Function Specialization Registry

[pavle.bulatovic]

Summary

Before this patch, function specialization ID was not printed correctly when printing pass pipeline. This change fixes registering the pass.

[aeubanks]

IR passes for the legacy pass manager (aside from some specific ones that run during codegen) are deprecated and to be removed soon, we shouldn't be fixing deprecated passes

llvm/lib/Transforms/IPO/SCCP.cpp

PreservedAnalyses FunctionSpecializationPass::run(Module &M,
   PA.preserve<PostDominatorTreeAnalysis>();
   PA.preserve<FunctionAnalysisManagerModuleProxy>();
   return PA;
 }
 
 namespace {
 struct FunctionSpecializationLegacyPass : public ModulePass {
   static char ID; // Pass identification, replacement for typeid
-  FunctionSpecializationLegacyPass() : ModulePass(ID) {}
+  explicit FunctionSpecializationLegacyPass() : ModulePass(ID) {
+  initializeFunctionSpecializationLegacyPassPass(*PassRegistry::getPassRegistry());
+  }
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<AssumptionCacheTracker>();
     AU.addRequired<DominatorTreeWrapperPass>();
     AU.addRequired<TargetLibraryInfoWrapperPass>();
     AU.addRequired<TargetTransformInfoWrapperPass>();
   }