[llvm] [StaticDataLayout][PGO]Implement reader and writer change for data access profiles (PR #139997)

[Teresa Johnson via llvm-commits]

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@@ -251,17 +256,26 @@ static Error writeMemProfRadixTreeBased(
   uint64_t RecordTableOffset = writeMemProfRecords(
       OS, MemProfData.Records, &Schema, Version, &MemProfCallStackIndexes);
 
+  uint64_t DataAccessProfOffset = 0;
+  if (DataAccessProfileData.has_value()) {
+    DataAccessProfOffset = OS.tell();
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teresajohnson wrote:

Assert here that the version is high enough?

https://github.com/llvm/llvm-project/pull/139997