Seems, CLang 3.6/3.7 cannot handle acquire barrier on atomic var correctly
pRec->m_nAccessControl.store( gp_singleton<RCUtag>::instance()->global_control_word(atomics::memory_order_relaxed),
atomics::memory_order_relaxed );
+# if CDS_COMPILER == CDS_COMPILER_CLANG && CDS_COMPILER_VERSION < 30800
+ // Seems, CLang 3.6-3.7 cannot handle acquire barrier correctly
+ CDS_COMPILER_RW_BARRIER;
+# else
// acquire barrier
pRec->m_nAccessControl.load( atomics::memory_order_acquire );
+# endif
}
else {
// nested lock
pRec->m_nAccessControl.store( sh_singleton<RCUtag>::instance()->global_control_word(atomics::memory_order_relaxed),
atomics::memory_order_relaxed );
+# if CDS_COMPILER == CDS_COMPILER_CLANG && CDS_COMPILER_VERSION < 30800
+ // Seems, CLang 3.6-3.7 cannot handle acquire barrier correctly
+ CDS_COMPILER_RW_BARRIER;
+# else
// acquire barrier
pRec->m_nAccessControl.load( atomics::memory_order_acquire );
+# endif
}
else {
// nested lock