- // MIR for `main` before DataflowConstProp + // MIR for `main` after DataflowConstProp fn main() -> () { let mut _0: (); let mut _1: u8; let mut _2: u8; let mut _3: u8; scope 1 { } scope 2 (inlined #[track_caller] ::add) { let mut _4: (u8, bool); } bb0: { StorageLive(_1); StorageLive(_2); _2 = const u8::MAX; StorageLive(_3); _3 = const 1_u8; StorageLive(_4); - _4 = AddWithOverflow(copy _2, copy _3); - assert(!move (_4.1: bool), "attempt to compute `{} + {}`, which would overflow", copy _2, copy _3) -> [success: bb1, unwind continue]; + _4 = const (0_u8, true); + assert(!const true, "attempt to compute `{} + {}`, which would overflow", const u8::MAX, const 1_u8) -> [success: bb1, unwind continue]; } bb1: { - _1 = move (_4.0: u8); + _1 = const 0_u8; StorageDead(_4); StorageDead(_3); StorageDead(_2); StorageDead(_1); _0 = const (); return; } + } + + ALLOC0 (size: 2, align: 1) { + 00 01 │ .. }