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The pass to expand ISEL instructions into if-then-else sequences in patch D23630 is currently disabled. This patch partially enable it by always removing the unnecessary ISELs (all registers used by the ISELs are the same one) and folding the ISELs which have the same input registers into unconditional copies. Differential Revision: https://reviews.llvm.org/D40497 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@320414 91177308-0d34-0410-b5e6-96231b3b80d8
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