-//===---------------------------------------------------------------------------
-/// PassInfo class - An instance of this class exists for every pass known by
-/// the system, and can be obtained from a live Pass by calling its
-/// getPassInfo() method. These objects are set up by the RegisterPass<>
-/// template, defined below.
-///
-class PassInfo {
-public:
- typedef Pass* (*NormalCtor_t)();
-
-private:
- const char *const PassName; // Nice name for Pass
- const char *const PassArgument; // Command Line argument to run this pass
- const void *PassID;
- const bool IsCFGOnlyPass; // Pass only looks at the CFG.
- const bool IsAnalysis; // True if an analysis pass.
- const bool IsAnalysisGroup; // True if an analysis group.
- std::vector<const PassInfo*> ItfImpl;// Interfaces implemented by this pass
-
- NormalCtor_t NormalCtor;
-
-public:
- /// PassInfo ctor - Do not call this directly, this should only be invoked
- /// through RegisterPass.
- PassInfo(const char *name, const char *arg, const void *pi,
- NormalCtor_t normal, bool isCFGOnly, bool is_analysis)
- : PassName(name), PassArgument(arg), PassID(pi),
- IsCFGOnlyPass(isCFGOnly),
- IsAnalysis(is_analysis), IsAnalysisGroup(false), NormalCtor(normal) { }
- /// PassInfo ctor - Do not call this directly, this should only be invoked
- /// through RegisterPass. This version is for use by analysis groups; it
- /// does not auto-register the pass.
- PassInfo(const char *name, const void *pi)
- : PassName(name), PassArgument(""), PassID(pi),
- IsCFGOnlyPass(false),
- IsAnalysis(false), IsAnalysisGroup(true), NormalCtor(0) { }
-
- /// getPassName - Return the friendly name for the pass, never returns null
- ///
- const char *getPassName() const { return PassName; }
-
- /// getPassArgument - Return the command line option that may be passed to
- /// 'opt' that will cause this pass to be run. This will return null if there
- /// is no argument.
- ///
- const char *getPassArgument() const { return PassArgument; }
-
- /// getTypeInfo - Return the id object for the pass...
- /// TODO : Rename
- const void *getTypeInfo() const { return PassID; }
+class TargetMachine;
+
+#define CALL_ONCE_INITIALIZATION(function) \
+ static volatile sys::cas_flag initialized = 0; \
+ sys::cas_flag old_val = sys::CompareAndSwap(&initialized, 1, 0); \
+ if (old_val == 0) { \
+ function(Registry); \
+ sys::MemoryFence(); \
+ TsanIgnoreWritesBegin(); \
+ TsanHappensBefore(&initialized); \
+ initialized = 2; \
+ TsanIgnoreWritesEnd(); \
+ } else { \
+ sys::cas_flag tmp = initialized; \
+ sys::MemoryFence(); \
+ while (tmp != 2) { \
+ tmp = initialized; \
+ sys::MemoryFence(); \
+ } \
+ } \
+ TsanHappensAfter(&initialized);