[Bug c/77490] bit-not (~) on boolean should be warned about

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77490

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Sat Sep 24 09:39:23 2016
New Revision: 240462

URL: https://gcc.gnu.org/viewcvs?rev=240462&root=gcc&view=rev
Log:
        PR c/77490
        * c.opt (Wbool-operation): New.

        * c-typeck.c (build_unary_op): Warn about bit not on expressions that
        have boolean value.  Warn about ++/-- on booleans.

        * typeck.c (cp_build_unary_op): Warn about bit not on expressions that
        have boolean value.

        * doc/invoke.texi: Document -Wbool-operation.

        * c-c++-common/Wbool-operation-1.c: New test.
        * gcc.dg/Wbool-operation-1.c: New test.

Added:
    trunk/gcc/testsuite/c-c++-common/Wbool-operation-1.c
    trunk/gcc/testsuite/gcc.dg/Wbool-operation-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c.opt
    trunk/gcc/c/ChangeLog
    trunk/gcc/c/c-typeck.c
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/typeck.c
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog