Re: [PATCH] fix detection of negative step DR groups

2020-07-08 Thread Richard Biener
On Tue, 7 Jul 2020, Richard Sandiford wrote: > Richard Biener writes: > > This fixes a condition that caused all negative step DR groups to > > be detected as single element interleaving. Such groups are > > rejected by interleaving vectorization but miscompiled by SLP > > which is fixed by forc

Re: [PATCH] fix detection of negative step DR groups

2020-07-07 Thread Richard Sandiford
Richard Biener writes: > This fixes a condition that caused all negative step DR groups to > be detected as single element interleaving. Such groups are > rejected by interleaving vectorization but miscompiled by SLP > which is fixed by forcing VMAT_STRIDED_SLP for now. > > Bootstrap & regtest ru