[Bug rtl-optimization/88416] [8/9 Regression] ICE in in df_uses_record, at df-scan.c:3013

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88416

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45209
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45209&action=edit
gcc9-pr88416.patch

Untested fix.  The problem are targets like x86 which are not AUTO_INC_DEC, but
still have some patterns that use those expressions (pushes/pops).
As for !AUTO_INC_DEC we just called copy_rtx which does pretty much the same
copying/walking as cleanup_auto_inc_dec, except that the latter will handle
those properly, I think the best fix is just to never use copy_rtx here.