------- Comment #2 from sam at gcc dot gnu dot org 2008-08-06 15:39 ------- The warning comes from a range check which is emitted by Gigi. The backend knows that this check is useless, and warns about it. As far as I can tell, there is no way to suppress the warning in shorten_compare (c-common.c), except by setting a global option (OPT_Wtype_limits) to false.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37038
