[X86] matchPMADDWD/matchPMADDWD_2 - update to use m_ExtractElt matchers. NFC.
[llvm-project.git] / libcxx / test / std / containers / sequences / vector / vector.capacity / empty.verify.cpp
blob4cea844f1e3572bd12fa3dc305b5bacc03cce362
1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
9 // <vector>
11 // class vector
13 // bool empty() const noexcept;
15 // UNSUPPORTED: c++03, c++11, c++14, c++17
17 #include <vector>
19 void f() {
20 std::vector<int> c;
21 c.empty(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}