summaryrefslogtreecommitdiffstats
path: root/src/test/mir-opt/matches_reduce_branches.rs
blob: a81d5f7b4e8bc7a529a69fb680b449b7f7fe67fa (plain)
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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
// unit-test: MatchBranchSimplification


// EMIT_MIR matches_reduce_branches.foo.MatchBranchSimplification.diff
// EMIT_MIR matches_reduce_branches.bar.MatchBranchSimplification.diff
// EMIT_MIR matches_reduce_branches.match_nested_if.MatchBranchSimplification.diff

fn foo(bar: Option<()>) {
    if matches!(bar, None) {
        ()
    }
}

fn bar(i: i32) -> (bool, bool, bool, bool) {
    let a;
    let b;
    let c;
    let d;

    match i {
        7 => {
            a = false;
            b = true;
            c = false;
            d = true;
            ()
        }
        _ => {
            a = true;
            b = false;
            c = false;
            d = true;
            ()
        }
    };

    (a, b, c, d)
}

fn match_nested_if() -> bool {
    let val = match () {
        () if if if if true { true } else { false } { true } else { false } {
            true
        } else {
            false
        } =>
        {
            true
        }
        _ => false,
    };
    val
}

fn main() {
    let _ = foo(None);
    let _ = foo(Some(()));
    let _ = bar(0);
    let _ = match_nested_if();
}