Remove `CallSite` from the CodeMetrics analysis, moving it to the new

`CallBase` and simpler APIs therein.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353673 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/CodeMetrics.h

@@ -16,7 +16,6 @@
 
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/IR/CallSite.h"
 
 namespace llvm {
 class AssumptionCache;

lib/Analysis/CodeMetrics.cpp

@@ -15,7 +15,6 @@
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/Analysis/ValueTracking.h"
-#include "llvm/IR/CallSite.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/Function.h"
 #include "llvm/Support/Debug.h"
@@ -125,14 +124,12 @@ void CodeMetrics::analyzeBasicBlock(const BasicBlock *BB,
       continue;
 
     // Special handling for calls.
-    if (isa<CallInst>(I) || isa<InvokeInst>(I)) {
-      ImmutableCallSite CS(&I);
-
-      if (const Function *F = CS.getCalledFunction()) {
+    if (const auto *Call = dyn_cast<CallBase>(&I)) {
+      if (const Function *F = Call->getCalledFunction()) {
         // If a function is both internal and has a single use, then it is
         // extremely likely to get inlined in the future (it was probably
         // exposed by an interleaved devirtualization pass).
-        if (!CS.isNoInline() && F->hasInternalLinkage() && F->hasOneUse())
+        if (!Call->isNoInline() && F->hasInternalLinkage() && F->hasOneUse())
           ++NumInlineCandidates;
 
         // If this call is to function itself, then the function is recursive.
@@ -147,7 +144,7 @@ void CodeMetrics::analyzeBasicBlock(const BasicBlock *BB,
       } else {
         // We don't want inline asm to count as a call - that would prevent loop
         // unrolling. The argument setup cost is still real, though.
-        if (!isa<InlineAsm>(CS.getCalledValue()))
+        if (!Call->isInlineAsm())
           ++NumCalls;
       }
     }