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be9ee96926
vperm2* intrinsics are just shuffles. In a few special cases, they're not even shuffles. Optimizing intrinsics in InstCombine is better than handling this in the front-end for at least two reasons: 1. Optimizing custom-written SSE intrinsic code at -O0 makes vector coders really angry (and so I have regrets about some patches from last week). 2. Doing mask conversion logic in header files is hard to write and subsequently read. There are a couple of TODOs in this patch to complete this optimization. Differential Revision: http://reviews.llvm.org/D8486 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232852 91177308-0d34-0410-b5e6-96231b3b80d8 |
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