Differential D41585 Diff 132149 llvm/trunk/include/llvm/CodeGen/LiveRegMatrix.h

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llvm/trunk/include/llvm/CodeGen/LiveRegMatrix.h

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};		};

/// Check for interference before assigning VirtReg to PhysReg.		/// Check for interference before assigning VirtReg to PhysReg.
/// If this function returns IK_Free, it is legal to assign(VirtReg, PhysReg).		/// If this function returns IK_Free, it is legal to assign(VirtReg, PhysReg).
/// When there is more than one kind of interference, the InterferenceKind		/// When there is more than one kind of interference, the InterferenceKind
/// with the highest enum value is returned.		/// with the highest enum value is returned.
InterferenceKind checkInterference(LiveInterval &VirtReg, unsigned PhysReg);		InterferenceKind checkInterference(LiveInterval &VirtReg, unsigned PhysReg);

		/// Check for interference in the segment [Start, End) that may prevent
		/// assignment to PhysReg. If this function returns true, there is
		/// interference in the segment [Start, End) of some other interval already
		/// assigned to PhysReg. If this function returns false, PhysReg is free at
		/// the segment [Start, End).
		bool checkInterference(SlotIndex Start, SlotIndex End, unsigned PhysReg);

/// Assign VirtReg to PhysReg.		/// Assign VirtReg to PhysReg.
/// This will mark VirtReg's live range as occupied in the LiveRegMatrix and		/// This will mark VirtReg's live range as occupied in the LiveRegMatrix and
/// update VirtRegMap. The live range is expected to be available in PhysReg.		/// update VirtRegMap. The live range is expected to be available in PhysReg.
void assign(LiveInterval &VirtReg, unsigned PhysReg);		void assign(LiveInterval &VirtReg, unsigned PhysReg);

/// Unassign VirtReg from its PhysReg.		/// Unassign VirtReg from its PhysReg.
/// Assuming that VirtReg was previously assigned to a PhysReg, this undoes		/// Assuming that VirtReg was previously assigned to a PhysReg, this undoes
/// the assignment and updates VirtRegMap accordingly.		/// the assignment and updates VirtRegMap accordingly.
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