[llvm] [SampleFDO] Stale profile call-graph matching (PR #95135)

[via llvm-commits]

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@@ -189,7 +238,9 @@ LocToLocMap SampleProfileMatcher::longestCommonSequence(
         X = V[Index(K - 1)] + 1;
       Y = X - K;
       while (X < Size1 && Y < Size2 &&
-             AnchorList1[X].second == AnchorList2[Y].second)
+             functionMatchesProfile(AnchorList1[X].second,
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WenleiHe wrote:

There is one problem with this -- we're treating similarity based fuzzy matching the same as the exact name matching, and that could lead to undesired result. Ideally, we should have exact matching (by name) done first, then fuzzy match the rest to produce profile name - function name pair. 

https://github.com/llvm/llvm-project/pull/95135