[Bug target/104666] [12 Regression] ICE in related_vector_mode, at stor-layout.c:537

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104666

--- Comment #3 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Hongtao.liu from comment #2)
> So builtins are registered in the beginning, but isa checking is during
> pass_expand, and gimple folding is between them, maybe we should restrict
> builtin gimple folding under their required target.

I'm testing this.

+         /* Avoid ICE in get_same_size_vectype which assumes real vector
+            mode, and it depends on vector_mode_supported_p, E_BLKmode
+            means target isa mismatch.  */
+         if (TYPE_MODE (type) == E_BLKmode)
+           break;