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This patch fixes a couple of lowering issues for little endian PowerPC. The code for lowering BUILD_VECTOR contains a number of optimizations that are only valid for big endian. For now, we disable those optimizations for correctness. In the future, we will add analogous optimizations that are correct for little endian. When lowering a SHUFFLE_VECTOR to a VPERM operation, we again need to make the now-familiar transformation of swapping the input operands and complementing the permute control vector. Correctness of this transformation is tested by the accompanying test case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210336 91177308-0d34-0410-b5e6-96231b3b80d8 |
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