[clang] [analyzer] Introduce per-entry-point statistics (PR #131175)

[Arseniy Zaostrovnykh via cfe-commits]

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+===================
+Analysis Statistics
+===================
+
+CSA enjoys two facilities to collect statistics: per translation unit and per entry point.
+We use llvm/ADT/Statistic.h for numbers describing the entire translation unit (TU).
+We use clang/StaticAnalyzer/Core/PathSensitive/EntryPointStats.h to collect data for each symbolic-execution entry point.
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necto wrote:

Added hyperlinks as @NagyDonat suggested:
788465ab8371 origin/az/CPP-6160-ep-stats Hyperlink the documentation


https://github.com/llvm/llvm-project/pull/131175