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