[Bug target/69247] [6 Regression] ICE in gen_reg_rtx, at emit-rtl.c:1024 on s390x-linux-gnu

[krebbel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69247

Andreas Krebbel <krebbel at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Assignee|unassigned at gcc dot gnu.org      |krebbel at gcc dot 
gnu.org

--- Comment #3 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Created attachment 37327
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37327&action=edit
Tested fix

I've already bootstrapped and regtested the attached fix. simplify_gen_subreg
should handle all the cases correctly. I also did a quick code comparison with
SpecCPU2006. There are no additional instructions being generated.