diff options
| author | Eduard-Mihai Burtescu <edy.burt@gmail.com> | 2020-11-05 19:28:36 +0200 |
|---|---|---|
| committer | Eduard-Mihai Burtescu <eddyb@lyken.rs> | 2022-06-13 08:06:07 +0000 |
| commit | 85947f0fe26360c17ea877ae67cac7c092de9cfc (patch) | |
| tree | 86067c34a73b1f1bfc6d7475cd4784edad293685 /compiler | |
| parent | 44783f1db0bd1076d825b2b681c4220bbf97bbec (diff) | |
| download | rust-85947f0fe26360c17ea877ae67cac7c092de9cfc.tar.gz rust-85947f0fe26360c17ea877ae67cac7c092de9cfc.zip | |
rustc_trait_selection: work around instruction-counting non-determinism.
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_trait_selection/src/traits/select/mod.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs index a484b594418..60e13d9b8c3 100644 --- a/compiler/rustc_trait_selection/src/traits/select/mod.rs +++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs @@ -1525,6 +1525,12 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { other: &EvaluatedCandidate<'tcx>, needs_infer: bool, ) -> bool { + // HACK(eddyb) remove instruction-counting noise from `-Z self-profile`. + #[cfg(target_arch = "x86_64")] + unsafe { + std::arch::asm!("mfence", options(nostack)); + } + if victim.candidate == other.candidate { return true; } |