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- // MIR for `f` before DestinationPropagation
+ // MIR for `f` after DestinationPropagation
  
  fn f(_1: T) -> () {
      debug a => _1;                       // in scope 0 at $DIR/unreachable.rs:+0:19: +0:20
      let mut _0: ();                      // return place in scope 0 at $DIR/unreachable.rs:+0:25: +0:25
      let _2: T;                           // in scope 0 at $DIR/unreachable.rs:+1:9: +1:10
      let mut _3: bool;                    // in scope 0 at $DIR/unreachable.rs:+2:8: +2:13
      let _4: ();                          // in scope 0 at $DIR/unreachable.rs:+3:9: +3:16
      let mut _5: T;                       // in scope 0 at $DIR/unreachable.rs:+3:11: +3:12
      let mut _6: T;                       // in scope 0 at $DIR/unreachable.rs:+3:14: +3:15
      let _7: ();                          // in scope 0 at $DIR/unreachable.rs:+5:9: +5:16
      let mut _8: T;                       // in scope 0 at $DIR/unreachable.rs:+5:11: +5:12
      let mut _9: T;                       // in scope 0 at $DIR/unreachable.rs:+5:14: +5:15
      scope 1 {
-         debug b => _2;                   // in scope 1 at $DIR/unreachable.rs:+1:9: +1:10
+         debug b => _1;                   // in scope 1 at $DIR/unreachable.rs:+1:9: +1:10
      }
  
      bb0: {
-         StorageLive(_2);                 // scope 0 at $DIR/unreachable.rs:+1:9: +1:10
-         _2 = _1;                         // scope 0 at $DIR/unreachable.rs:+1:13: +1:14
+         nop;                             // scope 0 at $DIR/unreachable.rs:+1:9: +1:10
+         nop;                             // scope 0 at $DIR/unreachable.rs:+1:13: +1:14
          StorageLive(_3);                 // scope 1 at $DIR/unreachable.rs:+2:8: +2:13
          _3 = const false;                // scope 1 at $DIR/unreachable.rs:+2:8: +2:13
-         goto -> bb3;                     // scope 1 at $DIR/unreachable.rs:+2:8: +2:13
+         goto -> bb1;                     // scope 1 at $DIR/unreachable.rs:+2:8: +2:13
      }
  
      bb1: {
-         StorageLive(_4);                 // scope 1 at $DIR/unreachable.rs:+3:9: +3:16
-         StorageLive(_5);                 // scope 1 at $DIR/unreachable.rs:+3:11: +3:12
-         _5 = _1;                         // scope 1 at $DIR/unreachable.rs:+3:11: +3:12
-         StorageLive(_6);                 // scope 1 at $DIR/unreachable.rs:+3:14: +3:15
-         _6 = _2;                         // scope 1 at $DIR/unreachable.rs:+3:14: +3:15
-         _4 = g::<T>(move _5, move _6) -> bb2; // scope 1 at $DIR/unreachable.rs:+3:9: +3:16
-                                          // mir::Constant
-                                          // + span: $DIR/unreachable.rs:12:9: 12:10
-                                          // + literal: Const { ty: fn(T, T) {g::<T>}, val: Value(<ZST>) }
-     }
- 
-     bb2: {
-         StorageDead(_6);                 // scope 1 at $DIR/unreachable.rs:+3:15: +3:16
-         StorageDead(_5);                 // scope 1 at $DIR/unreachable.rs:+3:15: +3:16
-         StorageDead(_4);                 // scope 1 at $DIR/unreachable.rs:+3:16: +3:17
-         _0 = const ();                   // scope 1 at $DIR/unreachable.rs:+2:14: +4:6
-         goto -> bb5;                     // scope 1 at $DIR/unreachable.rs:+2:5: +6:6
-     }
- 
-     bb3: {
          StorageLive(_7);                 // scope 1 at $DIR/unreachable.rs:+5:9: +5:16
-         StorageLive(_8);                 // scope 1 at $DIR/unreachable.rs:+5:11: +5:12
-         _8 = _2;                         // scope 1 at $DIR/unreachable.rs:+5:11: +5:12
+         nop;                             // scope 1 at $DIR/unreachable.rs:+5:11: +5:12
+         nop;                             // scope 1 at $DIR/unreachable.rs:+5:11: +5:12
          StorageLive(_9);                 // scope 1 at $DIR/unreachable.rs:+5:14: +5:15
-         _9 = _2;                         // scope 1 at $DIR/unreachable.rs:+5:14: +5:15
-         _7 = g::<T>(move _8, move _9) -> bb4; // scope 1 at $DIR/unreachable.rs:+5:9: +5:16
+         _9 = _1;                         // scope 1 at $DIR/unreachable.rs:+5:14: +5:15
+         _7 = g::<T>(move _1, move _9) -> bb2; // scope 1 at $DIR/unreachable.rs:+5:9: +5:16
                                           // mir::Constant
                                           // + span: $DIR/unreachable.rs:14:9: 14:10
                                           // + literal: Const { ty: fn(T, T) {g::<T>}, val: Value(<ZST>) }
      }
  
-     bb4: {
+     bb2: {
          StorageDead(_9);                 // scope 1 at $DIR/unreachable.rs:+5:15: +5:16
-         StorageDead(_8);                 // scope 1 at $DIR/unreachable.rs:+5:15: +5:16
+         nop;                             // scope 1 at $DIR/unreachable.rs:+5:15: +5:16
          StorageDead(_7);                 // scope 1 at $DIR/unreachable.rs:+5:16: +5:17
          _0 = const ();                   // scope 1 at $DIR/unreachable.rs:+4:12: +6:6
-         goto -> bb5;                     // scope 1 at $DIR/unreachable.rs:+2:5: +6:6
+         goto -> bb3;                     // scope 1 at $DIR/unreachable.rs:+2:5: +6:6
      }
  
-     bb5: {
+     bb3: {
          StorageDead(_3);                 // scope 1 at $DIR/unreachable.rs:+6:5: +6:6
-         StorageDead(_2);                 // scope 0 at $DIR/unreachable.rs:+7:1: +7:2
+         nop;                             // scope 0 at $DIR/unreachable.rs:+7:1: +7:2
          return;                          // scope 0 at $DIR/unreachable.rs:+7:2: +7:2
      }
  }