src/test/mir-opt/issue_62289.test.ElaborateDrops.before.mir

   1 // MIR for `test` before ElaborateDrops
   2
   3 fn test() -> Option<Box<u32>> {
   4     let mut _0: std::option::Option<std::boxed::Box<u32>>; // return place in scope 0 at $DIR/issue-62289.rs:+0:14: +0:30
   5     let mut _1: std::boxed::Box<u32>;    // in scope 0 at $DIR/issue-62289.rs:+1:10: +1:21
   6     let mut _2: usize;                   // in scope 0 at $DIR/issue-62289.rs:+1:10: +1:21
   7     let mut _3: usize;                   // in scope 0 at $DIR/issue-62289.rs:+1:10: +1:21
   8     let mut _4: *mut u8;                 // in scope 0 at $DIR/issue-62289.rs:+1:10: +1:21
   9     let mut _5: std::boxed::Box<u32>;    // in scope 0 at $DIR/issue-62289.rs:+1:10: +1:21
  10     let mut _6: std::ops::ControlFlow<std::option::Option<std::convert::Infallible>, u32>; // in scope 0 at $DIR/issue-62289.rs:+1:15: +1:20
  11     let mut _7: std::option::Option<u32>; // in scope 0 at $DIR/issue-62289.rs:+1:15: +1:19
  12     let mut _8: isize;                   // in scope 0 at $DIR/issue-62289.rs:+1:19: +1:20
  13     let _9: std::option::Option<std::convert::Infallible>; // in scope 0 at $DIR/issue-62289.rs:+1:19: +1:20
  14     let mut _10: !;                      // in scope 0 at $DIR/issue-62289.rs:+1:19: +1:20
  15     let mut _11: std::option::Option<std::convert::Infallible>; // in scope 0 at $DIR/issue-62289.rs:+1:19: +1:20
  16     let _12: u32;                        // in scope 0 at $DIR/issue-62289.rs:+1:15: +1:20
  17     scope 1 {
  18     }
  19     scope 2 {
  20         debug residual => _9;            // in scope 2 at $DIR/issue-62289.rs:+1:19: +1:20
  21         scope 3 {
  22         }
  23     }
  24     scope 4 {
  25         debug val => _12;                // in scope 4 at $DIR/issue-62289.rs:+1:15: +1:20
  26         scope 5 {
  27         }
  28     }
  29
  30     bb0: {
  31         StorageLive(_1);                 // scope 0 at $DIR/issue-62289.rs:+1:10: +1:21
  32         _2 = SizeOf(u32);                // scope 1 at $DIR/issue-62289.rs:+1:10: +1:21
  33         _3 = AlignOf(u32);               // scope 1 at $DIR/issue-62289.rs:+1:10: +1:21
  34         _4 = alloc::alloc::exchange_malloc(move _2, move _3) -> bb1; // scope 1 at $DIR/issue-62289.rs:+1:10: +1:21
  35                                          // mir::Constant
  36                                          // + span: $DIR/issue-62289.rs:9:10: 9:21
  37                                          // + literal: Const { ty: unsafe fn(usize, usize) -> *mut u8 {alloc::alloc::exchange_malloc}, val: Value(<ZST>) }
  38     }
  39
  40     bb1: {
  41         StorageLive(_5);                 // scope 0 at $DIR/issue-62289.rs:+1:10: +1:21
  42         _5 = ShallowInitBox(move _4, u32); // scope 0 at $DIR/issue-62289.rs:+1:10: +1:21
  43         StorageLive(_6);                 // scope 0 at $DIR/issue-62289.rs:+1:15: +1:20
  44         StorageLive(_7);                 // scope 0 at $DIR/issue-62289.rs:+1:15: +1:19
  45         _7 = Option::<u32>::None;        // scope 0 at $DIR/issue-62289.rs:+1:15: +1:19
  46         _6 = <Option<u32> as Try>::branch(move _7) -> [return: bb2, unwind: bb12]; // scope 0 at $DIR/issue-62289.rs:+1:15: +1:20
  47                                          // mir::Constant
  48                                          // + span: $DIR/issue-62289.rs:9:15: 9:20
  49                                          // + literal: Const { ty: fn(Option<u32>) -> ControlFlow<<Option<u32> as Try>::Residual, <Option<u32> as Try>::Output> {<Option<u32> as Try>::branch}, val: Value(<ZST>) }
  50     }
  51
  52     bb2: {
  53         StorageDead(_7);                 // scope 0 at $DIR/issue-62289.rs:+1:19: +1:20
  54         _8 = discriminant(_6);           // scope 0 at $DIR/issue-62289.rs:+1:15: +1:20
  55         switchInt(move _8) -> [0_isize: bb3, 1_isize: bb5, otherwise: bb4]; // scope 0 at $DIR/issue-62289.rs:+1:15: +1:20
  56     }
  57
  58     bb3: {
  59         StorageLive(_12);                // scope 0 at $DIR/issue-62289.rs:+1:15: +1:20
  60         _12 = ((_6 as Continue).0: u32); // scope 0 at $DIR/issue-62289.rs:+1:15: +1:20
  61         (*_5) = _12;                     // scope 5 at $DIR/issue-62289.rs:+1:15: +1:20
  62         StorageDead(_12);                // scope 0 at $DIR/issue-62289.rs:+1:19: +1:20
  63         _1 = move _5;                    // scope 0 at $DIR/issue-62289.rs:+1:10: +1:21
  64         drop(_5) -> [return: bb7, unwind: bb11]; // scope 0 at $DIR/issue-62289.rs:+1:20: +1:21
  65     }
  66
  67     bb4: {
  68         unreachable;                     // scope 0 at $DIR/issue-62289.rs:+1:15: +1:20
  69     }
  70
  71     bb5: {
  72         StorageLive(_9);                 // scope 0 at $DIR/issue-62289.rs:+1:19: +1:20
  73         _9 = ((_6 as Break).0: std::option::Option<std::convert::Infallible>); // scope 0 at $DIR/issue-62289.rs:+1:19: +1:20
  74         StorageLive(_11);                // scope 3 at $DIR/issue-62289.rs:+1:19: +1:20
  75         _11 = _9;                        // scope 3 at $DIR/issue-62289.rs:+1:19: +1:20
  76         _0 = <Option<Box<u32>> as FromResidual<Option<Infallible>>>::from_residual(move _11) -> [return: bb6, unwind: bb12]; // scope 3 at $DIR/issue-62289.rs:+1:15: +1:20
  77                                          // mir::Constant
  78                                          // + span: $DIR/issue-62289.rs:9:19: 9:20
  79                                          // + literal: Const { ty: fn(Option<Infallible>) -> Option<Box<u32>> {<Option<Box<u32>> as FromResidual<Option<Infallible>>>::from_residual}, val: Value(<ZST>) }
  80     }
  81
  82     bb6: {
  83         StorageDead(_11);                // scope 3 at $DIR/issue-62289.rs:+1:19: +1:20
  84         StorageDead(_9);                 // scope 0 at $DIR/issue-62289.rs:+1:19: +1:20
  85         drop(_5) -> bb9;                 // scope 0 at $DIR/issue-62289.rs:+1:20: +1:21
  86     }
  87
  88     bb7: {
  89         StorageDead(_5);                 // scope 0 at $DIR/issue-62289.rs:+1:20: +1:21
  90         _0 = Option::<Box<u32>>::Some(move _1); // scope 0 at $DIR/issue-62289.rs:+1:5: +1:22
  91         drop(_1) -> bb8;                 // scope 0 at $DIR/issue-62289.rs:+1:21: +1:22
  92     }
  93
  94     bb8: {
  95         StorageDead(_1);                 // scope 0 at $DIR/issue-62289.rs:+1:21: +1:22
  96         StorageDead(_6);                 // scope 0 at $DIR/issue-62289.rs:+2:1: +2:2
  97         goto -> bb10;                    // scope 0 at $DIR/issue-62289.rs:+2:2: +2:2
  98     }
  99
 100     bb9: {
 101         StorageDead(_5);                 // scope 0 at $DIR/issue-62289.rs:+1:20: +1:21
 102         StorageDead(_1);                 // scope 0 at $DIR/issue-62289.rs:+1:21: +1:22
 103         StorageDead(_6);                 // scope 0 at $DIR/issue-62289.rs:+2:1: +2:2
 104         goto -> bb10;                    // scope 0 at $DIR/issue-62289.rs:+2:2: +2:2
 105     }
 106
 107     bb10: {
 108         return;                          // scope 0 at $DIR/issue-62289.rs:+2:2: +2:2
 109     }
 110
 111     bb11 (cleanup): {
 112         drop(_1) -> bb13;                // scope 0 at $DIR/issue-62289.rs:+1:21: +1:22
 113     }
 114
 115     bb12 (cleanup): {
 116         drop(_5) -> bb13;                // scope 0 at $DIR/issue-62289.rs:+1:20: +1:21
 117     }
 118
 119     bb13 (cleanup): {
 120         resume;                          // scope 0 at $DIR/issue-62289.rs:+0:1: +2:2
 121     }
 122 }