@ impl<'cx, 'tcx> TypeFolder<'tcx> for QueryNormalizer<'cx, 'tcx> { } fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> { + if !ty.has_projections() { + return ty; + } + let ty = ty.super_fold_with(self); match ty.kind { ty::Opaque(def_id, substs) if !substs.has_escaping_bound_vars() => { |