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Commit f52351e5 authored by Owen Anderson's avatar Owen Anderson
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Make LoopUnswitch able to unswitch loops with live-out values by taking advantage 

of LCSSA.  This results several times the number of unswitchings occurring on
tests such and timberwolfmc, unix-tbl, and ldecod.

llvm-svn: 28912
parent 38c5aee9
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