Fixed the last fix again: - we cannot remove keep-alives here because only blocks are visited, removing KA requires node visiting - now its clear why always moving Phis from pred block was a bad idea (and was fixed with the strange replace). It must be only done if pred dominated the current block.
Fixed the last fix again:
- we cannot remove keep-alives here because only blocks are visited, removing KA requires node visiting
- now its clear why always moving Phis from pred block was a bad idea (and was fixed with the strange replace). It must be only done if pred dominated the current block.

[r13930]

davidgiven/libfirm,davidgiven/libfirm,jonashaag/libfirm,MatzeB/libfirm,jonashaag/libfirm,jonashaag/libfirm,libfirm/libfirm,MatzeB/libfirm,MatzeB/libfirm,8l/libfirm,jonashaag/libfirm,killbug2004/libfirm,8l/libfirm,MatzeB/libfirm,killbug2004/libfirm,jonashaag/libfirm,libfirm/libfirm,killbug2004/libfirm,libfirm/libfirm,davidgiven/libfirm,killbug2004/libfirm,MatzeB/libfirm,8l/libfirm,killbug2004/libfirm,8l/libfirm,libfirm/libfirm,libfirm/libfirm,8l/libfirm,MatzeB/libfirm,davidgiven/libfirm,8l/libfirm,davidgiven/libfirm,MatzeB/libfirm,8l/libfirm,jonashaag/libfirm,davidgiven/libfirm,killbug2004/libfirm,davidgiven/libfirm,killbug2004/libfirm,jonashaag/libfirm