On 10/23/2017 11:41 AM, Richard Sandiford wrote: > The GET_MODE_NUNITS patch made vect_grouped_store_supported and > vect_grouped_load_supported check for a constant number of elements, > so vect_permute_store_chain and vect_permute_load_chain can assert > for that. This patch adds commentary to that effect; the actual > asserts will be added by a later, more mechanical, patch. > > The patch also reorganises the function so that the asserts > are linked specifically to code that builds permute vectors > element-by-element. This allows a later patch to add support > for some variable-length permutes. > > > 2017-10-23 Richard Sandiford <richard.sandif...@linaro.org> > Alan Hayward <alan.hayw...@arm.com> > David Sherwood <david.sherw...@arm.com> > > gcc/ > * tree-vect-data-refs.c (vect_permute_store_chain): Reorganize > so that both the length == 3 and length != 3 cases set up their > own permute vectors. Add comments explaining why we know the > number of elements is constant. > (vect_permute_load_chain): Likewise. This is OK. Obviously it can't go in until if/when the whole it is ack'd.
Jeff
