[Bug target/52496] New: avr-specific built-ins missing memory barrier

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52496

             Bug #: 52496
           Summary: avr-specific built-ins missing memory barrier
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: gjl@gcc.gnu.org
            Target: avr


avr-specific built-in functions like

__builtin_avr_sei
__builtin_avr_cli
__builtin_avr_wdr
__builtin_avr_sleep
__builtin_avr_delay_cycles

are missing memory barriers to avoid reordering against memory accesses.