[compiler-rt] [llvm] [InstrFDO]Allow indexed profile reader to parse compatible future versions and returns errors for incompatible ones. (PR #88212)

[Mingming Liu via llvm-commits]

minglotus-6 wrote:

With the clean-ups like https://github.com/llvm/llvm-project/pull/93346 and https://github.com/llvm/llvm-project/pull/93594, this patch is much simpler than its previous version (thanks to `readNext` and back patching once). PTAL, thanks!

https://github.com/llvm/llvm-project/pull/88212