tests/mir-opt/const_prop/boxes.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/boxes.rs:+0:11: +0:11
   6       let _1: i32;                         // in scope 0 at $DIR/boxes.rs:+1:9: +1:10
   7       let mut _2: i32;                     // in scope 0 at $DIR/boxes.rs:+1:13: +2:18
   8       let mut _3: std::boxed::Box<i32>;    // in scope 0 at $DIR/boxes.rs:+1:14: +2:18
   9       let mut _4: usize;                   // in scope 0 at $DIR/boxes.rs:+1:14: +2:18
  10       let mut _5: usize;                   // in scope 0 at $DIR/boxes.rs:+1:14: +2:18
  11       let mut _6: *mut u8;                 // in scope 0 at $DIR/boxes.rs:+1:14: +2:18
  12       let mut _7: std::boxed::Box<i32>;    // in scope 0 at $DIR/boxes.rs:+1:14: +2:18
  13       let mut _8: *const i32;              // in scope 0 at $DIR/boxes.rs:+1:14: +2:18
  14       let mut _9: *const i32;              // in scope 0 at $DIR/boxes.rs:+1:14: +2:18
  15       scope 1 {
  16           debug x => _1;                   // in scope 1 at $DIR/boxes.rs:+1:9: +1:10
  17       }
  18       scope 2 {
  19       }
  20
  21       bb0: {
  22           StorageLive(_1);                 // scope 0 at $DIR/boxes.rs:+1:9: +1:10
  23           StorageLive(_2);                 // scope 0 at $DIR/boxes.rs:+1:13: +2:18
  24           StorageLive(_3);                 // scope 0 at $DIR/boxes.rs:+1:14: +2:18
  25 -         _4 = SizeOf(i32);                // scope 2 at $DIR/boxes.rs:+1:14: +2:18
  26 -         _5 = AlignOf(i32);               // scope 2 at $DIR/boxes.rs:+1:14: +2:18
  27 +         _4 = const 4_usize;              // scope 2 at $DIR/boxes.rs:+1:14: +2:18
  28 +         _5 = const 4_usize;              // scope 2 at $DIR/boxes.rs:+1:14: +2:18
  29           _6 = alloc::alloc::exchange_malloc(move _4, move _5) -> bb1; // scope 2 at $DIR/boxes.rs:+1:14: +2:18
  30                                            // mir::Constant
  31                                            // + span: $DIR/boxes.rs:13:14: 14:18
  32                                            // + literal: Const { ty: unsafe fn(usize, usize) -> *mut u8 {alloc::alloc::exchange_malloc}, val: Value(<ZST>) }
  33       }
  34
  35       bb1: {
  36           StorageLive(_7);                 // scope 0 at $DIR/boxes.rs:+1:14: +2:18
  37           _7 = ShallowInitBox(move _6, i32); // scope 0 at $DIR/boxes.rs:+1:14: +2:18
  38           _8 = (((_7.0: std::ptr::Unique<i32>).0: std::ptr::NonNull<i32>).0: *const i32); // scope 0 at $DIR/boxes.rs:+2:14: +2:16
  39           (*_8) = const 42_i32;            // scope 0 at $DIR/boxes.rs:+2:14: +2:16
  40           _3 = move _7;                    // scope 0 at $DIR/boxes.rs:+1:14: +2:18
  41           StorageDead(_7);                 // scope 0 at $DIR/boxes.rs:+2:17: +2:18
  42           _9 = (((_3.0: std::ptr::Unique<i32>).0: std::ptr::NonNull<i32>).0: *const i32); // scope 0 at $DIR/boxes.rs:+1:13: +2:18
  43           _2 = (*_9);                      // scope 0 at $DIR/boxes.rs:+1:13: +2:18
  44           _1 = Add(move _2, const 0_i32);  // scope 0 at $DIR/boxes.rs:+1:13: +3:12
  45           StorageDead(_2);                 // scope 0 at $DIR/boxes.rs:+3:11: +3:12
  46           drop(_3) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/boxes.rs:+3:12: +3:13
  47       }
  48
  49       bb2: {
  50           StorageDead(_3);                 // scope 0 at $DIR/boxes.rs:+3:12: +3:13
  51           _0 = const ();                   // scope 0 at $DIR/boxes.rs:+0:11: +4:2
  52           StorageDead(_1);                 // scope 0 at $DIR/boxes.rs:+4:1: +4:2
  53           return;                          // scope 0 at $DIR/boxes.rs:+4:2: +4:2
  54       }
  55
  56       bb3 (cleanup): {
  57           resume;                          // scope 0 at $DIR/boxes.rs:+0:1: +4:2
  58       }
  59   }
  60