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15d82b7d33
fuzz testing. The function which tested for adjacency did what it said on the tin, but when I called it, I wanted it to do something more thorough: I wanted to know if the *pairs* of shuffle elements were adjacent and started at 0 mod 2. In one place I had the decency to try to test for this, but in the other it was completely skipped, miscompiling this test case. Fix this by making the helper actually do what I wanted it to do everywhere I called it (and removing the now redundant code in one place). I *really* dislike the name "canWidenShuffleElements" for this predicate. If anyone can come up with a better name, please let me know. The other name I thought about was "canWidenShuffleMask" but is it really widening the mask to reduce the number of lanes shuffled? I don't know. Naming things is hard. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215089 91177308-0d34-0410-b5e6-96231b3b80d8
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