- static volatile sys::cas_flag initialized = 0; \
- sys::cas_flag old_val = sys::CompareAndSwap(&initialized, 1, 0); \
- if (old_val == 0) { \
- initialize##passName##PassOnce(Registry); \
- sys::MemoryFence(); \
- initialized = 2; \
- } else { \
- sys::cas_flag tmp = initialized; \
- sys::MemoryFence(); \
- while (tmp != 2) { \
- tmp = initialized; \
- sys::MemoryFence(); \
- } \
- } \
- } \
- static RegisterPass<passName> passName ## _info(arg, name, cfg, analysis); \
- static RegisterAnalysisGroup<agName, def> passName ## _ag(passName ## _info);