[PATCH] D36471: [StaticAnalyzer] Try to calculate arithmetic result when operand has a range of possible values

[Daniel Marjamäki via Phabricator via cfe-commits]

danielmarjamaki created this revision.

In the code below the division result should be a value between 5 and 25.

  if (a >= 10 && a <= 50) {
    int b = a / 2;
  }

This patch will calculate results for additions, subtractions and divisions.

I intentionally do not try to handle all possible cases that can be handled. I want to know if my approach is ok.


Repository:
  rL LLVM

https://reviews.llvm.org/D36471

Files:
  include/clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h
  lib/StaticAnalyzer/Core/ExprEngineC.cpp
  lib/StaticAnalyzer/Core/RangeConstraintManager.cpp
  test/Analysis/eval-range.c

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