src/test/mir-opt/const_prop/ref_deref/rustc.main.PromoteTemps.diff

   1 - // MIR for `main` before PromoteTemps
   2 + // MIR for `main` after PromoteTemps
   3
   4   fn main() -> () {
   5       let mut _0: ();                      // return place in scope 0 at $DIR/ref_deref.rs:4:11: 4:11
   6       let _1: i32;                         // in scope 0 at $DIR/ref_deref.rs:5:5: 5:10
   7       let mut _2: &i32;                    // in scope 0 at $DIR/ref_deref.rs:5:6: 5:10
   8       let _3: i32;                         // in scope 0 at $DIR/ref_deref.rs:5:8: 5:9
   9 +     let mut _4: &i32;                    // in scope 0 at $DIR/ref_deref.rs:5:6: 5:10
  10
  11       bb0: {
  12           StorageLive(_1);                 // scope 0 at $DIR/ref_deref.rs:5:5: 5:10
  13           StorageLive(_2);                 // scope 0 at $DIR/ref_deref.rs:5:6: 5:10
  14 -         StorageLive(_3);                 // scope 0 at $DIR/ref_deref.rs:5:8: 5:9
  15 -         _3 = const 4_i32;                // scope 0 at $DIR/ref_deref.rs:5:8: 5:9
  16 +         _4 = const main::promoted[0];    // scope 0 at $DIR/ref_deref.rs:5:6: 5:10
  17                                            // ty::Const
  18 -                                          // + ty: i32
  19 -                                          // + val: Value(Scalar(0x00000004))
  20 +                                          // + ty: &i32
  21 +                                          // + val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ ref_deref[317d]::main[0]), const_param_did: None }, [], Some(promoted[0]))
  22                                            // mir::Constant
  23 -                                          // + span: $DIR/ref_deref.rs:5:8: 5:9
  24 -                                          // + literal: Const { ty: i32, val: Value(Scalar(0x00000004)) }
  25 -         _2 = &_3;                        // scope 0 at $DIR/ref_deref.rs:5:6: 5:10
  26 +                                          // + span: $DIR/ref_deref.rs:5:6: 5:10
  27 +                                          // + literal: Const { ty: &i32, val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ ref_deref[317d]::main[0]), const_param_did: None }, [], Some(promoted[0])) }
  28 +         _2 = &(*_4);                     // scope 0 at $DIR/ref_deref.rs:5:6: 5:10
  29           _1 = (*_2);                      // scope 0 at $DIR/ref_deref.rs:5:5: 5:10
  30 -         StorageDead(_3);                 // scope 0 at $DIR/ref_deref.rs:5:10: 5:11
  31           StorageDead(_2);                 // scope 0 at $DIR/ref_deref.rs:5:10: 5:11
  32           StorageDead(_1);                 // scope 0 at $DIR/ref_deref.rs:5:10: 5:11
  33           _0 = const ();                   // scope 0 at $DIR/ref_deref.rs:4:11: 6:2
  34                                            // ty::Const
  35                                            // + ty: ()
  36                                            // + val: Value(Scalar(<ZST>))
  37                                            // mir::Constant
  38                                            // + span: $DIR/ref_deref.rs:4:11: 6:2
  39                                            // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
  40           return;                          // scope 0 at $DIR/ref_deref.rs:6:2: 6:2
  41       }
  42   }
  43