src/test/mir-opt/const_prop/slice_len/32bit/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/slice_len.rs:4:11: 4:11
   6       let _1: u32;                         // in scope 0 at $DIR/slice_len.rs:5:5: 5:33
   7       let mut _2: &[u32];                  // in scope 0 at $DIR/slice_len.rs:5:5: 5:30
   8       let mut _3: &[u32; 3];               // in scope 0 at $DIR/slice_len.rs:5:6: 5:19
   9       let _4: &[u32; 3];                   // in scope 0 at $DIR/slice_len.rs:5:6: 5:19
  10       let _5: [u32; 3];                    // in scope 0 at $DIR/slice_len.rs:5:7: 5:19
  11       let _6: usize;                       // in scope 0 at $DIR/slice_len.rs:5:31: 5:32
  12       let mut _7: usize;                   // in scope 0 at $DIR/slice_len.rs:5:5: 5:33
  13       let mut _8: bool;                    // in scope 0 at $DIR/slice_len.rs:5:5: 5:33
  14       let mut _9: &[u32; 3];               // in scope 0 at $DIR/slice_len.rs:5:6: 5:19
  15
  16       bb0: {
  17           StorageLive(_1);                 // scope 0 at $DIR/slice_len.rs:5:5: 5:33
  18           StorageLive(_2);                 // scope 0 at $DIR/slice_len.rs:5:5: 5:30
  19           StorageLive(_3);                 // scope 0 at $DIR/slice_len.rs:5:6: 5:19
  20           StorageLive(_4);                 // scope 0 at $DIR/slice_len.rs:5:6: 5:19
  21           _9 = const main::promoted[0];    // scope 0 at $DIR/slice_len.rs:5:6: 5:19
  22                                            // ty::Const
  23                                            // + ty: &[u32; 3]
  24                                            // + val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ slice_len[317d]::main[0]), const_param_did: None }, [], Some(promoted[0]))
  25                                            // mir::Constant
  26                                            // + span: $DIR/slice_len.rs:5:6: 5:19
  27                                            // + literal: Const { ty: &[u32; 3], val: Unevaluated(WithOptConstParam { did: DefId(0:3 ~ slice_len[317d]::main[0]), const_param_did: None }, [], Some(promoted[0])) }
  28           _4 = _9;                         // scope 0 at $DIR/slice_len.rs:5:6: 5:19
  29           _3 = _4;                         // scope 0 at $DIR/slice_len.rs:5:6: 5:19
  30           _2 = move _3 as &[u32] (Pointer(Unsize)); // scope 0 at $DIR/slice_len.rs:5:6: 5:19
  31           StorageDead(_3);                 // scope 0 at $DIR/slice_len.rs:5:18: 5:19
  32           StorageLive(_6);                 // scope 0 at $DIR/slice_len.rs:5:31: 5:32
  33           _6 = const 1_usize;              // scope 0 at $DIR/slice_len.rs:5:31: 5:32
  34                                            // ty::Const
  35                                            // + ty: usize
  36                                            // + val: Value(Scalar(0x00000001))
  37                                            // mir::Constant
  38                                            // + span: $DIR/slice_len.rs:5:31: 5:32
  39                                            // + literal: Const { ty: usize, val: Value(Scalar(0x00000001)) }
  40 -         _7 = Len((*_2));                 // scope 0 at $DIR/slice_len.rs:5:5: 5:33
  41 -         _8 = Lt(_6, _7);                 // scope 0 at $DIR/slice_len.rs:5:5: 5:33
  42 -         assert(move _8, "index out of bounds: the len is {} but the index is {}", move _7, _6) -> bb1; // scope 0 at $DIR/slice_len.rs:5:5: 5:33
  43 +         _7 = const 3_usize;              // scope 0 at $DIR/slice_len.rs:5:5: 5:33
  44 +                                          // ty::Const
  45 +                                          // + ty: usize
  46 +                                          // + val: Value(Scalar(0x00000003))
  47 +                                          // mir::Constant
  48 +                                          // + span: $DIR/slice_len.rs:5:5: 5:33
  49 +                                          // + literal: Const { ty: usize, val: Value(Scalar(0x00000003)) }
  50 +         _8 = const true;                 // scope 0 at $DIR/slice_len.rs:5:5: 5:33
  51 +                                          // ty::Const
  52 +                                          // + ty: bool
  53 +                                          // + val: Value(Scalar(0x01))
  54 +                                          // mir::Constant
  55 +                                          // + span: $DIR/slice_len.rs:5:5: 5:33
  56 +                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
  57 +         assert(const true, "index out of bounds: the len is {} but the index is {}", move _7, _6) -> bb1; // scope 0 at $DIR/slice_len.rs:5:5: 5:33
  58 +                                          // ty::Const
  59 +                                          // + ty: bool
  60 +                                          // + val: Value(Scalar(0x01))
  61 +                                          // mir::Constant
  62 +                                          // + span: $DIR/slice_len.rs:5:5: 5:33
  63 +                                          // + literal: Const { ty: bool, val: Value(Scalar(0x01)) }
  64       }
  65
  66       bb1: {
  67 -         _1 = (*_2)[_6];                  // scope 0 at $DIR/slice_len.rs:5:5: 5:33
  68 +         _1 = const 2_u32;                // scope 0 at $DIR/slice_len.rs:5:5: 5:33
  69 +                                          // ty::Const
  70 +                                          // + ty: u32
  71 +                                          // + val: Value(Scalar(0x00000002))
  72 +                                          // mir::Constant
  73 +                                          // + span: $DIR/slice_len.rs:5:5: 5:33
  74 +                                          // + literal: Const { ty: u32, val: Value(Scalar(0x00000002)) }
  75           StorageDead(_6);                 // scope 0 at $DIR/slice_len.rs:5:33: 5:34
  76           StorageDead(_4);                 // scope 0 at $DIR/slice_len.rs:5:33: 5:34
  77           StorageDead(_2);                 // scope 0 at $DIR/slice_len.rs:5:33: 5:34
  78           StorageDead(_1);                 // scope 0 at $DIR/slice_len.rs:5:33: 5:34
  79           _0 = const ();                   // scope 0 at $DIR/slice_len.rs:4:11: 6:2
  80                                            // ty::Const
  81                                            // + ty: ()
  82                                            // + val: Value(Scalar(<ZST>))
  83                                            // mir::Constant
  84                                            // + span: $DIR/slice_len.rs:4:11: 6:2
  85                                            // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
  86           return;                          // scope 0 at $DIR/slice_len.rs:6:2: 6:2
  87       }
  88   }
  89