| // this tests move up progration, which is not yet implemented |
| |
| // EMIT_MIR basic_assignment.main.SimplifyCfg-initial.after.mir |
| |
| // Check codegen for assignments (`a = b`) where the left-hand-side is |
| // not yet initialized. Assignments tend to be absent in simple code, |
| // so subtle breakage in them can leave a quite hard-to-find trail of |
| // destruction. |
| |
| fn main() { |
| let nodrop_x = false; |
| let nodrop_y; |
| |
| // Since boolean does not require drop, this can be a simple |
| // assignment: |
| nodrop_y = nodrop_x; |
| |
| let drop_x: Option<Box<u32>> = None; |
| let drop_y; |
| |
| // Since the type of `drop_y` has drop, we generate a `replace` |
| // terminator: |
| drop_y = drop_x; |
| } |
