http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54593
--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> 2012-09-15 20:17:24 UTC --- (In reply to comment #4) > I'm not sure if I understand the comment very well; it talks about Pentium 4, > but none of them run 64-bit code, do they? Wrong quote. It should be /* X86_TUNE_INTER_UNIT_MOVES */ ~(m_AMD_MULTIPLE | m_GENERIC),