------- Comment #8 from pluto at agmk dot net 2006-09-20 20:44 ------- (In reply to comment #7) > and one more misscompiled program -> gzip-1.3.5. > this time 4.1.2 with -O2 -fwrapv produces wrong code. > > $ dd if=/dev/zero of=foo count=10 > $ gzip foo > $ gzip -d foo.gz > $ gzip: foo.gz: invalid compressed data--format violated
further investigation shows that only `-O1 -ftree-vrp -fwrapv' miscompiles the gzip/inflate.o. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28230
