- // MIR for `float_to_exponential_common` before GVN
+ // MIR for `float_to_exponential_common` after GVN
  
  fn float_to_exponential_common(_1: &mut Formatter<'_>, _2: &T, _3: bool) -> Result<(), std::fmt::Error> {
      debug fmt => _1;
      debug num => _2;
      debug upper => _3;
      let mut _0: std::result::Result<(), std::fmt::Error>;
      let _4: bool;
      let mut _6: std::option::Option<usize>;
      let mut _7: isize;
      let mut _9: &mut std::fmt::Formatter<'_>;
      let mut _10: &T;
      let mut _11: core::num::flt2dec::Sign;
      let mut _12: u32;
      let mut _13: u32;
      let mut _14: usize;
      let mut _15: bool;
      let mut _16: &mut std::fmt::Formatter<'_>;
      let mut _17: &T;
      let mut _18: core::num::flt2dec::Sign;
      let mut _19: bool;
      scope 1 {
          debug force_sign => _4;
          let _5: core::num::flt2dec::Sign;
          scope 2 {
              debug sign => _5;
              scope 3 {
                  debug precision => _8;
                  let _8: usize;
                  scope 5 (inlined Formatter::<'_>::precision) {
                  }
              }
          }
      }
      scope 4 (inlined Formatter::<'_>::sign_plus) {
          let mut _20: u32;
          let mut _21: u32;
      }
  
      bb0: {
          StorageLive(_4);
          StorageLive(_20);
          StorageLive(_21);
          _21 = copy ((*_1).0: u32);
          _20 = BitAnd(move _21, const 1_u32);
          StorageDead(_21);
          _4 = Ne(move _20, const 0_u32);
          StorageDead(_20);
          StorageLive(_5);
          switchInt(copy _4) -> [0: bb2, otherwise: bb1];
      }
  
      bb1: {
-         _5 = MinusPlus;
+         _5 = const MinusPlus;
          goto -> bb3;
      }
  
      bb2: {
-         _5 = Minus;
+         _5 = const Minus;
          goto -> bb3;
      }
  
      bb3: {
          StorageLive(_6);
          _6 = copy ((*_1).4: std::option::Option<usize>);
          _7 = discriminant(_6);
          switchInt(move _7) -> [1: bb4, 0: bb6, otherwise: bb9];
      }
  
      bb4: {
-         StorageLive(_8);
+         nop;
          _8 = copy ((_6 as Some).0: usize);
          StorageLive(_9);
          _9 = copy _1;
          StorageLive(_10);
          _10 = copy _2;
          StorageLive(_11);
          _11 = copy _5;
          StorageLive(_12);
          StorageLive(_13);
          StorageLive(_14);
          _14 = copy _8;
-         _13 = move _14 as u32 (IntToInt);
+         _13 = copy _8 as u32 (IntToInt);
          StorageDead(_14);
          _12 = Add(move _13, const 1_u32);
          StorageDead(_13);
          StorageLive(_15);
          _15 = copy _3;
-         _0 = float_to_exponential_common_exact::<T>(move _9, move _10, move _11, move _12, move _15) -> [return: bb5, unwind continue];
+         _0 = float_to_exponential_common_exact::<T>(copy _1, copy _2, move _11, move _12, copy _3) -> [return: bb5, unwind continue];
      }
  
      bb5: {
          StorageDead(_15);
          StorageDead(_12);
          StorageDead(_11);
          StorageDead(_10);
          StorageDead(_9);
-         StorageDead(_8);
+         nop;
          goto -> bb8;
      }
  
      bb6: {
          StorageLive(_16);
          _16 = copy _1;
          StorageLive(_17);
          _17 = copy _2;
          StorageLive(_18);
          _18 = copy _5;
          StorageLive(_19);
          _19 = copy _3;
-         _0 = float_to_exponential_common_shortest::<T>(move _16, move _17, move _18, move _19) -> [return: bb7, unwind continue];
+         _0 = float_to_exponential_common_shortest::<T>(copy _1, copy _2, move _18, copy _3) -> [return: bb7, unwind continue];
      }
  
      bb7: {
          StorageDead(_19);
          StorageDead(_18);
          StorageDead(_17);
          StorageDead(_16);
          goto -> bb8;
      }
  
      bb8: {
          StorageDead(_5);
          StorageDead(_4);
          StorageDead(_6);
          return;
      }
  
      bb9: {
          unreachable;
      }
  }