diff options
Diffstat (limited to 'lib/CodeGen/LiveVariables.cpp')
| -rw-r--r-- | lib/CodeGen/LiveVariables.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp index 35c64e2..10c2158 100644 --- a/lib/CodeGen/LiveVariables.cpp +++ b/lib/CodeGen/LiveVariables.cpp @@ -277,7 +277,9 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) { // PHI nodes are guaranteed to be at the top of the block... for (MachineBasicBlock::iterator MI = Succ->begin(), ME = Succ->end(); MI != ME && MI->getOpcode() == TargetInstrInfo::PHI; ++MI) { - for (unsigned i = 1; ; i += 2) + for (unsigned i = 1; ; i += 2) { + assert(MI->getNumOperands() > i+1 && + "Didn't find an entry for our predecessor??"); if (MI->getOperand(i+1).getMachineBasicBlock() == MBB) { MachineOperand &MO = MI->getOperand(i); if (!MO.getVRegValueOrNull()) { @@ -288,6 +290,7 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) { break; // Found the PHI entry for this block... } } + } } } |