[PATCH] D38101: [Sema] Diagnose tautological comparison with type's min/max values

[Roman Lebedev via Phabricator via cfe-commits]

lebedev.ri added a comment.

Tried stage2 build, so far only one warning.
But found out that `ubsan_value.h`'s `typedef s128 SIntMax;` crashes this code because

  class LLVM_NODISCARD APSInt : public APInt {
  ...
    /// \brief Get the correctly-extended \c int64_t value.
    int64_t getExtValue() const {
      assert(getMinSignedBits() <= 64 && "Too many bits for int64_t");
      return isSigned() ? getSExtValue() : getZExtValue();
    }


Repository:
  rL LLVM

https://reviews.llvm.org/D38101