打印 MIR 的命令
cargo +nightly rustc -- -Z unpretty=mir
打印 enum 各个 variants 体积的命令
参考 https://nnethercote.github.io…
rustc +nightly -Zprint-type-sizes input.rs
cargo +nightly rustc -- -Z unpretty=mir
参考 https://nnethercote.github.io…
rustc +nightly -Zprint-type-sizes input.rs