[Bug middle-end/65409] [4.8/4.9/5 Regression] ICE in store_field

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65409

--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
The difference is that we go through a pseudo with my version, but the code is
optimal at -O1:

    call    _Z8copy_foo3Foo
    movq    %rax, a(%rip)
    movb    %dl, a+8(%rip)

and the change looks safe enough for all the branches.