void initializeUnreachableMachineBlockElimPass(PassRegistry&);
void initializeVerifierPass(PassRegistry&);
void initializeVirtRegMapPass(PassRegistry&);
+void initializeVirtRegRewriterPass(PassRegistry&);
void initializeInstSimplifierPass(PassRegistry&);
void initializeUnpackMachineBundlesPass(PassRegistry&);
void initializeFinalizeMachineBundlesPass(PassRegistry&);