[llvm] [StaleProfileMatching] Use only profile anchor size for similarity calculation (PR #126783)

[via llvm-commits]

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@@ -23,7 +23,7 @@ using namespace sampleprof;
 #define DEBUG_TYPE "sample-profile-matcher"
 
 static cl::opt<unsigned> FuncProfileSimilarityThreshold(
-    "func-profile-similarity-threshold", cl::Hidden, cl::init(80),
+    "func-profile-similarity-threshold", cl::Hidden, cl::init(70),
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WenleiHe wrote:

Is 10% drop meaningful, is 70% final? If so, it's okay to include it here, otherwise the tuning can be done separately. 

https://github.com/llvm/llvm-project/pull/126783