[llvm] [SampleFDO] Improve stale profile matching by diff algorithm (PR #87375)

[Lei Wang via llvm-commits]

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@@ -0,0 +1,150 @@
+//===- SampleProfileMatcherTests.cpp - SampleProfileMatcher Unit Tests -----==//
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wlei-llvm wrote:

Got it, removed this unit test and the debug things. 

https://github.com/llvm/llvm-project/pull/87375