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whippet: avoid an atomic load when visiting already-marked objects

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This commit is contained in:
Andy Wingo 2024-07-10 11:47:15 +02:00
parent d50455ed1b
commit ff1e1b1d44
1 changed files with 2 additions and 1 deletions
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3
src/whippet.c
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@ -678,7 +678,8 @@ static inline int trace_edge(struct gc_heap *heap, struct gc_edge edge) {
struct gc_ref ref = gc_edge_ref(edge);
int is_new = do_trace(heap, edge, ref);
if (GC_UNLIKELY(atomic_load_explicit(&heap->check_pending_ephemerons,
if (is_new &&
GC_UNLIKELY(atomic_load_explicit(&heap->check_pending_ephemerons,
memory_order_relaxed)))
gc_resolve_pending_ephemerons(ref, heap);