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Those patterns are used when the load cannot be folded into the related broadcast during the select phase. This happens when the load gets additional uses that were not anticipated during the previous lowering phases (constant vector to constant load, then constant load reused) or when selection DAG is not able to prove that folding the load will not create a cycle in the DAG. <rdar://problem/16074331> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204631 91177308-0d34-0410-b5e6-96231b3b80d8
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