------- Additional Comments From sje at cup dot hp dot com 2005-07-19 17:00 ------- It looks like this is a rename-registers issue. I checked in a patch so one could specify -fno-rename-registers (or -fno-web or -fno-gcse-after-reload) in combination with -funroll-loops. Using -fno-web or -fno-gcse-after-reload in combination with -O3 -funroll-loops had no effect but using -fno-rename-registers made the problem go away.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22472