[Bug rtl-optimization/84123] internal compiler error: in gen_rtx_SUBREG, at emit-rtl.c:908, alpha linux.

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84123

--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Segher Boessenkool from comment #2)
> That looks good, please send the patch!
> 
> What about the third case?  The first in the "if" tree.  Does that need
> this as well?  (The third and last case already has a similar check).

Yes, it also calls gen_lowpart_SUBREG without checking. This will result in the
ICE for the reasons, discussed in Comment #1.

I can add the same cure here, although it won't make difference in this
particular testcase.