File: select_unpredictable.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 (35 lines) | stat: -rw-r--r-- 949 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
//@ compile-flags: -O

#![feature(core_intrinsics)]
#![crate_type = "lib"]

#[no_mangle]
pub fn test_int(p: bool, a: u64, b: u64) -> u64 {
    // CHECK-LABEL: define{{.*}} @test_int
    // CHECK: select i1 %p, i64 %a, i64 %b, !unpredictable
    core::intrinsics::select_unpredictable(p, a, b)
}

#[no_mangle]
pub fn test_pair(p: bool, a: (u64, u64), b: (u64, u64)) -> (u64, u64) {
    // CHECK-LABEL: define{{.*}} @test_pair
    // CHECK: select i1 %p, {{.*}}, !unpredictable
    core::intrinsics::select_unpredictable(p, a, b)
}

struct Large {
    e: [u64; 100],
}

#[no_mangle]
pub fn test_struct(p: bool, a: Large, b: Large) -> Large {
    // CHECK-LABEL: define{{.*}} @test_struct
    // CHECK: select i1 %p, {{.*}}, !unpredictable
    core::intrinsics::select_unpredictable(p, a, b)
}

#[no_mangle]
pub fn test_zst(p: bool, a: (), b: ()) -> () {
    // CHECK-LABEL: define{{.*}} @test_zst
    core::intrinsics::select_unpredictable(p, a, b)
}