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Subject: [Bug target/55139] New: __atomic store does not support __ATOMIC_HLE_RELEASE
Date: Tue, 30 Oct 2012 16:59:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55139

             Bug #: 55139
           Summary: __atomic store does not support __ATOMIC_HLE_RELEASE
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: andi-gcc@firstfloor.org


volatile int slock;

void unlock(void)
{
        int free_val = 1;
        __atomic_store(&slock, &free_val,
__ATOMIC_RELEASE|__ATOMIC_HLE_RELEASE);
}

spin.c: In function 'unlock':
spin.c:6:16: warning: invalid memory model argument 3 of '__atomic_store'
[-Winvalid-memory-model]
  __atomic_store(&slock, &free_val, __ATOMIC_RELEASE|__ATOMIC_HLE_RELEASE);


But XRELEASE MOV ... is allowed in TSX.