Dan Gohman e26025ddd0 When rotating loops, put the original header at the bottom of the
loop, making the resulting loop significantly less ugly.  Also, zap
its trivial PHI nodes, since it's easy.

llvm-svn: 111255
2010-08-17 17:39:21 +00:00
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2010-08-15 07:07:24 +00:00