[llvm][NFC][CallSite] Remove CallSite from CGSCCPassManager

[craig.topper]

LGTM

llvm/include/llvm/Analysis/CGSCCPassManager.h

 
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/PriorityWorklist.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Analysis/LazyCallGraph.h"
-#include "llvm/IR/CallSite.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/InstIterator.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/IR/ValueHandle.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 #include <cassert>
auto ScanSCC = [](LazyCallGraph::SCC &C,
 
       SmallDenseMap<Function *, CallCount> CallCounts;
       CallCount CountLocal = {0, 0};
       for (LazyCallGraph::Node &N : C) {
         CallCount &Count =
             CallCounts.insert(std::make_pair(&N.getFunction(), CountLocal))
                 .first->second;
         for (Instruction &I : instructions(N.getFunction()))
-          if (auto CS = CallSite(&I)) {
-            if (CS.getCalledFunction()) {
+          if (auto *CB = dyn_cast<CallBase>(&I)) {
+            if (CB->getCalledFunction()) {
               ++Count.Direct;
             } else {
               ++Count.Indirect;
               CallHandles.push_back(WeakTrackingVH(&I));
             }
           }
       }
 
for (int Iteration = 0;; ++Iteration) {
       // Check that we didn't miss any update scenario.
       assert(!UR.InvalidatedSCCs.count(C) && "Processing an invalid SCC!");
       assert(C->begin() != C->end() && "Cannot have an empty SCC!");
 
       // Check whether any of the handles were devirtualized.
       auto IsDevirtualizedHandle = [&](WeakTrackingVH &CallH) {
         if (!CallH)
           return false;
-        auto CS = CallSite(CallH);
-        if (!CS)
+        auto *CB = dyn_cast<CallBase>(CallH);
+        if (!CB)
           return false;
 
         // If the call is still indirect, leave it alone.
-        Function *F = CS.getCalledFunction();
+        Function *F = CB->getCalledFunction();
         if (!F)
           return false;
 
         LLVM_DEBUG(dbgs() << "Found devirtualized call from "
-                          << CS.getParent()->getParent()->getName() << " to "
+                          << CB->getParent()->getParent()->getName() << " to "
                           << F->getName() << "\n");
 
         // We now have a direct call where previously we had an indirect call,
         // so iterate to process this devirtualization site.
         return true;
       };
       bool Devirt = llvm::any_of(CallHandles, IsDevirtualizedHandle);