r2 99 gc/darwin_stop_world.c GC_push_one(state.r2); r2 182 gc/darwin_stop_world.c GC_push_one(info.r2); r2 357 gc/win32_threads.c # define PUSH2(r1,r2) PUSH1(r1), PUSH1(r2) r2 358 gc/win32_threads.c # define PUSH4(r1,r2,r3,r4) PUSH2(r1,r2), PUSH2(r3,r4)