-namespace {
-
-/// Falls back on LiveIntervals::addIntervalsForSpills.
-class StandardSpiller : public Spiller {
-protected:
- MachineFunction *mf;
- LiveIntervals *lis;
- LiveStacks *lss;
- MachineLoopInfo *loopInfo;
- VirtRegMap *vrm;
-public:
- StandardSpiller(MachineFunctionPass &pass, MachineFunction &mf,
- VirtRegMap &vrm)
- : mf(&mf),
- lis(&pass.getAnalysis<LiveIntervals>()),
- lss(&pass.getAnalysis<LiveStacks>()),
- loopInfo(pass.getAnalysisIfAvailable<MachineLoopInfo>()),
- vrm(&vrm) {}
-
- /// Falls back on LiveIntervals::addIntervalsForSpills.
- void spill(LiveRangeEdit &LRE) {
- std::vector<LiveInterval*> added =
- lis->addIntervalsForSpills(LRE.getParent(), LRE.getUselessVRegs(),
- loopInfo, *vrm);
- LRE.getNewVRegs()->insert(LRE.getNewVRegs()->end(),
- added.begin(), added.end());
-
- // Update LiveStacks.
- int SS = vrm->getStackSlot(LRE.getReg());
- if (SS == VirtRegMap::NO_STACK_SLOT)
- return;
- const TargetRegisterClass *RC = mf->getRegInfo().getRegClass(LRE.getReg());
- LiveInterval &SI = lss->getOrCreateInterval(SS, RC);
- if (!SI.hasAtLeastOneValue())
- SI.getNextValue(SlotIndex(), 0, lss->getVNInfoAllocator());
- SI.MergeRangesInAsValue(LRE.getParent(), SI.getValNumInfo(0));
- }
-};
-
-} // end anonymous namespace