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Fast path for register_region_obligation #141129

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Merged
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May 18, 2025
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Merged

Fast path for register_region_obligation #141129

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8 changes: 8 additions & 0 deletions compiler/rustc_infer/src/infer/outlives/obligations.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,14 @@ impl<'tcx> InferCtxt<'tcx> {
sub_region: Region<'tcx>,
cause: &ObligationCause<'tcx>,
) {
// `is_global` means the type has no params, infer, placeholder, or non-`'static`
// free regions. If the type has none of these things, then we can skip registering
// this outlives obligation since it has no components which affect lifetime
// checking in an interesting way.
if sup_type.is_global() {
return;
}

debug!(?sup_type, ?sub_region, ?cause);
let origin = SubregionOrigin::from_obligation_cause(cause, || {
infer::RelateParamBound(
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