rust/tests/codegen/vec-reserve-extend.rs
2023-11-02 00:52:06 +00:00

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]);
}