[Bug target/69421] [6 Regression] ICE in maybe_legitimize_operand, at optabs.c:6888 with -O3

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69421

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Wouldn't a useless_type_conversion_p check be better instead of just testing
number of elements?