mirror of https://github.com/rust-lang/rust
113 lines
2.6 KiB
Rust
113 lines
2.6 KiB
Rust
// MIR for `test` before ElaborateDrops
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fn test() -> Option<Box<u32>> {
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let mut _0: std::option::Option<std::boxed::Box<u32>>;
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let mut _1: std::boxed::Box<u32>;
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let mut _2: usize;
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let mut _3: usize;
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let mut _4: *mut u8;
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let mut _5: std::boxed::Box<u32>;
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let mut _6: std::ops::ControlFlow<std::option::Option<std::convert::Infallible>, u32>;
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let mut _7: std::option::Option<u32>;
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let mut _8: isize;
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let _9: std::option::Option<std::convert::Infallible>;
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let mut _10: !;
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let mut _11: std::option::Option<std::convert::Infallible>;
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let _12: u32;
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scope 1 {
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debug residual => _9;
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scope 2 {
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}
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}
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scope 3 {
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debug val => _12;
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scope 4 {
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}
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}
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bb0: {
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StorageLive(_1);
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_2 = SizeOf(u32);
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_3 = AlignOf(u32);
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_4 = alloc::alloc::exchange_malloc(move _2, move _3) -> [return: bb1, unwind: bb13];
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}
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bb1: {
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StorageLive(_5);
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_5 = ShallowInitBox(move _4, u32);
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StorageLive(_6);
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StorageLive(_7);
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_7 = Option::<u32>::None;
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_6 = <Option<u32> as Try>::branch(move _7) -> [return: bb2, unwind: bb12];
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}
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bb2: {
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StorageDead(_7);
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PlaceMention(_6);
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_8 = discriminant(_6);
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switchInt(move _8) -> [0: bb4, 1: bb5, otherwise: bb3];
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}
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bb3: {
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unreachable;
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}
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bb4: {
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StorageLive(_12);
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_12 = ((_6 as Continue).0: u32);
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(*_5) = _12;
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StorageDead(_12);
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_1 = move _5;
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drop(_5) -> [return: bb7, unwind: bb11];
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}
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bb5: {
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StorageLive(_9);
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_9 = ((_6 as Break).0: std::option::Option<std::convert::Infallible>);
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StorageLive(_11);
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_11 = _9;
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_0 = <Option<Box<u32>> as FromResidual<Option<Infallible>>>::from_residual(move _11) -> [return: bb6, unwind: bb12];
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}
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bb6: {
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StorageDead(_11);
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StorageDead(_9);
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drop(_5) -> [return: bb9, unwind: bb13];
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}
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bb7: {
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StorageDead(_5);
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_0 = Option::<Box<u32>>::Some(move _1);
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drop(_1) -> [return: bb8, unwind: bb13];
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}
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bb8: {
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StorageDead(_1);
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StorageDead(_6);
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goto -> bb10;
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}
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bb9: {
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StorageDead(_5);
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StorageDead(_1);
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StorageDead(_6);
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goto -> bb10;
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}
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bb10: {
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return;
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}
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bb11 (cleanup): {
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drop(_1) -> [return: bb13, unwind terminate(cleanup)];
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}
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bb12 (cleanup): {
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drop(_5) -> [return: bb13, unwind terminate(cleanup)];
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}
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bb13 (cleanup): {
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resume;
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}
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}
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