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| author |  Benjamin Barenblat <bbaren@google.com> | 2021-04-08 10:23:55 -0400 |
|---|---|---|
| committer | Benjamin Barenblat <bbaren@google.com> | 2021-04-08 10:23:55 -0400 |
| commit | feac56827dd1f0d159ea0bcf2ce37ef1990ac743 (patch) | |
| tree | bc8ca767be02a5b22118108f9712b72ec64064c3 /absl/base/macros.h | |
| parent | 2b91b17d526b464840a3f45504c594cdb50152c5 (diff) | |
| parent | 997aaf3a28308eba1b9156aa35ab7bca9688e9f6 (diff) | |
Merge new upstream LTS 20210324.0
Diffstat (limited to 'absl/base/macros.h')
| -rw-r--r-- | absl/base/macros.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/absl/base/macros.h b/absl/base/macros.h index 02dd9ff4..3e085a91 100644 --- a/absl/base/macros.h +++ b/absl/base/macros.h @@ -144,4 +144,15 @@ ABSL_NAMESPACE_END #define ABSL_INTERNAL_RETHROW do {} while (false) #endif // ABSL_HAVE_EXCEPTIONS +// `ABSL_INTERNAL_UNREACHABLE` is an unreachable statement. A program which +// reaches one has undefined behavior, and the compiler may optimize +// accordingly. +#if defined(__GNUC__) || ABSL_HAVE_BUILTIN(__builtin_unreachable) +#define ABSL_INTERNAL_UNREACHABLE __builtin_unreachable() +#elif defined(_MSC_VER) +#define ABSL_INTERNAL_UNREACHABLE __assume(0) +#else +#define ABSL_INTERNAL_UNREACHABLE +#endif + #endif // ABSL_BASE_MACROS_H_ |