mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-02 07:22:42 +00:00
15 lines
373 B
Rust
15 lines
373 B
Rust
|
// compile-flags: -O
|
||
|
|
|
||
|
|
#![crate_type = "lib"]
|
||
|
|
|
||
|
|
// CHECK-LABEL: @should_reserve_once
|
||
|
|
#[no_mangle]
|
||
|
|
pub fn should_reserve_once(v: &mut Vec<u8>) {
|
||
|
|
// CHECK: tail call void @llvm.assume
|
||
|
|
v.try_reserve(3).unwrap();
|
||
|
|
// CHECK-NOT: call {{.*}}reserve
|
||
|
|
// CHECK-NOT: call {{.*}}do_reserve_and_handle
|
||
|
|
// CHECK-NOT: call {{.*}}__rust_alloc(
|
||
|
|
v.extend([1, 2, 3]);
|
||
|
|
}
|