Matthias Braun f84547c6e0 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.

This re-applies r260806 with LiveVariables manually added to PowerPC to
hopefully not break the stage 2 bots this time.

llvm-svn: 267954

2016-04-28 23:42:51 +00:00

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