ref_of_deref.references.InstSimplify-after-simplifycfg.diff

- // MIR for `references` before InstSimplify-after-simplifycfg
+ // MIR for `references` after InstSimplify-after-simplifycfg
  
  fn references(_1: &i32, _2: &mut [i32]) -> () {
      debug const_ref => _1;
      debug mut_ref => _2;
      let mut _0: ();
      let _3: &i32;
      scope 1 {
          debug _a => _3;
          let _4: &[i32];
          scope 2 {
              debug _b => _4;
              let _5: &mut [i32];
              scope 3 {
                  debug _c => _5;
                  let _6: *const i32;
                  scope 4 {
                      debug _d => _6;
                      let _7: *const [i32];
                      scope 5 {
                          debug _e => _7;
                          let _8: *mut [i32];
                          scope 6 {
                              debug _f => _8;
                          }
                      }
                  }
              }
          }
      }
  
      bb0: {
          StorageLive(_3);
-         _3 = &(*_1);
+         _3 = copy _1;
          StorageLive(_4);
          _4 = &(*_2);
          StorageLive(_5);
-         _5 = &mut (*_2);
+         _5 = copy _2;
          StorageLive(_6);
          _6 = &raw const (*_1);
          StorageLive(_7);
          _7 = &raw const (*_2);
          StorageLive(_8);
          _8 = &raw mut (*_2);
          _0 = const ();
          StorageDead(_8);
          StorageDead(_7);
          StorageDead(_6);
          StorageDead(_5);
          StorageDead(_4);
          StorageDead(_3);
          return;
      }
  }