[Bug tree-optimization/124826] during GIMPLE pass: bitintlower ICE: verify_gimple failed: non-top-level 'bit_field_ref'

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124826

Drea Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2026-04-09
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

Forward prop changes:
  vector(16) float _2;
  _BitInt(256) _3;

  _2 = u.v;
  _3 = BIT_FIELD_REF <_2, 256, 0>;

into:
  _3 = BIT_FIELD_REF <u.v, 256, 0>;

And bitint does not handle BFRs specially.
Really in theory it could be `MEM<_BitInt(256)>(&u.v)`.