[Bug tree-optimization/70985] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: verify_gimple failed

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70985

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
BIT_FIELD_REF allows non-is_gimple_val first operand, but when it is
transformed into a cast, obviously it needs to be forced into gimple val first.