Matthias Braun 7eaa93aa2b LiveIntervalAnalysis: Remove LiveVariables requirement
This requirement was a huge hack to keep LiveVariables alive because it
was optionally used by TwoAddressInstructionPass and PHIElimination.
However we have AnalysisUsage::addUsedIfAvailable() which we can use in
those passes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260806 91177308-0d34-0410-b5e6-96231b3b80d8
2016-02-13 04:35:31 +00:00
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