------- Comment #8 from rguenther at suse dot de 2010-05-16 11:04 ------- Subject: Re: -fwhole-file -fwhole-program: Wrong decls cause too much to be optimized away
On Sun, 16 May 2010, dominiq at lps dot ens dot fr wrote: > ------- Comment #7 from dominiq at lps dot ens dot fr 2010-05-16 11:00 > ------- > > -fwhole-program enables -fwhole-file. > > Yes, but -fwhole-file does not enable -fwhole-program. All the polyhedron > tests > pass with -fwhole-file (and say -O3 -ffast-math), but the test in comment #4 > fails with -whole-file. -fwhole-file cannot enable -fwhole-program. -fwhole-program says to the optimizers that they do see the whole program - all callers to functions defined in the current TU have to be visible (and have correct callgraph edges, thus -fwhole-file). You cant' compare -fwhole-file numbers to -fwhole-program numbers. -fwhole-file is a correctness option, w/o it the Frontend generates an invalid representation for the middle-end. Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40873
