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Fix bug where we could iterate off the end of a basic block 

llvm-svn: 6116
This commit is contained in:
Chris Lattner 2003-05-12 14:26:38 +00:00
parent 584bae4733
commit 2e50ac75a0
1 changed files with 3 additions and 2 deletions
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5
llvm/lib/CodeGen/PHIElimination.cpp
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@ -76,8 +76,9 @@ bool PNE::EliminatePHINodes(MachineFunction &MF, MachineBasicBlock &MBB) {
// into the phi node destination.
//
MachineBasicBlock::iterator AfterPHIsIt = MBB.begin();
if (AfterPHIsIt != MBB.end())
while ((*AfterPHIsIt)->getOpcode() == TargetInstrInfo::PHI) ++AfterPHIsIt;
while (AfterPHIsIt != MBB.end() &&
(*AfterPHIsIt)->getOpcode() == TargetInstrInfo::PHI)
++AfterPHIsIt; // Skip over all of the PHI nodes...
RegInfo->copyRegToReg(MBB, AfterPHIsIt, DestReg, IncomingReg, RC);
// Update live variable information if there is any...