LoopDeletion depends on loops having dedicated exits.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86180 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/LoopDeletion.cpp b/lib/Transforms/Scalar/LoopDeletion.cpp
index 866d8b41d9de8b5a602bc8c41164a23418ab1962..48817ab9d5ad923f56c15b89fa1122689c5961e5 100644 (file)
--- a/lib/Transforms/Scalar/LoopDeletion.cpp
+++ b/lib/Transforms/Scalar/LoopDeletion.cpp
@@ -115,6 +115,10 @@ bool LoopDeletion::runOnLoop(Loop* L, LPPassManager& LPM) {
   if (!preheader)
     return false;
   
+  // If LoopSimplify form is not available, stay out of trouble.
+  if (!L->hasDedicatedExits())
+    return false;
+
   // We can't remove loops that contain subloops.  If the subloops were dead,
   // they would already have been removed in earlier executions of this pass.
   if (L->begin() != L->end())