+void initializeVirtRegRewriterPass(PassRegistry&);
+void initializeInstSimplifierPass(PassRegistry&);
+void initializeUnpackMachineBundlesPass(PassRegistry&);
+void initializeFinalizeMachineBundlesPass(PassRegistry&);
+void initializeBBVectorizePass(PassRegistry&);
+void initializeMachineFunctionPrinterPassPass(PassRegistry&);