gcc 3.4.x generates a bit suboptimal code on the below fragment.
gcc 4.x generates code which is a bit more suboptimal.

unsigned v;
void g(unsigned A)
/* gcc -O2 -fomit-frame-pointer -S:
gcc-3.4.3, 3.4.6:
        movl    $-858993459, %eax
        mull    4(%esp)
        movl    %edx, %eax	// huh?
        shrl    $3, %eax
        movl    %eax, v
        ret
gcc-4.0.0,4.1.1:
        movl    $-858993459, %eax
        mull    4(%esp)
        movl    %edx, %eax	// huh?
        xorl    %edx, %edx	// huh??
        shrl    $3, %eax
        movl    %eax, v
        ret
*/
{
	v = (A * 3435973837ULL) >> 35;
}