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-rw-r--r--llvm/lib/Transforms/Utils/LCSSA.cpp6
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/LCSSA.cpp b/llvm/lib/Transforms/Utils/LCSSA.cpp
index 3a089775c56..27067668a8d 100644
--- a/llvm/lib/Transforms/Utils/LCSSA.cpp
+++ b/llvm/lib/Transforms/Utils/LCSSA.cpp
@@ -305,6 +305,12 @@ bool llvm::formLCSSA(Loop &L, DominatorTree &DT, LoopInfo *LI,
ScalarEvolution *SE) {
bool Changed = false;
+#ifdef EXPENSIVE_CHECKS
+ // Verify all sub-loops are in LCSSA form already.
+ for (Loop *SubLoop: L)
+ assert(SubLoop->isRecursivelyLCSSAForm(DT, *LI) && "Subloop not in LCSSA!");
+#endif
+
SmallVector<BasicBlock *, 8> ExitBlocks;
L.getExitBlocks(ExitBlocks);
if (ExitBlocks.empty())
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