-#ifndef FOLLY_BASE_ASSUME_H_
-#define FOLLY_BASE_ASSUME_H_
-
-#include <folly/Portability.h>
-#include <glog/logging.h>
-
-namespace folly {
-
-/**
- * Inform the compiler that the argument can be assumed true. It is
- * undefined behavior if the argument is not actually true, so use
- * with care.
- *
- * Implemented as a function instead of a macro because
- * __builtin_assume does not evaluate its argument at runtime, so it
- * cannot be used with expressions that have side-effects.
- */
-
-FOLLY_ALWAYS_INLINE void assume(bool cond) {
-#ifndef NDEBUG
- DCHECK(cond);
-#elif defined(__clang__) // Must go first because Clang also defines __GNUC__.
- __builtin_assume(cond);
-#elif defined(__GNUC__)
- if (!cond) { __builtin_unreachable(); }
-#else
- // Do nothing.
-#endif
-}
-
-} // namespace folly
-
-#endif