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-rw-r--r--llvm/lib/Transforms/Utils/CloneFunction.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/CloneFunction.cpp b/llvm/lib/Transforms/Utils/CloneFunction.cpp
index f2d929f..c8d1212 100644
--- a/llvm/lib/Transforms/Utils/CloneFunction.cpp
+++ b/llvm/lib/Transforms/Utils/CloneFunction.cpp
@@ -672,6 +672,8 @@ Loop *llvm::cloneLoopWithPreheader(BasicBlock *Before, BasicBlock *LoopDomBB,
const Twine &NameSuffix, LoopInfo *LI,
DominatorTree *DT,
SmallVectorImpl<BasicBlock *> &Blocks) {
+ assert(OrigLoop->getSubLoops().empty() &&
+ "Loop to be cloned cannot have inner loop");
Function *F = OrigLoop->getHeader()->getParent();
Loop *ParentLoop = OrigLoop->getParentLoop();