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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:03:36 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:03:36 +0000
commit17d40c6057c88f4c432b0d7bac88e1b84cb7e67f (patch)
tree3f66c4a5918660bb8a758ab6cda5ff8ee4f6cdcd /compiler/rustc_data_structures/src/obligation_forest/mod.rs
parentAdding upstream version 1.64.0+dfsg1. (diff)
downloadrustc-17d40c6057c88f4c432b0d7bac88e1b84cb7e67f.tar.xz
rustc-17d40c6057c88f4c432b0d7bac88e1b84cb7e67f.zip
Adding upstream version 1.65.0+dfsg1.upstream/1.65.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'compiler/rustc_data_structures/src/obligation_forest/mod.rs')
-rw-r--r--compiler/rustc_data_structures/src/obligation_forest/mod.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/rustc_data_structures/src/obligation_forest/mod.rs b/compiler/rustc_data_structures/src/obligation_forest/mod.rs
index 07a96dd7d..e351b650a 100644
--- a/compiler/rustc_data_structures/src/obligation_forest/mod.rs
+++ b/compiler/rustc_data_structures/src/obligation_forest/mod.rs
@@ -117,6 +117,10 @@ pub trait ObligationProcessor {
}
/// The result type used by `process_obligation`.
+// `repr(C)` to inhibit the niche filling optimization. Otherwise, the `match` appearing
+// in `process_obligations` is significantly slower, which can substantially affect
+// benchmarks like `rustc-perf`'s inflate and keccak.
+#[repr(C)]
#[derive(Debug)]
pub enum ProcessResult<O, E> {
Unchanged,