using namespace llvm;
char LiveStacks::ID = 0;
-static RegisterPass<LiveStacks> X("livestacks", "Live Stack Slot Analysis");
+INITIALIZE_PASS(LiveStacks, "livestacks",
+ "Live Stack Slot Analysis", false, false)
-void LiveStacks::scaleNumbering(int factor) {
- // Scale the intervals.
- for (iterator LI = begin(), LE = end(); LI != LE; ++LI) {
- LI->second.scaleNumbering(factor);
- }
-}
+char &llvm::LiveStacksID = LiveStacks::ID;
void LiveStacks::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
+ AU.addPreserved<SlotIndexes>();
+ AU.addRequiredTransitive<SlotIndexes>();
MachineFunctionPass::getAnalysisUsage(AU);
}
void LiveStacks::releaseMemory() {
- // Release VNInfo memroy regions after all VNInfo objects are dtor'd.
+ // Release VNInfo memory regions, VNInfo objects don't need to be dtor'd.
VNInfoAllocator.Reset();
S2IMap.clear();
S2RCMap.clear();
}
-bool LiveStacks::runOnMachineFunction(MachineFunction &) {
+bool LiveStacks::runOnMachineFunction(MachineFunction &MF) {
+ TRI = MF.getTarget().getRegisterInfo();
// FIXME: No analysis is being done right now. We are relying on the
// register allocators to provide the information.
return false;
}
+LiveInterval &
+LiveStacks::getOrCreateInterval(int Slot, const TargetRegisterClass *RC) {
+ assert(Slot >= 0 && "Spill slot indice must be >= 0");
+ SS2IntervalMap::iterator I = S2IMap.find(Slot);
+ if (I == S2IMap.end()) {
+ I = S2IMap.insert(I, std::make_pair(Slot,
+ LiveInterval(TargetRegisterInfo::index2StackSlot(Slot), 0.0F)));
+ S2RCMap.insert(std::make_pair(Slot, RC));
+ } else {
+ // Use the largest common subclass register class.
+ const TargetRegisterClass *OldRC = S2RCMap[Slot];
+ S2RCMap[Slot] = TRI->getCommonSubClass(OldRC, RC);
+ }
+ return I->second;
+}
+
/// print - Implement the dump method.
-void LiveStacks::print(std::ostream &O, const Module*) const {
- raw_os_ostream OS(O);
+void LiveStacks::print(raw_ostream &OS, const Module*) const {
OS << "********** INTERVALS **********\n";
for (const_iterator I = begin(), E = end(); I != E; ++I) {