[Bug tree-optimization/112661] [14] RISC-V ICE: in duplicate_and_interleave, at tree-vect-slp.cc:8025 with maxval_char_3.f90 vlen256b since r14-5101-g60034ecf25597b

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112661

--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Sandiford from comment #13)
> In vect_create_constant_vectors, I think the uniform_elt needs
> to come first, and needs to be used irrespective of whether the
> number of elements is constant.  The general tree_vector_builder
> has a more general pattern than 1 duplicated element.

can you take it from here since I have limited means to test?