mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-18 03:25:55 +00:00
18 lines
458 B
Rust
18 lines
458 B
Rust
//@ 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
|
|
}
|