1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP___ASSERT
11#define _LIBCPP___ASSERT
12
13#include <__config>
14#include <__verbose_abort>
15
16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17#  pragma GCC system_header
18#endif
19
20#define _LIBCPP_ASSERT(expression, message)                                                                            \
21  (__builtin_expect(static_cast<bool>(expression), 1)                                                                  \
22       ? (void)0                                                                                                       \
23       : _LIBCPP_VERBOSE_ABORT(                                                                                        \
24             "%s:%d: assertion %s failed: %s\n", __builtin_FILE(), __builtin_LINE(), #expression, message))
25
26// TODO: __builtin_assume can currently inhibit optimizations. Until this has been fixed and we can add
27//       assumptions without a clear optimization intent, disable that to avoid worsening the code generation.
28//       See https://discourse.llvm.org/t/llvm-assume-blocks-optimization/71609 for a discussion.
29#if 0 && __has_builtin(__builtin_assume)
30#  define _LIBCPP_ASSUME(expression)                                                                                   \
31    (_LIBCPP_DIAGNOSTIC_PUSH _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wassume")                                              \
32         __builtin_assume(static_cast<bool>(expression)) _LIBCPP_DIAGNOSTIC_POP)
33#else
34#  define _LIBCPP_ASSUME(expression) ((void)0)
35#endif
36
37#endif // _LIBCPP___ASSERT
38