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llvm/trunk/lib/CodeGen/LiveRegMatrix.cpp
| Show First 20 Lines • Show All 199 Lines • ▼ Show 20 Lines | bool Interference = foreachUnit(TRI, VirtReg, PhysReg, | ||||
| [&](unsigned Unit, const LiveRange &LR) { | [&](unsigned Unit, const LiveRange &LR) { | ||||
| return query(LR, Unit).checkInterference(); | return query(LR, Unit).checkInterference(); | ||||
| }); | }); | ||||
| if (Interference) | if (Interference) | ||||
| return IK_VirtReg; | return IK_VirtReg; | ||||
| return IK_Free; | return IK_Free; | ||||
| } | } | ||||
| bool LiveRegMatrix::checkInterference(SlotIndex Start, SlotIndex End, | |||||
| unsigned PhysReg) { | |||||
| // Construct artificial live range containing only one segment [Start, End). | |||||
| VNInfo valno(0, Start); | |||||
| LiveRange::Segment Seg(Start, End, &valno); | |||||
| LiveRange LR; | |||||
| LR.addSegment(Seg); | |||||
| // Check for interference with that segment | |||||
| for (MCRegUnitIterator Units(PhysReg, TRI); Units.isValid(); ++Units) { | |||||
| if (query(LR, *Units).checkInterference()) | |||||
| return true; | |||||
| } | |||||
| return false; | |||||
| } | |||||