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| author | Oli Scherer <git-spam-no-reply9815368754983@oli-obk.de> | 2023-09-18 15:17:52 +0000 |
|---|---|---|
| committer | Oli Scherer <git-spam-no-reply9815368754983@oli-obk.de> | 2023-09-18 15:17:52 +0000 |
| commit | ee59531dfcd3185335322f29aa806aefe2aaa7ac (patch) | |
| tree | 2a24a97baa4ea7ec4b120c6896c85276b51e4114 | |
| parent | de68911f4adaed19ac662880cf1a5ded9e44d685 (diff) | |
| download | rust-ee59531dfcd3185335322f29aa806aefe2aaa7ac.tar.gz rust-ee59531dfcd3185335322f29aa806aefe2aaa7ac.zip | |
Explain `with_reveal_all_normalized` usage
| -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; |