Function next_inst_ret_prev

cranelift/src/bugpoint.rs:760–776

(
    func: &Function,
    block: &mut Block,
    inst: &mut Inst,
)

}

fn next_inst_ret_prev(
    func: &Function,
    block: &mut Block,
    inst: &mut Inst,
) -> Option<(Block, Inst)> {
    let prev = (*block, *inst);
    if let Some(next_inst) = func.layout.next_inst(*inst) {
        *inst = next_inst;
        return Some(prev);
    }
    if let Some(next_block) = func.layout.next_block(*block) {
        *block = next_block;
        *inst = func.layout.first_inst(*block).expect("no inst");
        return Some(prev);
    }
    None
}

fn block_count(func: &Function) -> usize {
    func.layout.blocks().count()