- // MIR for `f` before DestinationPropagation
+ // MIR for `f` after DestinationPropagation
  
  fn f(_1: T) -> () {
      debug a => _1;
      let mut _0: ();
      let _2: T;
      let mut _3: bool;
      let _4: ();
      let mut _5: T;
      let mut _6: T;
      let _7: ();
      let mut _8: T;
      let mut _9: T;
      scope 1 {
-         debug b => _2;
+         debug b => _1;
      }
  
      bb0: {
-         StorageLive(_2);
-         _2 = _1;
+         nop;
+         nop;
          StorageLive(_3);
          _3 = const false;
-         goto -> bb3;
+         goto -> bb1;
      }
  
      bb1: {
-         StorageLive(_4);
-         StorageLive(_5);
-         _5 = _1;
-         StorageLive(_6);
-         _6 = _2;
-         _4 = g::<T>(move _5, move _6) -> [return: bb2, unwind unreachable];
-     }
- 
-     bb2: {
-         StorageDead(_6);
-         StorageDead(_5);
-         StorageDead(_4);
-         _0 = const ();
-         goto -> bb5;
-     }
- 
-     bb3: {
          StorageLive(_7);
-         StorageLive(_8);
-         _8 = _2;
+         nop;
+         nop;
          StorageLive(_9);
-         _9 = _2;
-         _7 = g::<T>(move _8, move _9) -> [return: bb4, unwind unreachable];
+         _9 = _1;
+         _7 = g::<T>(move _1, move _9) -> [return: bb2, unwind unreachable];
      }
  
-     bb4: {
+     bb2: {
          StorageDead(_9);
-         StorageDead(_8);
+         nop;
          StorageDead(_7);
          _0 = const ();
-         goto -> bb5;
+         goto -> bb3;
      }
  
-     bb5: {
+     bb3: {
          StorageDead(_3);
-         StorageDead(_2);
+         nop;
          return;
      }
  }