danielmarjamaki added a comment. I tested this on 2199 debian projects.. and got 16 warnings.
ftp://ftp.se.debian.org/debian/pool/main/t/tf5/tf5_5.0beta8.orig.tar.gz expr.c:738:22: warning: comparisons such as 'a < b != c' do not have their mathematical meaning [-Wparentheses] if (neg0 == neg1 && sum<0 != neg0) { ^~~~~~~~~~~~~ I guess it could be intentional. I haven't looked in the real code. ftp://ftp.se.debian.org/debian/pool/main/m/medusa/medusa_2.1.1.orig.tar.gz cvs.c:111:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ ftp.c:140:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ imap.c:143:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 2) ) ^~~~~~~~~~~~~~ mysql.c:135:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ nntp.c:110:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ pcanywhere.c:133:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ pop3.c:133:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ rexec.c:95:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ rlogin.c:94:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ rsh.c:96:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ smtp.c:135:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ smtp-vrfy.c:114:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ snmp.c:154:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ telnet.c:143:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ vmauthd.c:109:10: warning: comparisons such as 'a <= b <= c' do not have their mathematical meaning [-Wparentheses] if ( !(0 <= argc <= 3) ) ^~~~~~~~~~~~~~ these are surely true positives. http://reviews.llvm.org/D13643 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
