| //@ compile-flags: -O | |
| #![crate_type = "lib"] | |
| // CHECK-LABEL: @test | |
| // CHECK-NEXT: start: | |
| // CHECK-NEXT: tail call void @ext_fn0() | |
| #[no_mangle] | |
| pub fn test() { | |
| test_inner(Some(inner0)); | |
| } | |
| fn test_inner(f_maybe: Option<fn()>) { | |
| if let Some(f) = f_maybe { | |
| f(); | |
| } | |
| } | |
| fn inner0() { | |
| unsafe { ext_fn0() }; | |
| } | |
| extern "C" { | |
| fn ext_fn0(); | |
| } |