rust/tests/codegen/to_vec.rs

//@ compile-flags: -O

#![crate_type = "lib"]

// CHECK-LABEL: @copy_to_vec
#[no_mangle]
fn copy_to_vec(s: &[u64]) -> Vec<u64> {
    s.to_vec()
    // CHECK: call void @llvm.memcpy
}