http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53176
--- Comment #3 from Uros Bizjak <ubizjak at gmail dot com> 2012-05-02 17:58:17 UTC --- (In reply to comment #1) > Lower-subreg is most likely a terrible transformation to do on later x86s but > is likely to have been useful on the earlier ones. So this regression is > likely a good thing. Can you please suggest, what should be added to leave decisions as they were? We would like to fine tune the cost model in a controlled way, supported by the data from benchmarks and applications. Forced under-the-hood changes to cost model just don't fit this approach.
