------- Comment #6 from changpeng dot fang at amd dot com 2010-05-28 16:46 ------- (In reply to comment #4) > Created an attachment (id=20767) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20767&action=view) [edit] > Patch that makes loop invariant prefetches backend specfic >
Actually, I am the one who would like the invariant step prefetch to be backend independent. However, the current implementation seems a bit aggressive: The fundamental assumption of the implementation is that the invariant step is big enough so that there is no spatial reuse and we don't need to unroll the loop (preprech_mod == 1). This assumption may be OK for c code (or integer code), and may not be appropriate for fortran programs. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44297
