------- Comment #9 from sandra at codesourcery dot com 2010-07-07 01:09 ------- Yes, this is on an Ubuntu system, but one of my co-workers says GCC multilibs work with Ubuntu now; the support is in gcc/config/i386/t-linux64. Me, I'm clueless about anything configury-related. :-( I can try again on another machine, but this being my third try already, I'm not terribly confident I'll get it right the next time, either. Frankly I do not see what effect Ubuntu vs non-Ubuntu multilib arrangements would have to do with ivopts behavior anyway.
Can you try out my -fno-ivopts example in the configuration you found the original problem in? That would rule out my cluelessness in configuring the toolchain as a source of differing behavior, at least. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44838
