diff options
| -rw-r--r-- | compiler/rustc_ty_utils/src/layout.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_ty_utils/src/layout.rs b/compiler/rustc_ty_utils/src/layout.rs index 904f1b38740..a03b82305f0 100644 --- a/compiler/rustc_ty_utils/src/layout.rs +++ b/compiler/rustc_ty_utils/src/layout.rs @@ -36,6 +36,9 @@ fn layout_of<'tcx>( let (param_env, ty) = query.into_parts(); debug!(?ty); + // Optimization: We convert to RevealAll and convert opaque types in the where bounds + // to their hidden types. This reduces overall uncached invocations of `layout_of` and + // is thus a small performance improvement. let param_env = param_env.with_reveal_all_normalized(tcx); let unnormalized_ty = ty; |