[llvm] [MemProf] Extend CallSite information to include potential callees. (PR #130441)

[Kazu Hirata via llvm-commits]

================
@@ -241,9 +241,11 @@ MemProfRecord IndexedMemProfRecord::toMemProfRecord(
     Record.AllocSites.push_back(std::move(AI));
   }
 
-  Record.CallSites.reserve(CallSiteIds.size());
-  for (CallStackId CSId : CallSiteIds)
-    Record.CallSites.push_back(Callback(CSId));
+  Record.CallSites.reserve(CallSites.size());
+  for (const IndexedCallSiteInfo &CS : CallSites) {
+    std::vector<Frame> Frames = Callback(CS.CSId);
+    Record.CallSites.push_back(CallSiteInfo(std::move(Frames), CS.CalleeGuids));
----------------
kazutakahirata wrote:

May I suggest `emplace_back` to construct the new element in place?

https://github.com/llvm/llvm-project/pull/130441