diff options
| -rw-r--r-- | lib/CodeGen/StrongPHIElimination.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/CodeGen/StrongPHIElimination.cpp b/lib/CodeGen/StrongPHIElimination.cpp index aa25dfebd8..efe838186b 100644 --- a/lib/CodeGen/StrongPHIElimination.cpp +++ b/lib/CodeGen/StrongPHIElimination.cpp @@ -215,7 +215,9 @@ StrongPHIElimination::computeDomForest(std::set<unsigned>& regs) { stack.pop_back(); CurrentParent = stack.back(); - parentBlock = LV.getVarInfo(CurrentParent->getReg()).DefInst->getParent(); + parentBlock = CurrentParent->getReg() ? + LV.getVarInfo(CurrentParent->getReg()).DefInst->getParent() : + 0; } DomForestNode* child = new DomForestNode(*I, CurrentParent); @@ -361,7 +363,7 @@ void StrongPHIElimination::processBlock(MachineBasicBlock* MBB) { std::set<unsigned> ProcessedNames; MachineBasicBlock::iterator P = MBB->begin(); - while (P->getOpcode() == TargetInstrInfo::PHI) { + while (P != MBB->end() && P->getOpcode() == TargetInstrInfo::PHI) { LiveVariables::VarInfo& PHIInfo = LV.getVarInfo(P->getOperand(0).getReg()); unsigned DestReg = P->getOperand(0).getReg(); |