| //@ compile-flags: -O | |
| #![crate_type = "lib"] | |
| // Ensure that we do not call `memcpy` for the following function. | |
| // `memset` and `init` should be called directly on the return pointer. | |
| #[no_mangle] | |
| pub fn nrvo(init: fn(&mut [u8; 4096])) -> [u8; 4096] { | |
| // CHECK-LABEL: nrvo | |
| // CHECK: @llvm.memset | |
| // FIXME: turn on nrvo then check-not: @llvm.memcpy | |
| // CHECK: ret | |
| // CHECK-EMPTY | |
| let mut buf = [0; 4096]; | |
| init(&mut buf); | |
| buf | |
| } |