- // MIR for `multiple` before DataflowConstProp
+ // MIR for `multiple` after DataflowConstProp
  
  fn multiple(_1: bool, _2: u8) -> () {
      debug x => _1;                       // in scope 0 at $DIR/enum.rs:+0:13: +0:14
      debug i => _2;                       // in scope 0 at $DIR/enum.rs:+0:22: +0:23
      let mut _0: ();                      // return place in scope 0 at $DIR/enum.rs:+0:29: +0:29
      let _3: std::option::Option<u8>;     // in scope 0 at $DIR/enum.rs:+1:9: +1:10
      let mut _4: bool;                    // in scope 0 at $DIR/enum.rs:+1:16: +1:17
      let mut _5: u8;                      // in scope 0 at $DIR/enum.rs:+2:14: +2:15
      let mut _7: isize;                   // in scope 0 at $DIR/enum.rs:+9:23: +9:30
      scope 1 {
          debug e => _3;                   // in scope 1 at $DIR/enum.rs:+1:9: +1:10
          let _6: u8;                      // in scope 1 at $DIR/enum.rs:+9:9: +9:10
          let _8: u8;                      // in scope 1 at $DIR/enum.rs:+9:28: +9:29
          scope 2 {
              debug x => _6;               // in scope 2 at $DIR/enum.rs:+9:9: +9:10
              let _9: u8;                  // in scope 2 at $DIR/enum.rs:+11:9: +11:10
              scope 4 {
                  debug y => _9;           // in scope 4 at $DIR/enum.rs:+11:9: +11:10
              }
          }
          scope 3 {
              debug i => _8;               // in scope 3 at $DIR/enum.rs:+9:28: +9:29
          }
      }
  
      bb0: {
          StorageLive(_3);                 // scope 0 at $DIR/enum.rs:+1:9: +1:10
          StorageLive(_4);                 // scope 0 at $DIR/enum.rs:+1:16: +1:17
          _4 = _1;                         // scope 0 at $DIR/enum.rs:+1:16: +1:17
          switchInt(move _4) -> [0: bb2, otherwise: bb1]; // scope 0 at $DIR/enum.rs:+1:16: +1:17
      }
  
      bb1: {
          StorageLive(_5);                 // scope 0 at $DIR/enum.rs:+2:14: +2:15
          _5 = _2;                         // scope 0 at $DIR/enum.rs:+2:14: +2:15
          _3 = Option::<u8>::Some(move _5); // scope 0 at $DIR/enum.rs:+2:9: +2:16
          StorageDead(_5);                 // scope 0 at $DIR/enum.rs:+2:15: +2:16
          goto -> bb3;                     // scope 0 at $DIR/enum.rs:+1:13: +5:6
      }
  
      bb2: {
          _3 = Option::<u8>::None;         // scope 0 at $DIR/enum.rs:+4:9: +4:13
          goto -> bb3;                     // scope 0 at $DIR/enum.rs:+1:13: +5:6
      }
  
      bb3: {
          StorageDead(_4);                 // scope 0 at $DIR/enum.rs:+5:5: +5:6
          StorageLive(_6);                 // scope 1 at $DIR/enum.rs:+9:9: +9:10
          _7 = discriminant(_3);           // scope 1 at $DIR/enum.rs:+9:19: +9:20
          switchInt(move _7) -> [0: bb4, 1: bb6, otherwise: bb5]; // scope 1 at $DIR/enum.rs:+9:13: +9:20
      }
  
      bb4: {
          _6 = const 0_u8;                 // scope 1 at $DIR/enum.rs:+9:45: +9:46
          goto -> bb7;                     // scope 1 at $DIR/enum.rs:+9:45: +9:46
      }
  
      bb5: {
          unreachable;                     // scope 1 at $DIR/enum.rs:+9:19: +9:20
      }
  
      bb6: {
          StorageLive(_8);                 // scope 1 at $DIR/enum.rs:+9:28: +9:29
          _8 = ((_3 as Some).0: u8);       // scope 1 at $DIR/enum.rs:+9:28: +9:29
          _6 = _8;                         // scope 3 at $DIR/enum.rs:+9:34: +9:35
          StorageDead(_8);                 // scope 1 at $DIR/enum.rs:+9:34: +9:35
          goto -> bb7;                     // scope 1 at $DIR/enum.rs:+9:34: +9:35
      }
  
      bb7: {
          StorageLive(_9);                 // scope 2 at $DIR/enum.rs:+11:9: +11:10
          _9 = _6;                         // scope 2 at $DIR/enum.rs:+11:13: +11:14
          _0 = const ();                   // scope 0 at $DIR/enum.rs:+0:29: +12:2
          StorageDead(_9);                 // scope 2 at $DIR/enum.rs:+12:1: +12:2
          StorageDead(_6);                 // scope 1 at $DIR/enum.rs:+12:1: +12:2
          StorageDead(_3);                 // scope 0 at $DIR/enum.rs:+12:1: +12:2
          return;                          // scope 0 at $DIR/enum.rs:+12:2: +12:2
      }
  }