[llvm] [memprof] Add Version2 of the indexed MemProf format (PR #89100)

[Kazu Hirata via llvm-commits]

================
@@ -374,6 +385,19 @@ IndexedMemProfRecord makeRecord(
   return MR;
 }
 
+IndexedMemProfRecord
+makeRecordV2(std::initializer_list<::llvm::memprof::CallStackId> AllocFrames,
+             std::initializer_list<::llvm::memprof::CallStackId> CallSiteFrames,
+             const MemInfoBlock &Block = MemInfoBlock()) {
+  llvm::memprof::IndexedMemProfRecord MR;
+  for (const auto &CSId : AllocFrames)
+    MR.AllocSites.emplace_back(::llvm::SmallVector<memprof::FrameId>(), CSId,
----------------
kazutakahirata wrote:

We don't populate `IndexedAllocationInfo::CallStack` because we use it only in `Version0` and `Version1`.

https://github.com/llvm/llvm-project/pull/89100