[Bug target/106704] [12/13 Regression] avx intrinsic not generating vblendvps instruction with -mavx

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106704

--- Comment #8 from Hongtao.liu <crazylht at gmail dot com> ---
  _5 = VIEW_CONVERT_EXPR<vector(8) int>(mask_4(D));
  _6 = _5 < { 0, 0, 0, 0, 0, 0, 0, 0 };
  _7 = VEC_COND_EXPR <_6, b_3(D), a_2(D)>;

It's lowered ly veclower since vcondv8sfv8si and vec_cmpv8si is define under
AVX2.

vec_cmpv8si is defined under avx2 since vpcmpeqd/vpcmpgtq is defined under
AVX2.