Minor CG performance improvement

Author: fabianbs96

lib/PhasarLLVM/ControlFlow/Resolver/OTFResolver.cpp

@@ -140,13 +140,17 @@ auto OTFResolver::resolveFunctionPointer(const llvm::CallBase *CallSite)
     if (const auto *FTy = llvm::dyn_cast<llvm::FunctionType>(
             CallSite->getCalledOperand()->getType()->getPointerElementType())) {
 
-      const auto PTS =
+      const auto *PTS =
           PT.getPointsToSet(CallSite->getCalledOperand(), CallSite);
 
       llvm::SmallVector<const llvm::GlobalVariable *, 2> GlobalVariableWL;
       llvm::SmallVector<const llvm::ConstantAggregate *> ConstantAggregateWL;
 
       for (const auto *P : *PTS) {
+        if (!llvm::isa<llvm::Constant>(P)) {
+          continue;
+        }
+
         GlobalVariableWL.clear();
         ConstantAggregateWL.clear();
 

lib/PhasarLLVM/Pointer/LLVMPointsToSet.cpp

@@ -52,6 +52,9 @@ namespace psr {
 LLVMPointsToSet::LLVMPointsToSet(ProjectIRDB &IRDB, bool UseLazyEvaluation,
                                  PointerAnalysisType PATy)
     : PTA(IRDB, UseLazyEvaluation, PATy), Owner(IRDB.getNumGlobals()) {
+
+  PointsToSets.reserve(IRDB.getNumGlobals());
+
   for (llvm::Module *M : IRDB.getAllModules()) {
     // compute points-to information for all globals