if (ib) {
pipe_resource_reference(&nv50->idxbuf.buffer, ib->buffer);
nv50->idxbuf.index_size = ib->index_size;
if (ib->buffer) {
nv50->idxbuf.offset = ib->offset;
if (ib) {
pipe_resource_reference(&nv50->idxbuf.buffer, ib->buffer);
nv50->idxbuf.index_size = ib->index_size;
if (ib->buffer) {
nv50->idxbuf.offset = ib->offset;