http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35044
--- Comment #5 from Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org> 2012-09-20 02:07:01 UTC --- (In reply to comment #4) > Another testcase for ARC700 is: gcc.c-torture/execute/builtin-bitops-1.c -O1 Sorry, that's a mixup: the above is a testcase of an analogous bug in rtlanal.c:dead_or_set_regno_p . Note that the policy for ambiguous codes like POST_INC, ZERO_EXTRACT or COND_EXEC of mark_set_resources is different from dead_or_set_p: while the former errs on the side of marking something set, the latter (is suspposed to) err(s) on the side of something not entirely killed.
