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-rw-r--r--llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp b/llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp
index 5677fdaaff2..1290fc1cb23 100644
--- a/llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp
@@ -1176,7 +1176,7 @@ bool SystemZDAGToDAGISel::canUseBlockOperation(StoreSDNode *Store,
return false;
// There's no chance of overlap if the load is invariant.
- if (Load->isInvariant())
+ if (Load->isInvariant() && Load->isDereferenceable())
return true;
// Otherwise we need to check whether there's an alias.
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