[Bug target/118795] [15 Regression] ICE when building darkradiant-3.9.0 (with PCH?) (expand_expr_real_2, at expr.cc:10975)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118795

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #10)
> typedef unsigned char V __attribute__((vector_size (16)));
> 
> V
> foo (V x)
> {
>   return __builtin_shuffle (x, x, (V) { 0, 0, 0, 0, 4, 4, 4, 4, 8, 8, 8, 8,
> 12, 12, 12, 12 });
> }
> compiles fine.

Yes, that's lowered then.  I suspect sth post veclower introduces this
(folding, forwprop).