File: match-optimizes-away.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (42 lines) | stat: -rw-r--r-- 686 bytes parent folder | download | duplicates (2)
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
//
//@ compile-flags: -O
#![crate_type = "lib"]

pub enum Three {
    A,
    B,
    C,
}

#[repr(u16)]
pub enum Four {
    A,
    B,
    C,
    D,
}

#[no_mangle]
pub fn three_valued(x: Three) -> Three {
    // CHECK-LABEL: @three_valued
    // CHECK-NEXT: {{^.*:$}}
    // CHECK-NEXT: ret i8 %0
    match x {
        Three::A => Three::A,
        Three::B => Three::B,
        Three::C => Three::C,
    }
}

#[no_mangle]
pub fn four_valued(x: Four) -> Four {
    // CHECK-LABEL: @four_valued
    // CHECK-NEXT: {{^.*:$}}
    // CHECK-NEXT: ret i16 %0
    match x {
        Four::A => Four::A,
        Four::B => Four::B,
        Four::C => Four::C,
        Four::D => Four::D,
    }
}