[Bug target/115452] ICE when dump stv2 for gcc.target/i386/pr70322-2.c with -march=cascadelake

[ubizjak at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115452

--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Hongtao Liu from comment #0)
> ------------cut from i386-features.cc:1056---------------
> 
>       if (dump_file)
>         fprintf (dump_file, "  Preloading operand for insn %d into r%d\n",
>                  INSN_UID (insn), REGNO (tmp));
> --------------cut end-------------------------------
> 
> Looks like tmp is SUBREG.

reg_or_subregno should take care for this.