2023-10-09 09:05:32 -05:00
|
|
|
// compile-flags: -O
|
2024-01-22 08:46:32 -06:00
|
|
|
// ignore-debug
|
|
|
|
|
// (with debug assertions turned on, `assert_unchecked` generates a real assertion)
|
2023-10-09 09:05:32 -05:00
|
|
|
|
|
|
|
|
#![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]);
|
|
|
|
|
}
|
