| #![crate_type = "lib"] | |
| //@ compile-flags: -O | |
| use std::mem; | |
| fn foo<T>(a: &mut T, b: T) -> bool { | |
| let b = Some(mem::replace(a, b)); | |
| let ret = b.is_some(); | |
| mem::forget(b); | |
| return ret; | |
| } | |
| // CHECK-LABEL: @foo_u32 | |
| // CHECK: store i32 | |
| // CHECK-NEXT: ret i1 true | |
| #[no_mangle] | |
| pub fn foo_u32(a: &mut u32, b: u32) -> bool { | |
| foo(a, b) | |
| } | |
| // CHECK-LABEL: @foo_box | |
| // CHECK: store ptr | |
| // CHECK-NEXT: ret i1 true | |
| #[no_mangle] | |
| pub fn foo_box(a: &mut Box<u32>, b: Box<u32>) -> bool { | |
| foo(a, b) | |
| } |