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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug jit/99126] Compilation ICE trying insert trap
Date: Wed, 17 Feb 2021 08:18:17 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99126

Martin Li=C5=A1ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-02-17
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
                 CC|                            |marxin at gcc dot gnu.org

--- Comment #2 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
Thanks for the report.

> This is my understanding of what is going on here: we have a some
> generated code that in GIMPLE is proved to dereference a null pointer
> (BTW this code should be unreachable).

That's fine.

>=20
> MEM[(struct comp_Lisp_Cons *)0B].u.s.car =3D _35;
>=20

So I guess JIT should really initialize the builtins.
I tried manually calling:
gcc_jit_context_get_builtin_function (ctxt_0x8892590, "__builtin_trap");

and then your reproducer is fine.
Leaving to David.=