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da536d4e17
Recurse instead of returning on the first found optimization. Also, return early in the caller instead of continuing because that allows another round of simplification before we might potentially lose undef information from a shuffle mask by eliminating the shuffle. As noted in the review, we could probably do better and be more efficient by moving all of demanded elements into a separate pass, but this is yet another quick fix to instcombine. Differential Revision: https://reviews.llvm.org/D37236 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312248 91177308-0d34-0410-b5e6-96231b3b80d8