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Author SHA1 Message Date
Chris Lattner
92c6bd2c45 rewrite OptimizeAwayTrappingUsesOfLoads to 1) avoid a temporary 
vector and extraneous loop over it, 2) not delete globals used by
phis/selects etc which could actually be useful.  This fixes PR3321.
Many thanks to Duncan for narrowing this down.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62201 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-14 00:12:58 +00:00