diff options
| -rw-r--r-- | llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h | 5 | ||||
| -rw-r--r-- | llvm/lib/CodeGen/LiveIntervalAnalysis.cpp | 15 |
2 files changed, 20 insertions, 0 deletions
diff --git a/llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h b/llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h index 1c61339ed3a..a1fb5b9b5b1 100644 --- a/llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h +++ b/llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h @@ -220,6 +220,11 @@ namespace llvm { I = r2iMap_.insert(I, std::make_pair(reg, createInterval(reg))); return I->second; } + + /// addLiveRangeToEndOfBlock - Given a register and an instruction, + /// adds a live range from that instruction to the end of its MBB. + LiveRange addLiveRangeToEndOfBlock(unsigned reg, + MachineInstr* startInst); // Interval removal diff --git a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp index f184191b937..053e4d272f8 100644 --- a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -1830,3 +1830,18 @@ void LiveIntervals::spillPhysRegAroundRegDefsUses(const LiveInterval &li, } } } + +LiveRange LiveIntervals::addLiveRangeToEndOfBlock(unsigned reg, + MachineInstr* startInst) { + LiveInterval& Interval = getOrCreateInterval(reg); + VNInfo* VN = Interval.getNextValue( + getInstructionIndex(startInst) + InstrSlots::DEF, + startInst, getVNInfoAllocator()); + VN->hasPHIKill = true; + VN->kills.push_back(getMBBEndIdx(startInst->getParent())); + LiveRange LR(getInstructionIndex(startInst) + InstrSlots::DEF, + getMBBEndIdx(startInst->getParent()) + 1, VN); + Interval.addRange(LR); + + return LR; +} |
