Verify loop info.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40062 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 1 deletions

diff --git a/lib/Analysis/LoopInfo.cpp b/lib/Analysis/LoopInfo.cpp
index d58f90df1e..8f9b43fa86 100644
--- a/lib/Analysis/LoopInfo.cpp
+++ b/lib/Analysis/LoopInfo.cpp
@@ -81,6 +81,18 @@ void Loop::print(std::ostream &OS, unsigned Depth) const {
     (*I)->print(OS, Depth+2);
 }
 
+/// verifyLoop - Verify loop structure
+void Loop::verifyLoop() const {
+#ifndef NDEBUG
+  assert (getHeader() && "Loop header is missing");
+  assert (getLoopPreheader() && "Loop preheader is missing");
+  assert (getLoopLatch() && "Loop latch is missing");
+  for (std::vector<Loop*>::const_iterator I = SubLoops.begin(), E = SubLoops.end();
+       I != E; ++I)
+    (*I)->verifyLoop();
+#endif
+}
+
 void Loop::dump() const {
   print(cerr);
 }
@@ -104,7 +116,6 @@ void LoopInfo::releaseMemory() {
   TopLevelLoops.clear();
 }
 
-
 void LoopInfo::Calculate(DominatorTree &DT) {
   BasicBlock *RootNode = DT.getRootNode()->getBlock();