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

[Teresa Johnson via llvm-commits]

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@@ -35,4 +35,15 @@ HeapProfileRecords:
         - { Function: 0x7777777777777777, LineOffset: 77, Column: 70, IsInlineFrame: true }
         - { Function: 0x8888888888888888, LineOffset: 88, Column: 80, IsInlineFrame: false }
         CalleeGuids: [ 0x300 ]
+DataAccessProfiles:
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teresajohnson wrote:

Ping on this comment. Can you test that llvm-profdata merge with version set to 3, where the input has the dap profiles, doesn't write out the dap records? That's important for compatibility with existing tooling. Otherwise the patch lgtm

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