[Bug c/20550] New: Silencing the warning: comparison is always true due to limited range of data type

["qrczak at knm dot org dot pl" <gcc-bugzilla at gcc dot gnu dot org>]

It would be nice if the warning "comparison is always true due to limited range
of data type" could be turned off. From looking at the gcc source I conclude it
can't. I couldn't find a workaround which generates the same code (casting the
smaller type to the wider type just for the comparison doesn't silence the
warning, using a wider type for the variable generates worse code).

Yet better if it could be turned off locally. I know which comparisons in my C
macro may trigger it, and it would make sense to turn it off only in these places.

-- 
           Summary: Silencing the warning: comparison is always true due to
                    limited range of data type
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: qrczak at knm dot org dot pl
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20550