[Bug c/52190] New: question about atomic intrinsics -- test and documentation vary -- please clarify

[mib.bugzilla at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52190

             Bug #: 52190
           Summary: question about atomic intrinsics -- test and
                    documentation vary -- please clarify
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: mib.bugzi...@gmail.com


This url http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html

shows these 2 intrinsics declared like this:
Built-in Function: bool __atomic_always_lock_free (size_t size)
Built-in Function: bool __atomic_is_lock_free (size_t size)

But there are test cases for these 2 functions that have 2nd argument
(memmodel) e.g. atomic-lockfree.c lines 23 and 24

    r1 = __atomic_always_lock_free (sizeof(char), 0); 
    r2 = __atomic_is_lock_free (sizeof(char), 0);

Please clarify, thanks!