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From: "dje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/102147] IRA dependent on 32-bit vs 64-bit
 register size
Date: Tue, 31 Aug 2021 15:16:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102147

David Edelsohn <dje at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
                 CC|                            |bergner at gcc dot gnu.org,
                   |                            |vmakarov at gcc dot gnu.org
   Last reconfirmed|                            |2021-08-31

--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
Confirmed.

This was discovered when bootstrapping 64 bit GCC on AIX using 32 bit GCC.

It seems that this should be reproduceable on any system and architecture by
overriding the conflicts data structure encoding choice.=