- // MIR for `f` before CopyProp
+ // MIR for `f` after CopyProp
  
  fn f(_1: NotCopy) -> () {
      let mut _0: ();                      // return place in scope 0 at $DIR/custom_move_arg.rs:+0:19: +0:19
      let mut _2: NotCopy;                 // in scope 0 at $SRC_DIR/core/src/intrinsics/mir.rs:LL:COL
      let mut _3: NotCopy;                 // in scope 0 at $SRC_DIR/core/src/intrinsics/mir.rs:LL:COL
  
      bb0: {
-         _2 = _1;                         // scope 0 at $SRC_DIR/core/src/intrinsics/mir.rs:LL:COL
-         _0 = opaque::<NotCopy>(move _1) -> bb1; // scope 0 at $DIR/custom_move_arg.rs:+3:9: +3:41
+         _0 = opaque::<NotCopy>(_1) -> bb1; // scope 0 at $DIR/custom_move_arg.rs:+3:9: +3:41
                                           // mir::Constant
                                           // + span: $DIR/custom_move_arg.rs:15:24: 15:30
                                           // + literal: Const { ty: fn(NotCopy) {opaque::<NotCopy>}, val: Value(<ZST>) }
      }
  
      bb1: {
-         _3 = move _2;                    // scope 0 at $SRC_DIR/core/src/intrinsics/mir.rs:LL:COL
-         _0 = opaque::<NotCopy>(_3) -> bb2; // scope 0 at $DIR/custom_move_arg.rs:+7:9: +7:35
+         _0 = opaque::<NotCopy>(_1) -> bb2; // scope 0 at $DIR/custom_move_arg.rs:+7:9: +7:35
                                           // mir::Constant
                                           // + span: $DIR/custom_move_arg.rs:19:24: 19:30
                                           // + literal: Const { ty: fn(NotCopy) {opaque::<NotCopy>}, val: Value(<ZST>) }
      }
  
      bb2: {
          return;                          // scope 0 at $DIR/custom_move_arg.rs:+10:9: +10:17
      }
  }