[Bug target/55947] New: non constant memory models lose HLE qualifiers

[andi-gcc at firstfloor dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55947



             Bug #: 55947

           Summary: non constant memory models lose HLE qualifiers

    Classification: Unclassified

           Product: gcc

           Version: 4.8.0

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: target

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: andi-...@firstfloor.org





get_memmodel does this



 /* If the parameter is not a constant, it's a run time value so we'll just

     convert it to MEMMODEL_SEQ_CST to avoid annoying runtime checking.  */

  if (TREE_CODE (exp) != INTEGER_CST)

    return MEMMODEL_SEQ_CST;



This implies that if __ATOMIC_HLE_ACQUIRE, __ATOMIC_HLE_RELEASE are passed in

as non constant they will get lost.