__builtin_unreachable  100 Zend/zend_portability.h #elif ((defined(__GNUC__) && ZEND_GCC_VERSION >= 4005) || __has_builtin(__builtin_unreachable)) && PHP_HAVE_BUILTIN_EXPECT
__builtin_unreachable  102 Zend/zend_portability.h 		if (__builtin_expect(!(c), 0)) __builtin_unreachable(); \