http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40979
--- Comment #10 from Jack Howarth <howarth at nitro dot med.uc.edu> 2011-01-26 14:20:18 UTC --- (In reply to comment #9) > This pr is not fixed at revision 169261 (gfc). AFAIU -ftree-loop-linear is now > implemented through graphite. This leads to a sort of regression with respect > to revision 169227(gfc6): > > [macbook] lin/test% gfc -Ofast -ftree-loop-linear induct.f90 > [macbook] lin/test% time a.out > /dev/null > 22.380u 0.023s 0:22.40 100.0% 0+0k 0+0io 0pf+0w > [macbook] lin/test% gfc6 -Ofast -ftree-loop-linear induct.f90 > [macbook] lin/test% time a.out > /dev/null > 13.978u 0.019s 0:13.99 99.9% 0+0k 0+0io 0pf+0w Note that -fgraphite-identity still triggers a large number of failures in the vect.exp testsuite when defaulted on at -O2... http://gcc.gnu.org/ml/gcc-testresults/2011-01/msg02005.html so the regression in induct.f90 isn't unique.
