Attributor: Use use_empty instead of getNumUses == 0 (llvm#136339)

Author: arsenm

llvm/lib/Transforms/IPO/Attributor.cpp

@@ -3864,7 +3864,7 @@ static bool runAttributorOnFunctions(InformationCache &InfoCache,
     unsigned FunSize = Functions.size();
     for (unsigned u = 0; u < FunSize; u++) {
       Function *F = Functions[u];
-      if (!F->isDeclaration() && !F->isDefinitionExact() && F->getNumUses() &&
+      if (!F->isDeclaration() && !F->isDefinitionExact() && !F->use_empty() &&
           !GlobalValue::isInterposableLinkage(F->getLinkage())) {
         Function *NewF = Attributor::internalizeFunction(*F);
         assert(NewF && "Could not internalize function.");