The bitmasks with the 31st, 32nd and 63rd bit set are added. The make up
the largest bitmasks on 32bit/64bit that can be represented without
allocating and the smallest bitmask on 32bit that must be allocated.
static const char *tests[] = {
"0",
"1",
+ "1000000000000000000000000000000",
+ "10000000000000000000000000000000",
+ "100000000000000000000000000000000000000000000000000000000000000",
"1000000000000000000000000000000000000000000000000000000000000000",
"10000000000000000000000000000000000000000000000000000000000000000",
"1010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010",