28 lines
780 B
Rust
28 lines
780 B
Rust
// skip-filecheck
|
|
// needs-unwind
|
|
// this tests move up progration, which is not yet implemented
|
|
|
|
// EMIT_MIR basic_assignment.main.ElaborateDrops.diff
|
|
// 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;
|
|
}
|