[Bug rtl-optimization/48696] Horrible bitfield code generation on x86

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48696

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-04-20 
12:11:56 UTC ---
(In reply to comment #3)
> So something changed between 4.0.3 and 4.0.4?  Or maybe a typo?

I only have 32bit compilers for both and see, for 4.0.3:

show_bug:
        pushl   %ebp
        movl    %esp, %ebp
        movl    8(%ebp), %edx
        movl    (%edx), %eax
        andl    $-64, %eax
        movl    %eax, (%edx)
        shrl    $6, %eax
        popl    %ebp
        movzwl  %ax, %eax
        ret

and for 4.0.4:

show_bug:
        pushl   %ebp
        movl    %esp, %ebp
        movl    8(%ebp), %eax
        andb    $-64, (%eax)
        movl    (%eax), %eax
        leave
        shrl    $6, %eax
        movzwl  %ax, %eax
        ret