> As it looks like, the -fstrict-volatile-bitfields are already totally broken,
I tested your example on rl78-elf, with and without -fstrict-volatile-bitfields, and it generates correct code with it and incorrect code without it. Same for m32c-elf. Same for h8300-elf. Seems to be working OK for me. Either way, if -fstrict-volatile-bitfields does not do what it's supposed to do, the correct action is to fix it - not to disable it on targets that rely on it for correct operation.
