src/test/mir-opt/lower_intrinsics.discriminant.LowerIntrinsics.diff

- // MIR for `discriminant` before LowerIntrinsics
+ // MIR for `discriminant` after LowerIntrinsics
  
  fn discriminant(_1: T) -> () {
      debug t => _1;                       // in scope 0 at $DIR/lower_intrinsics.rs:68:24: 68:25
      let mut _0: ();                      // return place in scope 0 at $DIR/lower_intrinsics.rs:68:30: 68:30
      let _2: <T as std::marker::DiscriminantKind>::Discriminant; // in scope 0 at $DIR/lower_intrinsics.rs:69:5: 69:45
      let mut _3: &T;                      // in scope 0 at $DIR/lower_intrinsics.rs:69:42: 69:44
      let _4: &T;                          // in scope 0 at $DIR/lower_intrinsics.rs:69:42: 69:44
      let _5: u8;                          // in scope 0 at $DIR/lower_intrinsics.rs:70:5: 70:45
      let mut _6: &i32;                    // in scope 0 at $DIR/lower_intrinsics.rs:70:42: 70:44
      let _7: &i32;                        // in scope 0 at $DIR/lower_intrinsics.rs:70:42: 70:44
      let _8: i32;                         // in scope 0 at $DIR/lower_intrinsics.rs:70:43: 70:44
      let _9: u8;                          // in scope 0 at $DIR/lower_intrinsics.rs:71:5: 71:46
      let mut _10: &();                    // in scope 0 at $DIR/lower_intrinsics.rs:71:42: 71:45
      let _11: &();                        // in scope 0 at $DIR/lower_intrinsics.rs:71:42: 71:45
      let _12: ();                         // in scope 0 at $DIR/lower_intrinsics.rs:71:43: 71:45
      let _13: isize;                      // in scope 0 at $DIR/lower_intrinsics.rs:72:5: 72:48
      let mut _14: &E;                     // in scope 0 at $DIR/lower_intrinsics.rs:72:42: 72:47
      let _15: &E;                         // in scope 0 at $DIR/lower_intrinsics.rs:72:42: 72:47
      let _16: E;                          // in scope 0 at $DIR/lower_intrinsics.rs:72:43: 72:47
      let mut _17: &E;                     // in scope 0 at $DIR/lower_intrinsics.rs:72:42: 72:47
      let mut _18: &();                    // in scope 0 at $DIR/lower_intrinsics.rs:71:42: 71:45
      let mut _19: &i32;                   // in scope 0 at $DIR/lower_intrinsics.rs:70:42: 70:44
  
      bb0: {
          StorageLive(_2);                 // scope 0 at $DIR/lower_intrinsics.rs:69:5: 69:45
          StorageLive(_3);                 // scope 0 at $DIR/lower_intrinsics.rs:69:42: 69:44
          StorageLive(_4);                 // scope 0 at $DIR/lower_intrinsics.rs:69:42: 69:44
          _4 = &_1;                        // scope 0 at $DIR/lower_intrinsics.rs:69:42: 69:44
          _3 = &(*_4);                     // scope 0 at $DIR/lower_intrinsics.rs:69:42: 69:44
-         _2 = discriminant_value::<T>(move _3) -> bb1; // scope 0 at $DIR/lower_intrinsics.rs:69:5: 69:45
-                                          // mir::Constant
-                                          // + span: $DIR/lower_intrinsics.rs:69:5: 69:41
-                                          // + literal: Const { ty: for<'r> extern "rust-intrinsic" fn(&'r T) -> <T as std::marker::DiscriminantKind>::Discriminant {std::intrinsics::discriminant_value::<T>}, val: Value(Scalar(<ZST>)) }
+         _2 = discriminant((*_3));        // scope 0 at $DIR/lower_intrinsics.rs:69:5: 69:45
+         goto -> bb1;                     // scope 0 at $DIR/lower_intrinsics.rs:69:5: 69:45
      }
  
      bb1: {
          StorageDead(_3);                 // scope 0 at $DIR/lower_intrinsics.rs:69:44: 69:45
          StorageDead(_4);                 // scope 0 at $DIR/lower_intrinsics.rs:69:45: 69:46
          StorageDead(_2);                 // scope 0 at $DIR/lower_intrinsics.rs:69:45: 69:46
          StorageLive(_5);                 // scope 0 at $DIR/lower_intrinsics.rs:70:5: 70:45
          StorageLive(_6);                 // scope 0 at $DIR/lower_intrinsics.rs:70:42: 70:44
          StorageLive(_7);                 // scope 0 at $DIR/lower_intrinsics.rs:70:42: 70:44
          _19 = const discriminant::<T>::promoted[2]; // scope 0 at $DIR/lower_intrinsics.rs:70:42: 70:44
                                           // ty::Const
                                           // + ty: &i32
                                           // + val: Unevaluated(discriminant, [T], Some(promoted[2]))
                                           // mir::Constant
                                           // + span: $DIR/lower_intrinsics.rs:70:42: 70:44
                                           // + literal: Const { ty: &i32, val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:27 ~ lower_intrinsics[8787]::discriminant), const_param_did: None }, substs: [T], promoted: Some(promoted[2]) }) }
          _7 = &(*_19);                    // scope 0 at $DIR/lower_intrinsics.rs:70:42: 70:44
          _6 = &(*_7);                     // scope 0 at $DIR/lower_intrinsics.rs:70:42: 70:44
-         _5 = discriminant_value::<i32>(move _6) -> bb2; // scope 0 at $DIR/lower_intrinsics.rs:70:5: 70:45
-                                          // mir::Constant
-                                          // + span: $DIR/lower_intrinsics.rs:70:5: 70:41
-                                          // + literal: Const { ty: for<'r> extern "rust-intrinsic" fn(&'r i32) -> <i32 as std::marker::DiscriminantKind>::Discriminant {std::intrinsics::discriminant_value::<i32>}, val: Value(Scalar(<ZST>)) }
+         _5 = discriminant((*_6));        // scope 0 at $DIR/lower_intrinsics.rs:70:5: 70:45
+         goto -> bb2;                     // scope 0 at $DIR/lower_intrinsics.rs:70:5: 70:45
      }
  
      bb2: {
          StorageDead(_6);                 // scope 0 at $DIR/lower_intrinsics.rs:70:44: 70:45
          StorageDead(_7);                 // scope 0 at $DIR/lower_intrinsics.rs:70:45: 70:46
          StorageDead(_5);                 // scope 0 at $DIR/lower_intrinsics.rs:70:45: 70:46
          StorageLive(_9);                 // scope 0 at $DIR/lower_intrinsics.rs:71:5: 71:46
          StorageLive(_10);                // scope 0 at $DIR/lower_intrinsics.rs:71:42: 71:45
          StorageLive(_11);                // scope 0 at $DIR/lower_intrinsics.rs:71:42: 71:45
          _18 = const discriminant::<T>::promoted[1]; // scope 0 at $DIR/lower_intrinsics.rs:71:42: 71:45
                                           // ty::Const
                                           // + ty: &()
                                           // + val: Unevaluated(discriminant, [T], Some(promoted[1]))
                                           // mir::Constant
                                           // + span: $DIR/lower_intrinsics.rs:71:42: 71:45
                                           // + literal: Const { ty: &(), val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:27 ~ lower_intrinsics[8787]::discriminant), const_param_did: None }, substs: [T], promoted: Some(promoted[1]) }) }
          _11 = &(*_18);                   // scope 0 at $DIR/lower_intrinsics.rs:71:42: 71:45
          _10 = &(*_11);                   // scope 0 at $DIR/lower_intrinsics.rs:71:42: 71:45
-         _9 = discriminant_value::<()>(move _10) -> bb3; // scope 0 at $DIR/lower_intrinsics.rs:71:5: 71:46
-                                          // mir::Constant
-                                          // + span: $DIR/lower_intrinsics.rs:71:5: 71:41
-                                          // + literal: Const { ty: for<'r> extern "rust-intrinsic" fn(&'r ()) -> <() as std::marker::DiscriminantKind>::Discriminant {std::intrinsics::discriminant_value::<()>}, val: Value(Scalar(<ZST>)) }
+         _9 = discriminant((*_10));       // scope 0 at $DIR/lower_intrinsics.rs:71:5: 71:46
+         goto -> bb3;                     // scope 0 at $DIR/lower_intrinsics.rs:71:5: 71:46
      }
  
      bb3: {
          StorageDead(_10);                // scope 0 at $DIR/lower_intrinsics.rs:71:45: 71:46
          StorageDead(_11);                // scope 0 at $DIR/lower_intrinsics.rs:71:46: 71:47
          StorageDead(_9);                 // scope 0 at $DIR/lower_intrinsics.rs:71:46: 71:47
          StorageLive(_13);                // scope 0 at $DIR/lower_intrinsics.rs:72:5: 72:48
          StorageLive(_14);                // scope 0 at $DIR/lower_intrinsics.rs:72:42: 72:47
          StorageLive(_15);                // scope 0 at $DIR/lower_intrinsics.rs:72:42: 72:47
          _17 = const discriminant::<T>::promoted[0]; // scope 0 at $DIR/lower_intrinsics.rs:72:42: 72:47
                                           // ty::Const
                                           // + ty: &E
                                           // + val: Unevaluated(discriminant, [T], Some(promoted[0]))
                                           // mir::Constant
                                           // + span: $DIR/lower_intrinsics.rs:72:42: 72:47
                                           // + literal: Const { ty: &E, val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:27 ~ lower_intrinsics[8787]::discriminant), const_param_did: None }, substs: [T], promoted: Some(promoted[0]) }) }
          _15 = &(*_17);                   // scope 0 at $DIR/lower_intrinsics.rs:72:42: 72:47
          _14 = &(*_15);                   // scope 0 at $DIR/lower_intrinsics.rs:72:42: 72:47
-         _13 = discriminant_value::<E>(move _14) -> bb4; // scope 0 at $DIR/lower_intrinsics.rs:72:5: 72:48
-                                          // mir::Constant
-                                          // + span: $DIR/lower_intrinsics.rs:72:5: 72:41
-                                          // + literal: Const { ty: for<'r> extern "rust-intrinsic" fn(&'r E) -> <E as std::marker::DiscriminantKind>::Discriminant {std::intrinsics::discriminant_value::<E>}, val: Value(Scalar(<ZST>)) }
+         _13 = discriminant((*_14));      // scope 0 at $DIR/lower_intrinsics.rs:72:5: 72:48
+         goto -> bb4;                     // scope 0 at $DIR/lower_intrinsics.rs:72:5: 72:48
      }
  
      bb4: {
          StorageDead(_14);                // scope 0 at $DIR/lower_intrinsics.rs:72:47: 72:48
          StorageDead(_15);                // scope 0 at $DIR/lower_intrinsics.rs:72:48: 72:49
          StorageDead(_13);                // scope 0 at $DIR/lower_intrinsics.rs:72:48: 72:49
          _0 = const ();                   // scope 0 at $DIR/lower_intrinsics.rs:68:30: 73:2
          drop(_1) -> bb5;                 // scope 0 at $DIR/lower_intrinsics.rs:73:1: 73:2
      }
  
      bb5: {
          return;                          // scope 0 at $DIR/lower_intrinsics.rs:73:2: 73:2
      }
  
      bb6 (cleanup): {
          resume;                          // scope 0 at $DIR/lower_intrinsics.rs:68:1: 73:2
      }
  }