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- ``-Wtautological-compare`` now warns about comparing a signed integer and 0 - ``-Wtautological-compare`` now warns about comparing a signed integer and 0
when the signed integer is coerced to an unsigned type for the comparison. when the signed integer is coerced to an unsigned type for the comparison.
``-Wsign-compare`` was adjusted not to warn in this case. ``-Wsign-compare`` was adjusted not to warn in this case.
- ``-Wtautological-constant-compare`` is a new warning that warns on - ``-Wtautological-constant-compare`` is a new warning that warns on
tautological comparisons between integer variable of the type ``T`` and the tautological comparisons between integer variable of the type ``T`` and the
largest/smallest possible integer constant of that same type. largest/smallest possible integer constant of that same type.
If the tautologicalness of the comparison is data model dependent, then the
``-Wmaybe-tautological-constant-compare`` (disabled by default) is used.
- For C code, ``-Wsign-compare``, ``-Wsign-conversion``, - For C code, ``-Wsign-compare``, ``-Wsign-conversion``,
``-Wtautological-constant-compare`` and ``-Wtautological-constant-compare`` and
``-Wtautological-constant-out-of-range-compare`` were adjusted to use the ``-Wtautological-constant-out-of-range-compare`` were adjusted to use the
underlying datatype of ``enum``. underlying datatype of ``enum``.
- ``-Wnull-pointer-arithmetic`` now warns about performing pointer arithmetic - ``-Wnull-pointer-arithmetic`` now warns about performing pointer arithmetic
on a null pointer. Such pointer arithmetic has an undefined behavior if the on a null pointer. Such pointer arithmetic has an undefined behavior if the
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