------- Comment #4 from rguenth at gcc dot gnu dot org 2008-09-01 14:36 ------- Well, now -Os -funroll-all-loops doesn't do any unrolling anymore while it did before. With -O2 you get what you ask for - unrolled loops.
-funroll-all-loops isn't really a flag to be used in general. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37312
