https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95156
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |11.0
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
CC| |msebor at gcc dot gnu.org
Known to fail| |10.1.0, 11.0, 9.2.0
Keywords| |diagnostic
Last reconfirmed| |2020-05-15
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
In C mode the warning function, warn_tautological_bitwise_comparison (const
op_location_t &loc, tree_code code, tree lhs, tree rhs), gets a BIT_AND_EXPR
while in C++ mode it's passed a NOP_EXPR that casts the result of the same
BIT_AND_EXPR as in C to int. The cast seems pointless since the type of the
BIT_AND_EXPR already is int.
I couldn't find a version where G++ did issue the expected warning so it's not
a regression.
(As an aside, the volatile qualifier isn't necessary to reproduce the bug.)
