[PATCH] D99797: [analyzer] Handle intersections and adjacency in RangeSet::Factory::add function

[Denys Petrov via Phabricator via cfe-commits]

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Handle **intersected** and **adjacent** ranges uniting them into a single one.
Example:
intersection `[0, 10] U [5, 20] = [0, 20]`
adjacency `[0, 10] U [11, 20] = [0, 20]`


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D99797

Files:
  clang/include/clang/StaticAnalyzer/Core/PathSensitive/RangedConstraintManager.h
  clang/lib/StaticAnalyzer/Core/RangeConstraintManager.cpp
  clang/unittests/StaticAnalyzer/RangeSetTest.cpp

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