http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52203
--- Comment #5 from Uros Bizjak <ubizjak at gmail dot com> 2012-02-13 16:00:27 UTC --- (In reply to comment #4) > The bugs you are referring to were real bugs, where wrong or missing operand > was accessed from attribute calculation machinery. ... and PR 49014, where indeed insn without reservation crashed scheduler in the same way. But there was a clear inconsistency in the model, so we got away with the adjustment.