1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
//@ test-mir-pass: UnreachablePropagation
// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
pub enum Empty {}
fn empty() -> Option<Empty> {
None
}
fn loop_forever() {
loop {}
}
// EMIT_MIR unreachable_diverging.main.UnreachablePropagation.diff
fn main() {
// CHECK-LABEL: fn main(
// CHECK: bb0: {
// CHECK: {{_.*}} = empty()
// CHECK: bb1: {
// CHECK: switchInt({{.*}}) -> [1: bb2, otherwise: bb6];
// CHECK: bb2: {
// CHECK: [[ne:_.*]] = Ne({{.*}}, const false);
// CHECK: assume(move [[ne]]);
// CHECK: goto -> bb3;
// CHECK: bb3: {
// CHECK: {{_.*}} = loop_forever()
// CHECK: bb4: {
// CHECK: unreachable;
// CHECK: bb5: {
// CHECK: unreachable;
// CHECK: bb6: {
// CHECK: return;
let x = true;
if let Some(bomb) = empty() {
if x {
loop_forever()
}
match bomb {}
}
}
|
