[PATCH] D10910: RAGreedy: Keep track of allocated PhysRegs internally

[Matthias Braun]

MatzeB created this revision.
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Do not use MachineRegisterInfo::setPhysRegUsed()/isPhysRegUsed()
anymore. This bitset changes function-global state and is set by the
VirtRegRewriter anyway.
Simply use a bitvector private to RAGreedy.

rL LLVM

http://reviews.llvm.org/D10910

Files:
  lib/CodeGen/RegAllocGreedy.cpp

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