src/test/mir-opt/unreachable.main.UnreachablePropagation.diff

   1 - // MIR for `main` before UnreachablePropagation
   2 + // MIR for `main` after UnreachablePropagation
   3
   4   fn main() -> () {
   5       let mut _0: ();                      // return place in scope 0 at $DIR/unreachable.rs:+0:11: +0:11
   6       let mut _1: std::option::Option<Empty>; // in scope 0 at $DIR/unreachable.rs:+1:23: +1:30
   7       let mut _2: isize;                   // in scope 0 at $DIR/unreachable.rs:+1:12: +1:20
   8       let _5: ();                          // in scope 0 at $DIR/unreachable.rs:+4:9: +8:10
   9       let mut _6: bool;                    // in scope 0 at $DIR/unreachable.rs:+4:12: +4:16
  10       let mut _7: !;                       // in scope 0 at $DIR/unreachable.rs:+10:9: +10:21
  11       scope 1 {
  12           debug _x => _3;                  // in scope 1 at $DIR/unreachable.rs:+1:17: +1:19
  13           let _3: Empty;                   // in scope 1 at $DIR/unreachable.rs:+1:17: +1:19
  14           let mut _4: i32;                 // in scope 1 at $DIR/unreachable.rs:+2:13: +2:19
  15           scope 2 {
  16               debug _y => _4;              // in scope 2 at $DIR/unreachable.rs:+2:13: +2:19
  17           }
  18       }
  19
  20       bb0: {
  21           StorageLive(_1);                 // scope 1 at $DIR/unreachable.rs:+1:23: +1:30
  22           _1 = empty() -> bb1;             // scope 1 at $DIR/unreachable.rs:+1:23: +1:30
  23                                            // mir::Constant
  24                                            // + span: $DIR/unreachable.rs:9:23: 9:28
  25                                            // + literal: Const { ty: fn() -> Option<Empty> {empty}, val: Value(<ZST>) }
  26       }
  27
  28       bb1: {
  29           _2 = discriminant(_1);           // scope 1 at $DIR/unreachable.rs:+1:12: +1:20
  30 -         switchInt(move _2) -> [1_isize: bb2, otherwise: bb6]; // scope 1 at $DIR/unreachable.rs:+1:12: +1:20
  31 +         switchInt(move _2) -> [1_isize: bb2, otherwise: bb3]; // scope 1 at $DIR/unreachable.rs:+1:12: +1:20
  32       }
  33
  34       bb2: {
  35 -         StorageLive(_3);                 // scope 1 at $DIR/unreachable.rs:+1:17: +1:19
  36 -         _3 = move ((_1 as Some).0: Empty); // scope 1 at $DIR/unreachable.rs:+1:17: +1:19
  37 -         StorageLive(_4);                 // scope 1 at $DIR/unreachable.rs:+2:13: +2:19
  38 -         StorageLive(_5);                 // scope 2 at $DIR/unreachable.rs:+4:9: +8:10
  39 -         StorageLive(_6);                 // scope 2 at $DIR/unreachable.rs:+4:12: +4:16
  40 -         _6 = const true;                 // scope 2 at $DIR/unreachable.rs:+4:12: +4:16
  41 -         switchInt(move _6) -> [false: bb4, otherwise: bb3]; // scope 2 at $DIR/unreachable.rs:+4:12: +4:16
  42 +         unreachable;                     // scope 2 at $DIR/unreachable.rs:+4:12: +4:16
  43       }
  44
  45       bb3: {
  46 -         _4 = const 21_i32;               // scope 2 at $DIR/unreachable.rs:+5:13: +5:20
  47 -         _5 = const ();                   // scope 2 at $DIR/unreachable.rs:+4:17: +6:10
  48 -         goto -> bb5;                     // scope 2 at $DIR/unreachable.rs:+4:9: +8:10
  49 -     }
  50 -
  51 -     bb4: {
  52 -         _4 = const 42_i32;               // scope 2 at $DIR/unreachable.rs:+7:13: +7:20
  53 -         _5 = const ();                   // scope 2 at $DIR/unreachable.rs:+6:16: +8:10
  54 -         goto -> bb5;                     // scope 2 at $DIR/unreachable.rs:+4:9: +8:10
  55 -     }
  56 -
  57 -     bb5: {
  58 -         StorageDead(_6);                 // scope 2 at $DIR/unreachable.rs:+8:9: +8:10
  59 -         StorageDead(_5);                 // scope 2 at $DIR/unreachable.rs:+8:9: +8:10
  60 -         StorageLive(_7);                 // scope 2 at $DIR/unreachable.rs:+10:9: +10:21
  61 -         unreachable;                     // scope 2 at $DIR/unreachable.rs:+10:15: +10:17
  62 -     }
  63 -
  64 -     bb6: {
  65           _0 = const ();                   // scope 0 at $DIR/unreachable.rs:+11:6: +11:6
  66           StorageDead(_1);                 // scope 0 at $DIR/unreachable.rs:+12:1: +12:2
  67           return;                          // scope 0 at $DIR/unreachable.rs:+12:2: +12:2
  68       }
  69   }
  70