[Bug target/96814] [11 Regression] wrong code with -march=cascadelake since r11-1445-g502d63b6d6141597

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96814

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, so the extra folding for PR97085 also fixed this testcase, now expanding
from

  _1 = { 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 };
  _2 = .VCOND_MASK (_1, { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0 });
  _3 = VIEW_CONVERT_EXPR<V>(_2);

I still have a patch for the CTOR expansion which I'll test and propose.