typ := (*rtype)(resolveTypeOff(rodata, off))
			r = append(r, typ.String())
		}
	}
	return r
}

var GCBits = gcbits

func gcbits(any) []byte // provided by runtime

func MapBucketOf(x, y Type) Type {
	return toType(bucketOf(x.common(), y.common()))
}

func CachedBucketOf(m Type) Type {
	t := m.(*rtype)
	if Kind(t.t.Kind_&abi.KindMask) != Map {
		panic("not map")
	}

	verifyGCBits(t, SliceOf(ArrayOf(10000, Tscalar)), lit(1))

	hdr := make([]byte, bucketCount/goarch.PtrSize)

	verifyMapBucket := func(t *testing.T, k, e Type, m any, want []byte) {
		verifyGCBits(t, MapBucketOf(k, e), want)
		verifyGCBits(t, CachedBucketOf(TypeOf(m)), want)
	}
	verifyMapBucket(t,
		Tscalar, Tptr,
		map[Xscalar]Xptr(nil),
		join(hdr, rep(bucketCount, lit(0)), rep(bucketCount, lit(1)), lit(1)))