get_frame_masks
return get_frame_masks(instance, frame, insn_idx);
entry = get_frame_masks(callee_instance, f, callee_start);
insn = get_frame_masks(instance, frame, insn_idx);
succ_insn = get_frame_masks(instance, frame, succ->items[s]);
masks = get_frame_masks(instance, frameno, insn_idx);
masks = get_frame_masks(instance, frame, insn_idx);
masks = get_frame_masks(instance, frame, insn_idx);