diff options
Diffstat (limited to 'llvm/lib/VMCore')
| -rw-r--r-- | llvm/lib/VMCore/BasicBlock.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/VMCore/BasicBlock.cpp b/llvm/lib/VMCore/BasicBlock.cpp index 04f4e1cfc0d..d04e5546162 100644 --- a/llvm/lib/VMCore/BasicBlock.cpp +++ b/llvm/lib/VMCore/BasicBlock.cpp @@ -186,7 +186,11 @@ void BasicBlock::removePredecessor(BasicBlock *Pred) { // If the PHI _HAD_ two uses, replace PHI node with its now *single* value if (max_idx == 2) { - PN->replaceAllUsesWith(PN->getOperand(0)); + if (PN->getOperand(0) != PN) + PN->replaceAllUsesWith(PN->getOperand(0)); + else + // We are left with an infinite loop with no entries: kill the PHI. + PN->replaceAllUsesWith(Constant::getNullValue(PN->getType())); getInstList().pop_front(); // Remove the PHI node } |
