diff options
Diffstat (limited to 'lib/CodeGen/LazyLiveness.cpp')
| -rw-r--r-- | lib/CodeGen/LazyLiveness.cpp | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/lib/CodeGen/LazyLiveness.cpp b/lib/CodeGen/LazyLiveness.cpp index 6fb35d2..a951c99 100644 --- a/lib/CodeGen/LazyLiveness.cpp +++ b/lib/CodeGen/LazyLiveness.cpp @@ -32,10 +32,12 @@ void LazyLiveness::computeBackedgeChain(MachineFunction& mf, calculated.set(preorder[MBB]); for (SparseBitVector<128>::iterator I = tmp.begin(); I != tmp.end(); ++I) { + assert(rev_preorder.size() > *I && "Unknown block!"); + MachineBasicBlock* SrcMBB = rev_preorder[*I]; - for (MachineBasicBlock::succ_iterator SI = SrcMBB->succ_begin(); - SI != SrcMBB->succ_end(); ++SI) { + for (MachineBasicBlock::succ_iterator SI = SrcMBB->succ_begin(), + SE = SrcMBB->succ_end(); SI != SE; ++SI) { MachineBasicBlock* TgtMBB = *SI; if (backedges.count(std::make_pair(SrcMBB, TgtMBB)) && @@ -44,7 +46,8 @@ void LazyLiveness::computeBackedgeChain(MachineFunction& mf, computeBackedgeChain(mf, TgtMBB); tv[MBB].set(preorder[TgtMBB]); - tv[MBB] |= tv[TgtMBB]; + SparseBitVector<128> right = tv[TgtMBB]; + tv[MBB] |= right; } } @@ -60,6 +63,12 @@ bool LazyLiveness::runOnMachineFunction(MachineFunction &mf) { backedge_target.clear(); calculated.clear(); preorder.clear(); + rev_preorder.clear(); + + rv.resize(mf.size()); + tv.resize(mf.size()); + preorder.resize(mf.size()); + rev_preorder.reserve(mf.size()); MRI = &mf.getRegInfo(); MachineDominatorTree& MDT = getAnalysis<MachineDominatorTree>(); @@ -106,8 +115,8 @@ bool LazyLiveness::runOnMachineFunction(MachineFunction &mf) { for (MachineBasicBlock::succ_iterator SI = (*POI)->succ_begin(), SE = (*POI)->succ_end(); SI != SE; ++SI) if (!backedges.count(std::make_pair(*POI, *SI)) && tv.count(*SI)) { - SparseBitVector<128>& PBV = tv[*POI]; - PBV = tv[*SI]; + SparseBitVector<128> right = tv[*SI]; + tv[*POI] |= right; } for (po_iterator<MachineBasicBlock*> POI = po_begin(&*mf.begin()), |
