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Move TargetRegisterInfo::getSubReg() to MCRegisterInfo.

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Allows us to de-virtualize the function and provides access to it in
the instruction printer, which is useful for handling composite
physical registers (e.g., ARM register lists).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151815 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2012-03-01 17:30:39 +00:00
parent 194f3fa9ea
commit b3acdcc00c
3 changed files with 71 additions and 57 deletions
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5
include/llvm/Target/TargetRegisterInfo.h
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@@ -383,11 +383,6 @@ public:
/// used by register scavenger to determine what registers are free.
virtual BitVector getReservedRegs(const MachineFunction &MF) const = 0;
/// getSubReg - Returns the physical register number of sub-register "Index"
/// for physical register RegNo. Return zero if the sub-register does not
/// exist.
virtual unsigned getSubReg(unsigned RegNo, unsigned Index) const = 0;
/// getSubRegIndex - For a given register pair, return the sub-register index
/// if the second register is a sub-register of the first. Return zero
/// otherwise.