1 // no-system-llvm
2 // compile-flags: -O -C panic=abort
3 #![crate_type = "lib"]
4
search<T: Ord + Eq>(arr: &mut [T], a: &T) -> Result<usize, ()>5 fn search<T: Ord + Eq>(arr: &mut [T], a: &T) -> Result<usize, ()> {
6 match arr.iter().position(|x| x == a) {
7 Some(p) => {
8 Ok(p)
9 },
10 None => Err(()),
11 }
12 }
13
14 // CHECK-LABEL: @position_no_bounds_check
15 #[no_mangle]
position_no_bounds_check(y: &mut [u32], x: &u32, z: &u32) -> bool16 pub fn position_no_bounds_check(y: &mut [u32], x: &u32, z: &u32) -> bool {
17 // This contains "call assume" so we cannot just rule out all calls
18 // CHECK-NOT: panic_bounds_check
19 if let Ok(p) = search(y, x) {
20 y[p] == *z
21 } else {
22 false
23 }
24 }
25
26 // just to make sure that panicking really emits "panic_bounds_check" somewhere in the IR
27 // CHECK-LABEL: @test_check
28 #[no_mangle]
test_check(y: &[i32]) -> i3229 pub fn test_check(y: &[i32]) -> i32 {
30 // CHECK: panic_bounds_check
31 y[12]
32 }
33