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-rw-r--r--lib/Transforms/Utils/BasicBlockUtils.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/BasicBlockUtils.cpp b/lib/Transforms/Utils/BasicBlockUtils.cpp
index acaea195e7..fb217bfa98 100644
--- a/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -448,6 +448,7 @@ BasicBlock *llvm::SplitBlockPredecessors(BasicBlock *BB,
// Create the new PHI node, insert it into NewBB at the end of the block
PHINode *NewPHI =
PHINode::Create(PN->getType(), PN->getName()+".ph", BI);
+ NewPHI->reserveOperandSpace(NumPreds);
if (AA) AA->copyValue(PN, NewPHI);
// Move all of the PHI values for 'Preds' to the new PHI.