https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46742
--- Comment #4 from Franz Sirl <sirl at gcc dot gnu.org> --- APPEARS_TO_BE_BOOLEAN_EXPR_P was introduced with r141340 (PR 7543), but I cannot find a discussion on why this suppression makes sense. When I disable it I only see 3 places where it triggers in trunk: gcc/cp/lex.c:115:24: warning: suggest parentheses around operand of '!' or change '&' to '&&' or '!' to '~' [-Wparentheses] libdecnumber/decNumber.c:6036:11: warning: suggest parentheses around operand of '!' or change '&' to '&&' or '!' to '~' [-Wparentheses] libgcc/libgcc2.c:1949:36: warning: suggest parentheses around operand of '!' or change '&' to '&&' or '!' to '~' [-Wparentheses] To my eyes in all 3 cases a '&&' would be clearer, so the warning shouldn't be suppressed? If changing the behaviour of -Wparentheses after this long time is considered a problem, maybe we could add the stricter check to the relatively new -Wlogical-not-parentheses like clang? Note: clang documents -Wlogical-not-parentheses for comparison AND bitwise operators, GCC only for comparison operators.
