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Author SHA1 Message Date
Arnaud A. de Grandmaison
eb9a42e8ab IndVarSimplify: do not recompute an IV value outside of the loop if : 
- it is trivially known to be used inside the loop in a way that can not be optimized away
- there is no use outside of the loop which can take advantage of the computation hoisting

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177432 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-03-19 20:00:22 +00:00