Method to_backwards_insn_index

cranelift/codegen/src/machinst/vcode.rs:51–53

(&self, num_insts: usize)

impl ToBackwardsInsnIndex for InsnIndex {
    fn to_backwards_insn_index(&self, num_insts: usize) -> BackwardsInsnIndex {
        BackwardsInsnIndex::new(num_insts - self.index() - 1)
    }
}

/// An index referring to an instruction in the VCode when it is backwards,