[Bug middle-end/54201] XMM constant duplicated

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54201

--- Comment #8 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-08-14 
14:37:42 UTC ---
Does not help the 2nd testcase btw, because we do not CSE the loads:

        movdqa  .LC0, %xmm3
        movdqa  .LC0, %xmm2
        pand    %xmm3, %xmm0
        pcmpeqb %xmm2, %xmm0
        pand    %xmm0, %xmm1
        pand    %xmm3, %xmm1
        movdqa  %xmm1, %xmm0
        pcmpeqb %xmm2, %xmm0
        ret

so it's only half of the issue.