https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65694

ktkachov at gcc dot gnu.org changed:

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

--- Comment #4 from ktkachov at gcc dot gnu.org ---
This looks similar to PR 64600.
The problem seems to be arm_canonicalize_comparison that
canonicalizes a comparison with 2147483647 (0x7fffffff)
into a comparison with that +1, that is 0x80000000 without properly
sign-extending it into 0xffffffff80000000 (which would make it -2147483648).

I have a fix, but it needs more testing

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