https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115464
--- Comment #10 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Thanks for the fix, but I don't think it's sufficient.
what I meant with the earlier comment was that the subregs are broken in
general, so not just the one generated by the undef fast path.
i.e.
#include <arm_neon.h>
#include <arm_sve.h>
#include <arm_neon_sve_bridge.h>
svuint16_t
convolve4_4_x (uint16x8x2_t permute_tbl, svuint16_t a)
{
return svset_neonq_u16 (a, permute_tbl.val[1]);
}
seems to still ICE for me because it goes into the general expander which
produces the same subreg.
