[PATCH] D140086: [analyzer][solver] Improve reasoning for not equal to operator

[Manas Gupta via Phabricator via cfe-commits]

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This patch fixes certain cases where solver was not able to infer
disequality due to overlapping of values in rangeset. This case was
casting from lower signed type to bigger unsigned type.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D140086

Files:
  clang/lib/StaticAnalyzer/Core/RangeConstraintManager.cpp
  clang/test/Analysis/constant-folding.c

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