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| author | Owen Anderson <resistor@mac.com> | 2008-01-09 10:41:39 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2008-01-09 10:41:39 +0000 |
| commit | 864e3a3762b2155b21c09273128dd2565df00d71 (patch) | |
| tree | 2c667355b1db3c19d5bcf05dc8a362bd6fed1f26 | |
| parent | 719fef648d8ed584fdd2b3e7c967cf0fe8c7925b (diff) | |
| download | external_llvm-864e3a3762b2155b21c09273128dd2565df00d71.zip external_llvm-864e3a3762b2155b21c09273128dd2565df00d71.tar.gz external_llvm-864e3a3762b2155b21c09273128dd2565df00d71.tar.bz2 | |
StrongPHIElim: Now with even fewer trivial bugs!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45775 91177308-0d34-0410-b5e6-96231b3b80d8
| -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 aa25dfe..efe8381 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(); |