http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59594
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Jakub Jelinek from comment #2) > (In reply to H.J. Lu from comment #1) > > It is caused by r204062. > > That is only a part of the story, this testcase seems to be interesting. > > Starting with r204062 until r204560 this has been broken because of an ldist > bug. > r204561 fixed that again and the testcase worked until r206147. > r206148 (aka negative step vectorization support) started to ICE on this. > With r206178 it stopped ICEing and works again with -O3 -mtune=generic, not > sure if that has been intentional to change the generic tuning with that > patch. H.J.? There was a typo in r206178 and was fixed by r206180: http://gcc.gnu.org/git/?p=gcc.git;a=commit;h=ff385162ee38caf3100ba4a0f682241c3b0d681d Can you try r206180 on this? > Anyway, with -O3 -mtune=core-avx2 e.g. r206178 still ICEs and r206179 (which > fixed the ICE) starts the miscompilation.
