[Bug middle-end/70240] [6 Regression] ICE: in gimplify_modify_expr, at gimplify.c:4854 with -ftree-vectorize

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70240

--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Better gimplify a and b before building the COND_EXPR.

But then you undo the fix for PR middle-end/68215, so you make
  c-c++-common/opaque-vector.c
regress again on a bunch of platforms.

Besides gimplification is supposed to be fully recursive.