| // Tests that `unwrap` is optimized out when the slice has a known length. |
| // The iterator may unroll for values smaller than a certain threshold so we |
| // use a larger value to prevent unrolling. |
| |
| //@ compile-flags: -Copt-level=3 |
| |
| #![crate_type = "lib"] |
| |
| // CHECK-LABEL: @infallible_max_not_unrolled |
| #[no_mangle] |
| pub fn infallible_max_not_unrolled(x: &[u8; 1024]) -> u8 { |
| // CHECK-NOT: panic |
| // CHECK-NOT: unwrap_failed |
| *x.iter().max().unwrap() |
| } |
| |
| // CHECK-LABEL: @infallible_max_unrolled |
| #[no_mangle] |
| pub fn infallible_max_unrolled(x: &[u8; 10]) -> u8 { |
| // CHECK-NOT: panic |
| // CHECK-NOT: unwrap_failed |
| *x.iter().max().unwrap() |
| } |
| |
| // CHECK-LABEL: @may_panic_max |
| #[no_mangle] |
| pub fn may_panic_max(x: &[u8]) -> u8 { |
| // CHECK: unwrap_failed |
| *x.iter().max().unwrap() |
| } |
