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-rw-r--r--lib/VMCore/Instructions.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/VMCore/Instructions.cpp b/lib/VMCore/Instructions.cpp
index efeb2c3766..d9c20872f8 100644
--- a/lib/VMCore/Instructions.cpp
+++ b/lib/VMCore/Instructions.cpp
@@ -167,7 +167,8 @@ Value *PHINode::hasConstantValue(bool AllowNonDominatingInstruction) const {
if (HasUndefInput && !AllowNonDominatingInstruction)
if (Instruction *IV = dyn_cast<Instruction>(InVal))
// If it's in the entry block, it dominates everything.
- if (IV->getParent() != &IV->getParent()->getParent()->front())
+ if (IV->getParent() != &IV->getParent()->getParent()->front() ||
+ isa<InvokeInst>(IV))
return 0; // Cannot guarantee that InVal dominates this PHINode.
// All of the incoming values are the same, return the value now.