Jakob Stoklund Olesen a2136be107 Use a SparseSet instead of a BitVector for UsedInInstr in RAFast. ...

This is just as fast, and it makes it possible to avoid leaking the
UsedPhysRegs BitVector implementation through
MachineRegisterInfo::addPhysRegsUsed().

llvm-svn: 166083

2012-10-17 01:37:59 +00:00

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