[Bug target/14552] compiled trivial vector intrinsic code is inefficient

[astrange at ithinksw dot com]

------- Comment #25 from astrange at ithinksw dot com  2008-03-19 19:39 -------
Actually the first generates-
        subl    $12, %esp
        movq    _w, %mm0
        paddw   %mm0, %mm0
        movq    %mm0, _w
        movq    _w, %mm0
        movq    %mm0, _dw
        addl    $12, %esp
        ret

which is better than the code in the original report but still has a useless
store/reload.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14552