rust/tests/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:+0:24: +0:25
      let mut _0: ();                      // return place in scope 0 at $DIR/lower_intrinsics.rs:+0:30: +0:30
      let _2: <T as std::marker::DiscriminantKind>::Discriminant; // in scope 0 at $DIR/lower_intrinsics.rs:+1:5: +1:45
      let mut _3: &T;                      // in scope 0 at $DIR/lower_intrinsics.rs:+1:42: +1:44
      let _4: &T;                          // in scope 0 at $DIR/lower_intrinsics.rs:+1:42: +1:44
      let _5: u8;                          // in scope 0 at $DIR/lower_intrinsics.rs:+2:5: +2:45
      let mut _6: &i32;                    // in scope 0 at $DIR/lower_intrinsics.rs:+2:42: +2:44
      let _7: &i32;                        // in scope 0 at $DIR/lower_intrinsics.rs:+2:42: +2:44
      let _8: i32;                         // in scope 0 at $DIR/lower_intrinsics.rs:+2:43: +2:44
      let _9: u8;                          // in scope 0 at $DIR/lower_intrinsics.rs:+3:5: +3:46
      let mut _10: &();                    // in scope 0 at $DIR/lower_intrinsics.rs:+3:42: +3:45
      let _11: &();                        // in scope 0 at $DIR/lower_intrinsics.rs:+3:42: +3:45
      let _12: ();                         // in scope 0 at $DIR/lower_intrinsics.rs:+3:43: +3:45
      let _13: isize;                      // in scope 0 at $DIR/lower_intrinsics.rs:+4:5: +4:48
      let mut _14: &E;                     // in scope 0 at $DIR/lower_intrinsics.rs:+4:42: +4:47
      let _15: &E;                         // in scope 0 at $DIR/lower_intrinsics.rs:+4:42: +4:47
      let _16: E;                          // in scope 0 at $DIR/lower_intrinsics.rs:+4:43: +4:47
      let mut _17: &E;                     // in scope 0 at $DIR/lower_intrinsics.rs:+4:42: +4:47
      let mut _18: &();                    // in scope 0 at $DIR/lower_intrinsics.rs:+3:42: +3:45
      let mut _19: &i32;                   // in scope 0 at $DIR/lower_intrinsics.rs:+2:42: +2:44
  
      bb0: {
          StorageLive(_2);                 // scope 0 at $DIR/lower_intrinsics.rs:+1:5: +1:45
          StorageLive(_3);                 // scope 0 at $DIR/lower_intrinsics.rs:+1:42: +1:44
          StorageLive(_4);                 // scope 0 at $DIR/lower_intrinsics.rs:+1:42: +1:44
          _4 = &_1;                        // scope 0 at $DIR/lower_intrinsics.rs:+1:42: +1:44
          _3 = &(*_4);                     // scope 0 at $DIR/lower_intrinsics.rs:+1:42: +1:44
-         _2 = discriminant_value::<T>(move _3) -> [return: bb1, unwind unreachable]; // scope 0 at $DIR/lower_intrinsics.rs:+1:5: +1:45
-                                          // mir::Constant
-                                          // + span: $DIR/lower_intrinsics.rs:82:5: 82:41
-                                          // + literal: Const { ty: for<'a> extern "rust-intrinsic" fn(&'a T) -> <T as DiscriminantKind>::Discriminant {discriminant_value::<T>}, val: Value(<ZST>) }
+         _2 = discriminant((*_3));        // scope 0 at $DIR/lower_intrinsics.rs:+1:5: +1:45
+         goto -> bb1;                     // scope 0 at $DIR/lower_intrinsics.rs:+1:5: +1:45
      }
  
      bb1: {
          StorageDead(_3);                 // scope 0 at $DIR/lower_intrinsics.rs:+1:44: +1:45
          StorageDead(_4);                 // scope 0 at $DIR/lower_intrinsics.rs:+1:45: +1:46
          StorageDead(_2);                 // scope 0 at $DIR/lower_intrinsics.rs:+1:45: +1:46
          StorageLive(_5);                 // scope 0 at $DIR/lower_intrinsics.rs:+2:5: +2:45
          StorageLive(_6);                 // scope 0 at $DIR/lower_intrinsics.rs:+2:42: +2:44
          StorageLive(_7);                 // scope 0 at $DIR/lower_intrinsics.rs:+2:42: +2:44
          _19 = const _;                   // scope 0 at $DIR/lower_intrinsics.rs:+2:42: +2:44
                                           // mir::Constant
                                           // + span: $DIR/lower_intrinsics.rs:83:42: 83:44
                                           // + literal: Const { ty: &i32, val: Unevaluated(discriminant, [T], Some(promoted[2])) }
          _7 = &(*_19);                    // scope 0 at $DIR/lower_intrinsics.rs:+2:42: +2:44
          _6 = &(*_7);                     // scope 0 at $DIR/lower_intrinsics.rs:+2:42: +2:44
-         _5 = discriminant_value::<i32>(move _6) -> [return: bb2, unwind unreachable]; // scope 0 at $DIR/lower_intrinsics.rs:+2:5: +2:45
-                                          // mir::Constant
-                                          // + span: $DIR/lower_intrinsics.rs:83:5: 83:41
-                                          // + literal: Const { ty: for<'a> extern "rust-intrinsic" fn(&'a i32) -> <i32 as DiscriminantKind>::Discriminant {discriminant_value::<i32>}, val: Value(<ZST>) }
+         _5 = discriminant((*_6));        // scope 0 at $DIR/lower_intrinsics.rs:+2:5: +2:45
+         goto -> bb2;                     // scope 0 at $DIR/lower_intrinsics.rs:+2:5: +2:45
      }
  
      bb2: {
          StorageDead(_6);                 // scope 0 at $DIR/lower_intrinsics.rs:+2:44: +2:45
          StorageDead(_7);                 // scope 0 at $DIR/lower_intrinsics.rs:+2:45: +2:46
          StorageDead(_5);                 // scope 0 at $DIR/lower_intrinsics.rs:+2:45: +2:46
          StorageLive(_9);                 // scope 0 at $DIR/lower_intrinsics.rs:+3:5: +3:46
          StorageLive(_10);                // scope 0 at $DIR/lower_intrinsics.rs:+3:42: +3:45
          StorageLive(_11);                // scope 0 at $DIR/lower_intrinsics.rs:+3:42: +3:45
          _18 = const _;                   // scope 0 at $DIR/lower_intrinsics.rs:+3:42: +3:45
                                           // mir::Constant
                                           // + span: $DIR/lower_intrinsics.rs:84:42: 84:45
                                           // + literal: Const { ty: &(), val: Unevaluated(discriminant, [T], Some(promoted[1])) }
          _11 = &(*_18);                   // scope 0 at $DIR/lower_intrinsics.rs:+3:42: +3:45
          _10 = &(*_11);                   // scope 0 at $DIR/lower_intrinsics.rs:+3:42: +3:45
-         _9 = discriminant_value::<()>(move _10) -> [return: bb3, unwind unreachable]; // scope 0 at $DIR/lower_intrinsics.rs:+3:5: +3:46
-                                          // mir::Constant
-                                          // + span: $DIR/lower_intrinsics.rs:84:5: 84:41
-                                          // + literal: Const { ty: for<'a> extern "rust-intrinsic" fn(&'a ()) -> <() as DiscriminantKind>::Discriminant {discriminant_value::<()>}, val: Value(<ZST>) }
+         _9 = discriminant((*_10));       // scope 0 at $DIR/lower_intrinsics.rs:+3:5: +3:46
+         goto -> bb3;                     // scope 0 at $DIR/lower_intrinsics.rs:+3:5: +3:46
      }
  
      bb3: {
          StorageDead(_10);                // scope 0 at $DIR/lower_intrinsics.rs:+3:45: +3:46
          StorageDead(_11);                // scope 0 at $DIR/lower_intrinsics.rs:+3:46: +3:47
          StorageDead(_9);                 // scope 0 at $DIR/lower_intrinsics.rs:+3:46: +3:47
          StorageLive(_13);                // scope 0 at $DIR/lower_intrinsics.rs:+4:5: +4:48
          StorageLive(_14);                // scope 0 at $DIR/lower_intrinsics.rs:+4:42: +4:47
          StorageLive(_15);                // scope 0 at $DIR/lower_intrinsics.rs:+4:42: +4:47
          _17 = const _;                   // scope 0 at $DIR/lower_intrinsics.rs:+4:42: +4:47
                                           // mir::Constant
                                           // + span: $DIR/lower_intrinsics.rs:85:42: 85:47
                                           // + literal: Const { ty: &E, val: Unevaluated(discriminant, [T], Some(promoted[0])) }
          _15 = &(*_17);                   // scope 0 at $DIR/lower_intrinsics.rs:+4:42: +4:47
          _14 = &(*_15);                   // scope 0 at $DIR/lower_intrinsics.rs:+4:42: +4:47
-         _13 = discriminant_value::<E>(move _14) -> [return: bb4, unwind unreachable]; // scope 0 at $DIR/lower_intrinsics.rs:+4:5: +4:48
-                                          // mir::Constant
-                                          // + span: $DIR/lower_intrinsics.rs:85:5: 85:41
-                                          // + literal: Const { ty: for<'a> extern "rust-intrinsic" fn(&'a E) -> <E as DiscriminantKind>::Discriminant {discriminant_value::<E>}, val: Value(<ZST>) }
+         _13 = discriminant((*_14));      // scope 0 at $DIR/lower_intrinsics.rs:+4:5: +4:48
+         goto -> bb4;                     // scope 0 at $DIR/lower_intrinsics.rs:+4:5: +4:48
      }
  
      bb4: {
          StorageDead(_14);                // scope 0 at $DIR/lower_intrinsics.rs:+4:47: +4:48
          StorageDead(_15);                // scope 0 at $DIR/lower_intrinsics.rs:+4:48: +4:49
          StorageDead(_13);                // scope 0 at $DIR/lower_intrinsics.rs:+4:48: +4:49
          _0 = const ();                   // scope 0 at $DIR/lower_intrinsics.rs:+0:30: +5:2
          drop(_1) -> [return: bb5, unwind: bb6]; // scope 0 at $DIR/lower_intrinsics.rs:+5:1: +5:2
      }
  
      bb5: {
          return;                          // scope 0 at $DIR/lower_intrinsics.rs:+5:2: +5:2
      }
  
      bb6 (cleanup): {
          resume;                          // scope 0 at $DIR/lower_intrinsics.rs:+0:1: +5:2
      }
  }