src/test/mir-opt/issue-62289/rustc.test.ElaborateDrops.before.mir

   1 // MIR for `test` before ElaborateDrops
   2
   3 fn test() -> std::option::Option<std::boxed::Box<u32>> {
   4     let mut _0: std::option::Option<std::boxed::Box<u32>>; // return place in scope 0 at $DIR/issue-62289.rs:8:14: 8:30
   5     let mut _1: std::boxed::Box<u32>;    // in scope 0 at $DIR/issue-62289.rs:9:10: 9:21
   6     let mut _2: std::boxed::Box<u32>;    // in scope 0 at $DIR/issue-62289.rs:9:10: 9:21
   7     let mut _3: std::result::Result<u32, std::option::NoneError>; // in scope 0 at $DIR/issue-62289.rs:9:15: 9:20
   8     let mut _4: std::option::Option<u32>; // in scope 0 at $DIR/issue-62289.rs:9:15: 9:19
   9     let mut _5: isize;                   // in scope 0 at $DIR/issue-62289.rs:9:19: 9:20
  10     let _6: std::option::NoneError;      // in scope 0 at $DIR/issue-62289.rs:9:19: 9:20
  11     let mut _7: !;                       // in scope 0 at $DIR/issue-62289.rs:9:19: 9:20
  12     let mut _8: std::option::NoneError;  // in scope 0 at $DIR/issue-62289.rs:9:19: 9:20
  13     let mut _9: std::option::NoneError;  // in scope 0 at $DIR/issue-62289.rs:9:19: 9:20
  14     let _10: u32;                        // in scope 0 at $DIR/issue-62289.rs:9:15: 9:20
  15     scope 1 {
  16         debug err => _6;                 // in scope 1 at $DIR/issue-62289.rs:9:19: 9:20
  17         scope 2 {
  18         }
  19     }
  20     scope 3 {
  21         debug val => _10;                // in scope 3 at $DIR/issue-62289.rs:9:15: 9:20
  22         scope 4 {
  23         }
  24     }
  25
  26     bb0: {
  27         StorageLive(_1);                 // scope 0 at $DIR/issue-62289.rs:9:10: 9:21
  28         StorageLive(_2);                 // scope 0 at $DIR/issue-62289.rs:9:10: 9:21
  29         _2 = Box(u32);                   // scope 0 at $DIR/issue-62289.rs:9:10: 9:21
  30         StorageLive(_3);                 // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
  31         StorageLive(_4);                 // scope 0 at $DIR/issue-62289.rs:9:15: 9:19
  32         _4 = std::option::Option::<u32>::None; // scope 0 at $DIR/issue-62289.rs:9:15: 9:19
  33         _3 = const <std::option::Option<u32> as std::ops::Try>::into_result(move _4) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
  34                                          // ty::Const
  35                                          // + ty: fn(std::option::Option<u32>) -> std::result::Result<<std::option::Option<u32> as std::ops::Try>::Ok, <std::option::Option<u32> as std::ops::Try>::Error> {<std::option::Option<u32> as std::ops::Try>::into_result}
  36                                          // + val: Value(Scalar(<ZST>))
  37                                          // mir::Constant
  38                                          // + span: $DIR/issue-62289.rs:9:15: 9:20
  39                                          // + literal: Const { ty: fn(std::option::Option<u32>) -> std::result::Result<<std::option::Option<u32> as std::ops::Try>::Ok, <std::option::Option<u32> as std::ops::Try>::Error> {<std::option::Option<u32> as std::ops::Try>::into_result}, val: Value(Scalar(<ZST>)) }
  40     }
  41
  42     bb1 (cleanup): {
  43         resume;                          // scope 0 at $DIR/issue-62289.rs:8:1: 10:2
  44     }
  45
  46     bb2: {
  47         StorageDead(_4);                 // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
  48         _5 = discriminant(_3);           // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
  49         switchInt(move _5) -> [0isize: bb4, 1isize: bb6, otherwise: bb5]; // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
  50     }
  51
  52     bb3 (cleanup): {
  53         drop(_2) -> bb1;                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
  54     }
  55
  56     bb4: {
  57         StorageLive(_10);                // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
  58         _10 = ((_3 as Ok).0: u32);       // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
  59         (*_2) = _10;                     // scope 4 at $DIR/issue-62289.rs:9:15: 9:20
  60         StorageDead(_10);                // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
  61         _1 = move _2;                    // scope 0 at $DIR/issue-62289.rs:9:10: 9:21
  62         drop(_2) -> [return: bb12, unwind: bb11]; // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
  63     }
  64
  65     bb5: {
  66         unreachable;                     // scope 0 at $DIR/issue-62289.rs:9:15: 9:20
  67     }
  68
  69     bb6: {
  70         StorageLive(_6);                 // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
  71         _6 = ((_3 as Err).0: std::option::NoneError); // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
  72         StorageLive(_8);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
  73         StorageLive(_9);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
  74         _9 = _6;                         // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
  75         _8 = const <std::option::NoneError as std::convert::From<std::option::NoneError>>::from(move _9) -> [return: bb8, unwind: bb3]; // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
  76                                          // ty::Const
  77                                          // + ty: fn(std::option::NoneError) -> std::option::NoneError {<std::option::NoneError as std::convert::From<std::option::NoneError>>::from}
  78                                          // + val: Value(Scalar(<ZST>))
  79                                          // mir::Constant
  80                                          // + span: $DIR/issue-62289.rs:9:19: 9:20
  81                                          // + literal: Const { ty: fn(std::option::NoneError) -> std::option::NoneError {<std::option::NoneError as std::convert::From<std::option::NoneError>>::from}, val: Value(Scalar(<ZST>)) }
  82     }
  83
  84     bb7: {
  85         return;                          // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
  86     }
  87
  88     bb8: {
  89         StorageDead(_9);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
  90         _0 = const <std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::from_error(move _8) -> [return: bb9, unwind: bb3]; // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
  91                                          // ty::Const
  92                                          // + ty: fn(<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::Error) -> std::option::Option<std::boxed::Box<u32>> {<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::from_error}
  93                                          // + val: Value(Scalar(<ZST>))
  94                                          // mir::Constant
  95                                          // + span: $DIR/issue-62289.rs:9:15: 9:20
  96                                          // + literal: Const { ty: fn(<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::Error) -> std::option::Option<std::boxed::Box<u32>> {<std::option::Option<std::boxed::Box<u32>> as std::ops::Try>::from_error}, val: Value(Scalar(<ZST>)) }
  97     }
  98
  99     bb9: {
 100         StorageDead(_8);                 // scope 2 at $DIR/issue-62289.rs:9:19: 9:20
 101         StorageDead(_6);                 // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
 102         drop(_2) -> bb10;                // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
 103     }
 104
 105     bb10: {
 106         StorageDead(_2);                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
 107         StorageDead(_1);                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
 108         StorageDead(_3);                 // scope 0 at $DIR/issue-62289.rs:10:1: 10:2
 109         goto -> bb7;                     // scope 0 at $DIR/issue-62289.rs:9:19: 9:20
 110     }
 111
 112     bb11 (cleanup): {
 113         drop(_1) -> bb1;                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
 114     }
 115
 116     bb12: {
 117         StorageDead(_2);                 // scope 0 at $DIR/issue-62289.rs:9:20: 9:21
 118         _0 = std::option::Option::<std::boxed::Box<u32>>::Some(move _1); // scope 0 at $DIR/issue-62289.rs:9:5: 9:22
 119         drop(_1) -> bb13;                // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
 120     }
 121
 122     bb13: {
 123         StorageDead(_1);                 // scope 0 at $DIR/issue-62289.rs:9:21: 9:22
 124         StorageDead(_3);                 // scope 0 at $DIR/issue-62289.rs:10:1: 10:2
 125         goto -> bb7;                     // scope 0 at $DIR/issue-62289.rs:10:2: 10:2
 126     }
 127 }