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Summary: When we fold vector constants that are operands of phi's that feed into select, we need to set the correct insertion point for the *new* selects that get generated. The correct insertion point is the incoming block for the phi. Such cases can occur with patch r298845, which fixed folding of vector constants, but the new selects could be inserted incorrectly (as the added test case shows). Reviewers: majnemer, spatel, sanjoy Reviewed by: spatel Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D34162 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305591 91177308-0d34-0410-b5e6-96231b3b80d8