[llvm] Implements PGOBBAddrMap in Object and ObjectYAML with tests [1/5] (PR #71750)

[Rahman Lavaee via llvm-commits]

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@@ -706,10 +718,21 @@ ELFFile<ELFT>::decodeBBAddrMap(const Elf_Shdr &Sec,
       if (Version > 2)
         return createError("unsupported SHT_LLVM_BB_ADDR_MAP version: " +
                            Twine(static_cast<int>(Version)));
-      Data.getU8(Cur); // Feature byte
+      Feature = Data.getU8(Cur); // Feature byte
+      FuncEntryCountEnabled =
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rlavaee wrote:

How about defining a bit-field struct for these (similar to `BBEntry::Metadata`) and implement encode and decode there?

https://github.com/llvm/llvm-project/pull/71750