| //@ compile-flags: -O | |
| #![crate_type = "lib"] | |
| #[no_mangle] | |
| pub fn test() -> u32 { | |
| // CHECK-LABEL: @test( | |
| // CHECK: ret i32 13 | |
| let s = [1, 2, 3, 4, 5, 6, 7]; | |
| let mut iter = s.iter(); | |
| let mut sum = 0; | |
| while let Some(_) = iter.next() { | |
| sum += iter.next().map_or(1, |&x| x) | |
| } | |
| sum | |
| } |