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e64e7c4634
SROA may decide that it needs to insert a bitcast and would set it's insertion point before a PHI. This will create an invalid module right quick. Instead, choose the first insertion point in the basic block that holds our PHI. This fixes PR20822. Differential Revision: http://reviews.llvm.org/D5141 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216891 91177308-0d34-0410-b5e6-96231b3b80d8
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