------- Additional Comments From ebotcazou at gcc dot gnu dot org 2004-12-13 11:02 ------- Hum... the problem lies in the old loop optimizer, which indeed doesn't care about optimization barriers. This apparently had had very limited consequences until we started to emit them more frequently as part of the stopgap solution for the RTX_UNCHANGING_P. We might need to resort to disabling all optimizations if we detect such a barrier in a loop.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16968
