LoopRotation: Check some invariants of the dominator updating code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163058 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopRotation.cpp b/lib/Transforms/Scalar/LoopRotation.cpp
index 2c76706..f8122bf 100644
--- a/lib/Transforms/Scalar/LoopRotation.cpp
+++ b/lib/Transforms/Scalar/LoopRotation.cpp
@@ -418,6 +418,9 @@
for (unsigned I = 0, E = HeaderChildren.size(); I != E; ++I)
DT->changeImmediateDominator(HeaderChildren[I], OrigPreheaderNode);
+ assert(DT->getNode(Exit)->getIDom() == OrigPreheaderNode);
+ assert(DT->getNode(NewHeader)->getIDom() == OrigPreheaderNode);
+
// Update OrigHeader to be dominated by the new header block.
DT->changeImmediateDominator(OrigHeader, OrigLatch);
}