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96ac27b20b
We were being too aggressive in trying to combine a shuffle into a blend-with-zero pattern, often resulting in a endless loop of contrasting combines This patch stops the combine if we already have a blend in place (means we miss some domain corrections) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@263717 91177308-0d34-0410-b5e6-96231b3b80d8
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