[llvm] [BOLT][NFC] Add sink block to flow CFG in profile inference (PR #95047)

[Amir Ayupov via llvm-commits]

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@@ -640,6 +663,9 @@ void assignProfile(BinaryFunction &BF,
       if (Jump->Flow == 0)
         continue;
 
+      // Skip the artificial sink block
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aaupov wrote:

Can instead use `BlockOrder.size() - 1` to avoid the check on each block.

https://github.com/llvm/llvm-project/pull/95047