Re: Fix PR87074: miscompilation with unroll-and-jam

2018-08-31 Thread Jakub Jelinek
On Fri, Aug 31, 2018 at 04:31:09PM +0200, Richard Biener wrote: > On August 31, 2018 4:11:26 PM GMT+02:00, Michael Matz wrote: > >Hi, > > > >as Jakub correctly identified, uses of values produced by the inner > >loop > >that occur inside the outer loop prevent fusion as well. We are > >in LCSSA

Re: Fix PR87074: miscompilation with unroll-and-jam

2018-08-31 Thread Richard Biener
On August 31, 2018 4:11:26 PM GMT+02:00, Michael Matz wrote: >Hi, > >as Jakub correctly identified, uses of values produced by the inner >loop >that occur inside the outer loop prevent fusion as well. We are >in LCSSA so the check is easy. (Uses outside the outer loop are okay, >see >the comm