------- Comment #4 from rguenth at gcc dot gnu dot org 2010-03-12 11:20 ------- Candidates to try for -O1 vs. -O2 are -f[no-]tree-vrp, -f[no-]tree-pre, -f[no-]strict-aliasing. You can also rule out inlining effects by -fno-inline.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43340
