src/test/mir-opt/const_prop/read_immutable_static/rustc.main.ConstProp.diff

   1 - // MIR for `main` before ConstProp
   2 + // MIR for `main` after ConstProp
   3
   4   fn main() -> () {
   5       let mut _0: ();                      // return place in scope 0 at $DIR/read_immutable_static.rs:6:11: 6:11
   6       let _1: u8;                          // in scope 0 at $DIR/read_immutable_static.rs:7:9: 7:10
   7       let mut _2: u8;                      // in scope 0 at $DIR/read_immutable_static.rs:7:13: 7:16
   8       let mut _3: &u8;                     // in scope 0 at $DIR/read_immutable_static.rs:7:13: 7:16
   9       let mut _4: u8;                      // in scope 0 at $DIR/read_immutable_static.rs:7:19: 7:22
  10       let mut _5: &u8;                     // in scope 0 at $DIR/read_immutable_static.rs:7:19: 7:22
  11       scope 1 {
  12           debug x => _1;                   // in scope 1 at $DIR/read_immutable_static.rs:7:9: 7:10
  13       }
  14
  15       bb0: {
  16           StorageLive(_1);                 // bb0[0]: scope 0 at $DIR/read_immutable_static.rs:7:9: 7:10
  17           StorageLive(_2);                 // bb0[1]: scope 0 at $DIR/read_immutable_static.rs:7:13: 7:16
  18           StorageLive(_3);                 // bb0[2]: scope 0 at $DIR/read_immutable_static.rs:7:13: 7:16
  19           _3 = const {alloc0+0: &u8};      // bb0[3]: scope 0 at $DIR/read_immutable_static.rs:7:13: 7:16
  20                                            // ty::Const
  21                                            // + ty: &u8
  22                                            // + val: Value(Scalar(alloc0+0))
  23                                            // mir::Constant
  24                                            // + span: $DIR/read_immutable_static.rs:7:13: 7:16
  25                                            // + literal: Const { ty: &u8, val: Value(Scalar(alloc0+0)) }
  26 -         _2 = (*_3);                      // bb0[4]: scope 0 at $DIR/read_immutable_static.rs:7:13: 7:16
  27 +         _2 = const 2u8;                  // bb0[4]: scope 0 at $DIR/read_immutable_static.rs:7:13: 7:16
  28 +                                          // ty::Const
  29 +                                          // + ty: u8
  30 +                                          // + val: Value(Scalar(0x02))
  31 +                                          // mir::Constant
  32 +                                          // + span: $DIR/read_immutable_static.rs:7:13: 7:16
  33 +                                          // + literal: Const { ty: u8, val: Value(Scalar(0x02)) }
  34           StorageLive(_4);                 // bb0[5]: scope 0 at $DIR/read_immutable_static.rs:7:19: 7:22
  35           StorageLive(_5);                 // bb0[6]: scope 0 at $DIR/read_immutable_static.rs:7:19: 7:22
  36           _5 = const {alloc0+0: &u8};      // bb0[7]: scope 0 at $DIR/read_immutable_static.rs:7:19: 7:22
  37                                            // ty::Const
  38                                            // + ty: &u8
  39                                            // + val: Value(Scalar(alloc0+0))
  40                                            // mir::Constant
  41                                            // + span: $DIR/read_immutable_static.rs:7:19: 7:22
  42                                            // + literal: Const { ty: &u8, val: Value(Scalar(alloc0+0)) }
  43 -         _4 = (*_5);                      // bb0[8]: scope 0 at $DIR/read_immutable_static.rs:7:19: 7:22
  44 -         _1 = Add(move _2, move _4);      // bb0[9]: scope 0 at $DIR/read_immutable_static.rs:7:13: 7:22
  45 +         _4 = const 2u8;                  // bb0[8]: scope 0 at $DIR/read_immutable_static.rs:7:19: 7:22
  46 +                                          // ty::Const
  47 +                                          // + ty: u8
  48 +                                          // + val: Value(Scalar(0x02))
  49 +                                          // mir::Constant
  50 +                                          // + span: $DIR/read_immutable_static.rs:7:19: 7:22
  51 +                                          // + literal: Const { ty: u8, val: Value(Scalar(0x02)) }
  52 +         _1 = const 4u8;                  // bb0[9]: scope 0 at $DIR/read_immutable_static.rs:7:13: 7:22
  53 +                                          // ty::Const
  54 +                                          // + ty: u8
  55 +                                          // + val: Value(Scalar(0x04))
  56 +                                          // mir::Constant
  57 +                                          // + span: $DIR/read_immutable_static.rs:7:13: 7:22
  58 +                                          // + literal: Const { ty: u8, val: Value(Scalar(0x04)) }
  59           StorageDead(_4);                 // bb0[10]: scope 0 at $DIR/read_immutable_static.rs:7:21: 7:22
  60           StorageDead(_2);                 // bb0[11]: scope 0 at $DIR/read_immutable_static.rs:7:21: 7:22
  61           StorageDead(_5);                 // bb0[12]: scope 0 at $DIR/read_immutable_static.rs:7:22: 7:23
  62           StorageDead(_3);                 // bb0[13]: scope 0 at $DIR/read_immutable_static.rs:7:22: 7:23
  63           _0 = const ();                   // bb0[14]: scope 0 at $DIR/read_immutable_static.rs:6:11: 8:2
  64                                            // ty::Const
  65                                            // + ty: ()
  66                                            // + val: Value(Scalar(<ZST>))
  67                                            // mir::Constant
  68                                            // + span: $DIR/read_immutable_static.rs:6:11: 8:2
  69                                            // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
  70           StorageDead(_1);                 // bb0[15]: scope 0 at $DIR/read_immutable_static.rs:8:1: 8:2
  71           return;                          // bb0[16]: scope 0 at $DIR/read_immutable_static.rs:8:2: 8:2
  72       }
  73   }
  74
  75   alloc0 (static: FOO, size: 1, align: 1) {
  76       02                                              │ .
  77   }
  78