[PATCH] D85256: Add -Wtautological-value-range-compare warning.

[Stephan Bergmann via Phabricator via cfe-commits]

sberg added a comment.

I think this generates a false positive with `test.cc`

  enum E { E1 = 1, E2 = 2 };
  bool f(E e) { return ((e & E1) ? 1 : 0) + ((e & E2) ? 1 : 0) > 1; }

and `clang++ -fsyntax-only -Wtautological-value-range-compare test.cc`

  test.cc:2:62: warning: result of comparison of 1-bit unsigned value > 1 is always false [-Wtautological-value-range-compare]
  bool f(E e) { return ((e & E1) ? 1 : 0) + ((e & E2) ? 1 : 0) > 1; }
                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~


Repository:
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  https://reviews.llvm.org/D85256/new/

https://reviews.llvm.org/D85256