Matthias Braun f1b20c5225 MachineRegisterInfo/MIR: Initialize tracksSubRegLiveness early, do not print/parser it ...

tracksSubRegLiveness only depends on the Subtarget and a cl::opt, there
is not need to change it or save/parse it in a .mir file.
Make the field const and move the initialization LiveIntervalAnalysis to the
MachineRegisterInfo constructor. Also cleanup some code and fix some
instances which better use MachineRegisterInfo::subRegLivenessEnabled() instead
of TargetSubtargetInfo::enableSubRegLiveness().

llvm-svn: 279676

2016-08-24 22:17:45 +00:00

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