- // MIR for `main` before DataflowConstProp
+ // MIR for `main` after DataflowConstProp
  
  fn main() -> () {
      let mut _0: ();                      // return place in scope 0 at $DIR/terminator.rs:+0:11: +0:11
      let _1: i32;                         // in scope 0 at $DIR/terminator.rs:+1:9: +1:10
      let _2: ();                          // in scope 0 at $DIR/terminator.rs:+3:5: +3:15
      let mut _3: i32;                     // in scope 0 at $DIR/terminator.rs:+3:9: +3:14
      let mut _4: i32;                     // in scope 0 at $DIR/terminator.rs:+3:9: +3:10
      scope 1 {
          debug a => _1;                   // in scope 1 at $DIR/terminator.rs:+1:9: +1:10
      }
  
      bb0: {
          StorageLive(_1);                 // scope 0 at $DIR/terminator.rs:+1:9: +1:10
          _1 = const 1_i32;                // scope 0 at $DIR/terminator.rs:+1:13: +1:14
          StorageLive(_2);                 // scope 1 at $DIR/terminator.rs:+3:5: +3:15
          StorageLive(_3);                 // scope 1 at $DIR/terminator.rs:+3:9: +3:14
          StorageLive(_4);                 // scope 1 at $DIR/terminator.rs:+3:9: +3:10
-         _4 = _1;                         // scope 1 at $DIR/terminator.rs:+3:9: +3:10
-         _3 = Add(move _4, const 1_i32);  // scope 1 at $DIR/terminator.rs:+3:9: +3:14
+         _4 = const 1_i32;                // scope 1 at $DIR/terminator.rs:+3:9: +3:10
+         _3 = const 2_i32;                // scope 1 at $DIR/terminator.rs:+3:9: +3:14
          StorageDead(_4);                 // scope 1 at $DIR/terminator.rs:+3:13: +3:14
-         _2 = foo(move _3) -> bb1;        // scope 1 at $DIR/terminator.rs:+3:5: +3:15
+         _2 = foo(const 2_i32) -> bb1;    // scope 1 at $DIR/terminator.rs:+3:5: +3:15
                                           // mir::Constant
                                           // + span: $DIR/terminator.rs:9:5: 9:8
                                           // + literal: Const { ty: fn(i32) {foo}, val: Value(<ZST>) }
      }
  
      bb1: {
          StorageDead(_3);                 // scope 1 at $DIR/terminator.rs:+3:14: +3:15
          StorageDead(_2);                 // scope 1 at $DIR/terminator.rs:+3:15: +3:16
          _0 = const ();                   // scope 0 at $DIR/terminator.rs:+0:11: +4:2
          StorageDead(_1);                 // scope 0 at $DIR/terminator.rs:+4:1: +4:2
          return;                          // scope 0 at $DIR/terminator.rs:+4:2: +4:2
      }
  }