src/test/mir-opt/const_prop/control_flow_simplification.hello.ConstProp.diff

   1 - // MIR for `hello` before ConstProp
   2 + // MIR for `hello` after ConstProp
   3
   4   fn hello() -> () {
   5       let mut _0: ();                      // return place in scope 0 at $DIR/control-flow-simplification.rs:11:14: 11:14
   6       let mut _1: bool;                    // in scope 0 at $DIR/control-flow-simplification.rs:12:8: 12:21
   7       let mut _2: !;                       // in scope 0 at $SRC_DIR/std/src/panic.rs:LL:COL
   8
   9       bb0: {
  10           StorageLive(_1);                 // scope 0 at $DIR/control-flow-simplification.rs:12:8: 12:21
  11 -         _1 = const <bool as NeedsDrop>::NEEDS; // scope 0 at $DIR/control-flow-simplification.rs:12:8: 12:21
  12 -         switchInt(move _1) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/control-flow-simplification.rs:12:5: 14:6
  13 +         _1 = const false;                // scope 0 at $DIR/control-flow-simplification.rs:12:8: 12:21
  14 +         switchInt(const false) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/control-flow-simplification.rs:12:5: 14:6
  15       }
  16
  17       bb1: {
  18           StorageLive(_2);                 // scope 0 at $SRC_DIR/std/src/panic.rs:LL:COL
  19           begin_panic::<&str>(const "explicit panic"); // scope 0 at $SRC_DIR/std/src/panic.rs:LL:COL
  20                                            // mir::Constant
  21                                            // + span: $SRC_DIR/std/src/panic.rs:LL:COL
  22                                            // + literal: Const { ty: fn(&str) -> ! {std::rt::begin_panic::<&str>}, val: Value(Scalar(<ZST>)) }
  23                                            // ty::Const
  24                                            // + ty: &str
  25                                            // + val: Value(Slice { data: Allocation { bytes: [101, 120, 112, 108, 105, 99, 105, 116, 32, 112, 97, 110, 105, 99], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [16383], len: Size { raw: 14 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 14 })
  26                                            // mir::Constant
  27                                            // + span: $SRC_DIR/std/src/panic.rs:LL:COL
  28                                            // + literal: Const { ty: &str, val: Value(Slice { data: Allocation { bytes: [101, 120, 112, 108, 105, 99, 105, 116, 32, 112, 97, 110, 105, 99], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [16383], len: Size { raw: 14 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 14 }) }
  29       }
  30
  31       bb2: {
  32           _0 = const ();                   // scope 0 at $DIR/control-flow-simplification.rs:14:6: 14:6
  33           StorageDead(_1);                 // scope 0 at $DIR/control-flow-simplification.rs:14:5: 14:6
  34           return;                          // scope 0 at $DIR/control-flow-simplification.rs:15:2: 15:2
  35       }
  36   }
  37