using namespace llvm;
char LazyLiveness::ID = 0;
+static RegisterPass<LazyLiveness> X("lazy-liveness", "Lazy Liveness Analysis");
void LazyLiveness::computeBackedgeChain(MachineFunction& mf,
MachineBasicBlock* MBB) {
// Step 0: Compute preorder numbering for all MBBs.
unsigned num = 0;
for (df_iterator<MachineBasicBlock*> DI = df_begin(&*mf.begin());
- DI != df_end(&*mf.end()); ++DI) {
+ DI != df_end(&*mf.begin()); ++DI) {
preorder[*DI] = num++;
rev_preorder.push_back(*DI);
}
if (!backedge_target.test(preorder[*POI]))
for (MachineBasicBlock::succ_iterator SI = (*POI)->succ_begin();
SI != (*POI)->succ_end(); ++SI)
- if (!backedges.count(std::make_pair(*POI, *SI)) && tv.count(*SI))
- tv[*POI]= tv[*SI];
+ if (!backedges.count(std::make_pair(*POI, *SI)) && tv.count(*SI)) {
+ SparseBitVector<128>& PBV = tv[*POI];
+ PBV = tv[*SI];
+ }
for (po_iterator<MachineBasicBlock*> POI = po_begin(&*mf.begin()),
POE = po_end(&*mf.begin()); POI != POE; ++POI)