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PHI nodes not in the loop header aren't part of the loop iteration initial

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state. Furthermore, they might not have two operands. This fixes the underlying
issue behind the crashes introduced in r142781.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142788 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2011-10-24 05:51:01 +00:00
parent 4a3935c27e
commit 5bef0eb1de
1 changed files with 1 additions and 1 deletions
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2
lib/Analysis/ScalarEvolution.cpp
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@ -4856,7 +4856,7 @@ ScalarEvolution::getConstantEvolutionLoopExitValue(PHINode *PN,
for (DenseMap<Instruction *, Constant *>::const_iterator
I = CurrentIterVals.begin(), E = CurrentIterVals.end(); I != E; ++I){
PHINode *PHI = dyn_cast<PHINode>(I->first);
if (!PHI || PHI == PN) continue;
if (!PHI || PHI == PN || PHI->getParent() != Header) continue;
Constant *&NextPHI = NextIterVals[PHI];
if (NextPHI) continue; // Already computed!