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caccc996e2
If we have a LCSSA, only modify the input value if the inval was defined by an instruction in the loop. If defined by something before the loop, it is still valid. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36784 91177308-0d34-0410-b5e6-96231b3b80d8
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