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In AVX512f we support 64x2 and 32x8 inserts via matching them to 32x4 and 64x4 respectively. These are matched by "Alt" Pat<>'s (Alt stands for alternative VTs). Since DQ has native support for these intructions, I peeled off the non-"Alt" part of the baseclass into vinsert_for_size_no_alt. The DQ instructions are derived from this multiclass. The "Alt" Pat<>'s are disabled with DQ. Fixes <rdar://problem/18426089> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219874 91177308-0d34-0410-b5e6-96231b3b80d8
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